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Clock Tower8
"The Clock Tower makes things happen faster in your village! Collect resources, train, research and build faster."

Clock Tower Ruin Clock Tower1 Clock Tower2 Clock Tower3
Ruin Level 1 Level 2 Level 3
Clock Tower4 Clock Tower5 Clock Tower6 Clock Tower7 Clock Tower8
Level 4 Level 5 Level 6 Level 7 Level 8

  • Summary
    • The Clock Tower is a building unlocked at Builder Hall Level 4.
    • It appears to be a Tower with a clock on top in which a hand turns clockwise.
      • It turns very fast when boosting.
    • When activated, the Clock Tower will make timers in the Builder Base speed eight times as fast as normal for a short duration. This duration can be increased by upgrading the Clock Tower.
      • It will speed up resource collectors, troop training, construction, upgrades and research timers as well as the regeneration of the Battle Machine.
    • The Clock Tower will not reduce the cool-down time of loot from Versus Battles.
    • The Clock Tower can be activated for free once every 7 hours, but can be activated anytime using Gems.
    • Upgrading the Clock Tower will disable its ability to boost for the duration of the upgrade.

  • Strategy and Tips
    • Use the Clock Tower's boost when upgrading or researching something in the Builder Base. However, the Clock Tower will not boost the Master Builder when he is gearing up buildings in your Home Village.
    • You can also use the boost while attacking to drastically speed up troop training as well as the Battle Machine's regeneration. This can be considered ideal when getting wins for loot in Versus Battles, as usually the troop training will be completed by the time the battle ends.
    • The Clock Tower is best placed outside the base as a distraction as it serves little, if any purpose on defense. Its 4x4 space makes it difficult to fit within the Walls. Additionally, due to its larger size, it may be easier to pick off than other buildings if defenses aren't placed properly.
    • The Clock Tower can be used to hide an opening in the Walls which can cause unexpected behavior in certain troops (such as Boxer Giants), and can also be used to funnel troops into traps. However, experienced players can see through this trick (for instance, by counting the wall segments) and plan their attack accordingly.

  • Upgrade Differences
    • The Clock Tower goes through significant visual changes at levels 3 and 5.
      • At level 1, the Clock Tower is rebuilt from its broken state but parts are still in disrepair.
      • At level 2, the roof planks are fixed and reinforced.
      • At level 3, the front undergoes a major repair. A large ladder is placed on the front. The upright barrel at the side switches place with the sideways barrel. A trapdoor replaces the repairs on the roof.
      • At level 4, the trapdoor hinges become metal and a metal frame under the trapdoor appears.
      • At level 5, the ladder is replaced by a cross in the front. You can also now see the gears inside through the "window" on the side of the tower.
      • At level 6, the holes in the trap door on top turns into a whole piece of metal.
      • At level 7, the front-bottom part gains two openings with one rotating gear each. The two front pillars gains some extra reinforcements and the side gains more steps.
      • At level 8, the hatch at the top of the tower is raised slightly, leaving a small opening where a yellow object can be seen.

  • Trivia
    • The Clock Tower sits with obstacles at the left side of the map when broken.
    • On 6/26/2017, the Clock Tower's boost duration was reduced by 50%, its boost speed was reduced to 8x (from 10x), and its cool-down time was reduced to 7 hours (from 8 hours).
      • However, the level 1 was only reduced by 40%, from 5 minutes to 3 minutes.
    • Above the door of the Clock Tower, you can see Roman numerals which correspond to the building's level. This is also on the Star Laboratory.
    • The Clock Tower's hand makes a full rotation every 30 seconds. This is double the speed of the second hand on a regular clock.
    • While a boost is active, many animations also appear to speed up as well. The Master Builder, Villagers as well as Troops stationed in Guard Posts and Army Camps move faster. The latter is purely aesthetic; troops will not move or attack faster during a Versus Battle while under a boost.
    • The Clock Tower was added on 22/5/2017.

  • Icon Descriptions
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Damage Per Second, Hitpoints, Range, Damage Type, Targets and Favorite Target.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Re-arm cost, Damage Type and Targets.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Damage Type and Targets.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Capacity, Production and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Capacity, Production and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Storage Capacity and Hitpoints.
    Icon InfoTapping this icon displays the Hut's Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Total Troop Capacity and Hitpoints.
    Icon InfoTapping this icon displays the Army Camp's Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Spell Capacity and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Elixir Storage Capacity, Gold Storage Capacity and Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Troop Capacity, Hitpoints and Troops inside.
    Icon InfoTapping this icon displays information about the Wall, such as Hitpoints.
    Icon InfoTapping this icon displays information about the Wall, such as Hitpoints.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Damage per Second, Hitpoints, Regeneration Time and Ability Level.
    Icon InfoTapping this icon displays information about the Clock Tower, such as Level, Damage per Second, Hitpoints, Regeneration Time and Ability Level.
    Icon InfoTapping this icon displays information about the Workshop, such as Level, Siege Machine Capacity and Hitpoints.
    Icon UpgradeTapping this icon begins upgrading the Clock Tower to the next level, if you have enough resources and a free Builder. When the Clock Tower is at maximum level, this icon is not shown.
    Icon HoBTapping this icon instantly upgrades the Clock Tower to the next level, at the cost of one Hammer of Building if you have one. When the Clock Tower is at maximum level, this icon is not shown.
    Icon FinishNowTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
    Icon FinishNowBoBTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
    Icon FinishNowBoETapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.
    Icon Builder PotionTapping this icon, which is displayed only while an upgrade is in progress, boosts all your Builders for 1 hour by a factor of ten, at the cost of one Builder Potion. This icon is only shown if you have at least one Builder Potion.
    Icon CancelTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
    Icon UpgradeWeaponTapping this icon, which is shown only when the Town Hall is level 12, begins upgrading the Giga Tesla to the next level, if you have enough resources and a free Builder. When the Giga Tesla is at maximum level, this icon is not shown.
    Icon HoBWeaponTapping this icon, which is shown only when the Town Hall is level 12, instantly upgrades the Giga Tesla to the next level, at the cost of one Hammer of Building if you have one. When the Giga Tesla is at maximum level, this icon is not shown.
    Icon UpgradeTapping this icon begins upgrading the Clock Tower to the next level, if you have enough resources and a free Master Builder. When the Clock Tower is at maximum level, this icon is not shown.
    Icon HoBTapping this icon instantly upgrades the Clock Tower to the next level, at the cost of one Hammer of Building if you have one. When the Clock Tower is at maximum level, this icon is not shown.
    Icon FinishNowTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
    Icon FinishNowBoBTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
    Icon FinishNowBoETapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.
    Icon CancelTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
    Icon GroundTapping this icon switches the Clock Tower attack mode to attack air units. This icon is only displayed while the Clock Tower is in Ground mode.
    Icon AirTapping this icon switches the Clock Tower attack mode to attack ground units. This icon is only displayed while the Clock Tower is in Air mode.
    Icon GroundTapping this icon switches the Clock Tower to be deployed as an air unit. This icon is only displayed while the Clock Tower is in Ground mode.
    Icon AirTapping this icon switches the Clock Tower to be deployed as a ground unit. This icon is only displayed while the Clock Tower is in Air mode.
    Icon ReArmTapping this icon re-arms this Clock Tower. This icon is only displayed after this Clock Tower has been triggered during an enemy attack.
    Icon ReArmAllTapping this icon re-arms all Traps. This icon is only displayed when one or more of your Traps have been triggered in a previous enemy attack.
    IconAllTrapsArmedThis icon informs you that all Traps are armed. It is not tappable, and replaces the re-arm icons.
    IconLoadXBowTapping this icon reloads this X-Bow with Elixir. This icon only appears if this X-Bow is not fully loaded.
    IconLoadAllXBowsTapping this icon reloads all X-Bows with Elixir. This icon only appears if one or more X-Bows are not fully loaded.
    IconLoadEagleTapping this icon reloads the Eagle Artillery with Elixir. This icon only appears if the player owns the Eagle Artillery but not an X-Bow, and if the Eagle Artillery is not fully loaded.
    IconLoadXBowEagleTapping this icon reloads all X-Bows and the Eagle Artillery with Elixir. This icon only appears if at least one of these buildings is not fully loaded, and will replace the icons above if the player has both an X-Bow and the Eagle Artillery.
    IconFullyLoadedXBowsThis icon informs you that all X-Bows are fully loaded. It is not tappable, and replaces the Load icons.
    IconFullyLoadedEagleThis icon informs you that the Eagle Artillery is fully loaded. It is not tappable, and only appears if the player owns the Eagle Artillery but not an X-Bow.
    IconFullyLoadedXBowEagleThis icon informs you that all X-Bows and the Eagle Artillery are fully loaded. It is not tappable, and replaces the icon above if the player has both an X-Bow and the Eagle Artillery.
    Icon GroundTapping this icon switches the X-Bow attack mode to attack both ground and air units. This icon is only displayed while the X-Bow is in Ground mode.
    Icon AirGroundTapping this icon switches the X-Bow attack mode to attack ground units only. This icon is only displayed while the X-Bow is in Air and Ground mode.
    IconLoadInfernoTapping this icon reloads this Inferno Tower with Dark Elixir. This icon only appears if this Inferno Tower is not fully loaded.
    IconLoadAllInfernosTapping this icon reloads all Inferno Towers with Dark Elixir. This icon only appears if one or more Inferno Towers are not fully loaded.
    Icon FullyLoadedDarkElixirThis icon informs you that all Inferno Towers are fully loaded. It is not tappable, and replaces the Load icons.
    Icon SingleTapping this icon switches the Inferno Tower attack mode to attack multiple enemies. This icon is only displayed while the Inferno Tower is in Single attack mode.
    Icon MultipleTapping this icon switches the Inferno Tower attack mode to attack a single enemy. This icon is only displayed while the Inferno Tower is in Multiple attack mode.
    IconLoadEagleTapping this icon reloads the Eagle Artillery with Elixir. This icon only appears if the Eagle Artillery is not fully loaded.
    IconFullyLoadedEagleThis icon informs you that the Eagle Artillery is fully loaded. It is not tappable, and replaces the Load icon.
    Icon Boost1Tapping this icon boosts your Gold production for 1 day at the cost of the displayed amount of Gems.
    Icon BoostAllTapping this icon boosts your Gold production of all the Clock Towers for 1 day at the cost of the displayed amount of Gems.
    Icon BoostAllPoRTapping this icon boosts the production of all the Resource collector buildings for 1 day at the cost of one Resource Potion. This icon is only shown if you have at least one Resource Potion.
    Icon CollectGoldTapping this icon collects the uncollected Gold from the Clock Tower.
    Icon NoCollectGoldThis icon informs you that you don't have Gold to be collected from your Clock Tower.
    Icon Boost1hTapping this icon boosts your troop training for 1 hour, reducing the time required to train troops by a factor of four for the duration of the boost.
    Icon BoostAllPoTTapping this icon boosts your troop training, spell brewing and hero regeneration for 1 hour, reducing the time by a factor of four for the duration of the boost, at the cost of one Training Potion. This icon is only shown if you have at least one Training Potion.
    Icon TrainTroopsTapping this icon opens up the troop training interface, allowing you to train troops.
    Icon TrainTroopsTapping this icon opens up the troop training interface, allowing you to train troops.
    Icon TrainTroopsTapping this icon opens up the troop training interface, allowing you to train troops.
    Icon ResearchTapping this icon opens up the Laboratory interface, allowing you to upgrade your troops' levels.
    Icon ResearchTapping this icon opens up the Star Laboratory interface, allowing you to upgrade your troops' levels.
    Icon Boost1hTapping this icon boosts your spell creation for 1 hour, reducing the time required to create spells by a factor of four for the duration of the boost.
    Icon BoostAllPoTTapping this icon boosts your troop training, spell brewing and hero regeneration for 1 hour, reducing the time by a factor of four for the duration of the boost, at the cost of one Training Potion. This icon is only shown if you have at least one Training Potion.
    Icon BrewSpellsTapping this icon opens up the Clock Tower's interface, allowing you to brew spells.
    Icon UpgradeTapping this icon begins upgrading the Clock Tower to the next level, if you have enough resources and a free Builder. When the Clock Tower is at maximum level, this icon is not shown.
    Icon HoHTapping this icon instantly upgrades the Clock Tower to the next level, at the cost of one Hammer of Heroes if you have one. When the Clock Tower is at maximum level, this icon is not shown.
    Icon FinishNowTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
    Icon FinishNowBoHTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Heroes. This icon is only shown if you have at least one Book of Heroes.
    Icon FinishNowBoETapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Heroes.
    Icon Builder PotionTapping this icon, which is displayed only while an upgrade is in progress, boosts all your Builders for 1 hour by a factor of ten, at the cost of one Builder Potion. This icon is only shown if you have at least one Builder Potion.
    Icon CancelTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
    Icon GuardTapping this icon puts the Clock Tower to sleep. This icon only appears when the Clock Tower is at full health and is in Guard mode.
    Icon SleepTapping this icon awakens the Clock Tower, whom will then help guard your village. This icon only appears when the Clock Tower is at full health and is in Sleep mode.
    Icon HealTapping this icon instantly heals the Clock Tower for the displayed amount of Gems. This icon only appears when the Clock Tower is currently regenerating health on the Altar.
    Icon Boost1hTapping this icon boosts the Clock Tower's regeneration speed for 1 hour, reducing the time required to regenerate the Clock Tower by a factor of four for the duration of the boost.
    Icon BoostAllPoTTapping this icon boosts your troop training, spell brewing and hero regeneration for 1 hour, reducing the time by a factor of four for the duration of the boost, at the cost of one Training Potion. This icon is only shown if you have at least one Training Potion.
    Icon UpgradeTapping this icon begins upgrading the Clock Tower to the next level, if you have enough resources and a free Builder. When the Clock Tower is at maximum level, this icon is not shown.
    Icon HoHTapping this icon instantly upgrades the Clock Tower to the next level, at the cost of one Hammer of Heroes if you have one. When the Clock Tower is at maximum level, this icon is not shown.
    Icon FinishNowTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
    Icon FinishNowBoBTapping this icon, which is displayed only while the Battle Machine is being rebuilt, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
    Icon FinishNowBoHTapping this icon, which is displayed only while the Battle Machine is being upgraded, instantly finishes that upgrade at the cost of one Book of Heroes. This icon is only shown if you have at least one Book of Heroes.
    Icon FinishNowBoETapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building or Book of Heroes, where relevant.
    Icon CancelTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
    Icon HealTapping this icon instantly heals the Clock Tower for the displayed amount of Gems. This icon only appears when the Clock Tower is currently regenerating health on the Altar.
    Icon RequestTroopsTapping this icon requests troops from your fellow clan members. It will appear if your Clan Castle is not already full and the timer since your last request has elapsed.
    Icon RequestNowTapping this icon requests troops from your clan members without waiting for the timer at the cost of the displayed number of Gems. It will appear if your Clan Castle is not already full and the timer since your last request is still counting down.
    Icon CastleFullThis icon informs you that your Clan Castle is full of troops and spells. It will replace both Request icons if the Clan Castle is full.
    Icon ClanTapping this icon displays information about the clan which the player owning the Clan Castle belongs to (this icon can appear when you are visiting another village). This icon only appears if the player owning the Clan Castle is in a Clan.
    Icon TreasuryTapping this icon displays information about your Treasury.
    Icon MagicItemsTapping this icon displays information about your inventory of Magic Items.
    Icon GuardTapping this icon puts the Clock Tower to sleep, preventing any troops inside from guarding your village. This icon only appears when the Clock Tower is in Guard mode.
    Icon SleepTapping this icon awakens the Clock Tower , allowing any troops inside to help guard your village. This icon only appears when the Clock Tower is in Sleep mode.
    Icon Wall RingTapping this icon upgrades the Wall to the next level, if you have enough Wall Rings and a free Builder. When the Wall is at maximum level, this icon is not shown.
    Icon SelectRowTapping this icon selects a row of Walls to move or rotate instead of a single Wall. The longest contiguous row of Walls will be selected.
    Icon RotateRowTapping this icon rotates the selected row of Walls. This icon is only displayed while you have multiple Walls selected.
    IconUpgradeRowTapping this icon upgrades all the upgradable Walls in the selected row to the next level, if you have enough resources and a free Builder. This icon is only displayed while you have multiple Walls selected.
    Icon RotateRowTapping this icon rotates the selected row of Walls.
    IconUpgradeRowTapping this icon upgrades the selected Walls to the next level, if you have enough resources and a free Master Builder. When the selected Walls are at maximum level, this icon is not shown.
    Icon Wall RingTapping this icon upgrades the selected Walls to the next level, if you have enough Wall Rings and a free Master Builder. When the selected Walls are at maximum level, this icon is not shown.
    Icon RotateTapping this icon rotates the Air Sweeper 45 degrees clockwise.
    Icon GearUpTapping this icon gears up the Clock Tower, if you have upgraded it enough to do so, have enough resources and a free Master Builder. If any Clock Tower is already geared up, this icon will not appear.
    Icon NoGearUpThis icon informs you that the Clock Tower cannot be geared up because it is insufficiently upgraded. Tapping this icon will tell you the required level to gear up this Clock Tower. If any Clock Tower is already geared up, this icon will not appear.
    Icon NormalTapping this icon switches the Clock Tower to Burst mode. This icon only appears when the Clock Tower is geared up, and is in Normal mode.
    Icon BurstTapping this icon switches the Clock Tower to Normal mode. This icon only appears when the Clock Tower is geared up, and is in Burst mode.
    Icon LongRangeTapping this icon switches the Archer Tower to Fast Attack mode. This icon only appears when the Archer Tower is geared up, and is in Long Range mode.
    Icon FastAttackTapping this icon switches the Archer Tower to Long Range mode. This icon only appears when the Archer Tower is geared up, and is in Fast Attack mode.
    Icon LongRangeTapping this icon switches the Archer Tower to Fast Attack mode. This icon only appears when the Archer Tower is in Long Range mode.
    Icon FastAttackTapping this icon switches the Archer Tower to Long Range mode. This icon only appears when the Archer Tower is in Fast Attack mode.
    Icon RotateTapping this icon rotates the Push Trap 90 degrees clockwise.
    Icon LootCartTapping this icon collects the loot from the Loot Cart.
    Boat iconTapping this icon switches between the Home Village and the Builder Base.
    Icon FreeBoostTapping this icon boosts timers in the Builder Base, by a factor of eight for a duration determined by the level of the Clock Tower. This icon is only displayed when a free boost is available.
    Icon CTPTapping this icon boosts timers in the Builder Base, by a factor of eight for 30 minutes, at the cost of one Clock Tower Potion. This icon is only displayed if you have at least one Clock Tower Potion.
    Icon BoostNowTapping this icon allows you to boost the Clock Tower before its free boost is available, at the cost of the displayed amount of Gems. This icon is only displayed when the Clock Tower's free boost is in cooldown.
    Icon RemoveGoldTapping this icon removes this obstacle using Gold, if you have enough Gold and a free Builder. This icon only appears if the obstacle is in the Home Village and requires Gold to remove.
    Icon RemoveElixirTapping this icon removes this obstacle using Elixir, if you have enough Elixir and a free Builder. This icon only appears if the obstacle is in the Home Village and requires Elixir to remove.
    Icon RemoveGoldBTapping this icon removes this obstacle using Gold, if you have enough Gold and a free Master Builder. This icon only appears if the obstacle is in the Builder Base and requires Gold to remove.
    Icon RemoveElixirBTapping this icon removes this obstacle using Elixir, if you have enough Elixir and a free Master Builder. This icon only appears if the obstacle is in the Builder Base and requires Elixir to remove.
    Icon CancelTapping this icon, which is displayed while the selected obstacle is being removed, cancels the removal of this obstacle and refunds the full cost.
    Icon SellTapping this icon sells the selected decoration for one-tenth of their price.
    Icon GoldHVTapping this icon completely fills the Gold Storages, at the cost of one Rune of Gold. This icon is only shown if you have at least one Rune of Gold.
    Icon GoldBBTapping this icon completely fills the Gold Storages, at the cost of one Rune of Builder Gold. This icon is only shown if you have at least one Rune of Builder Gold.
    Icon ElixirHVTapping this icon completely fills the Elixir Storages, at the cost of one Rune of Elixir. This icon is only shown if you have at least one Rune of Elixir.
    Icon ElixirBBTapping this icon completely fills the Elixir Storages, at the cost of one Rune of Builder Elixir. This icon is only shown if you have at least one Rune of Builder Elixir.
    Icon DarkElixirTapping this icon completely fills the Dark Elixir Storage, at the cost of one Rune of Dark Elixir. This icon is only shown if you have at least one Rune of Dark Elixir.
    Icon Builder PotionTapping this icon boosts all your Builders for 1 hour by a factor of ten, at the cost of one Builder Potion. This icon is only shown if you have at least one Builder Potion.
    Icon Boost1hTapping this icon boosts your siege machine training for 1 hour, reducing the time required to train Siege Machines by a factor of four for the duration of the boost.
    Icon BoostAllPoTTapping this icon boosts your siege machine training, spell brewing and hero regeneration for 1 hour, reducing the time by a factor of four for the duration of the boost, at the cost of one Training Potion. This icon is only shown if you have at least one Training Potion.
    Icon TrainTroopsTapping this icon opens up the siege machine training interface, allowing you to train Siege Machines.
    Size Size
    4x4
    Builder Hall Level 1 2 3 4 5 6 7 8
    Number Available 0 0 0 1 1 1 1 1
    Level Level Hitpoints Hitpoint Boost Duration Stopwatch Time Gained per Boost Stopwatch Relative Boost* Catch-Up Point of Construction** Catch-Up Point of Boost*** Build Cost GoldB Build Time Stopwatch Experience Gained XP Builder Hall Level Required Builder Hall8
    1 650 3m 21m 4.96% 6 times N/A 150,000 2h 84 4
    2 800 4m 28m 6.60% 26 times N/A 180,000 3h 103 4
    3 960 5m 35m 8.24% 35 times N/A 220,000 4h 120 4
    4 1,152 6m 42m 9.86% 52 times N/A 300,000 6h 146 4
    5 1,382 7m  49m 11.48% 69 times 1 time 700,000 8h 169 5
    6 1,658 8m 56m 13.08% 86 times 3 times 1,200,000 10h 189 6
    7 1,990 9m 63m 14.69% 103 times 6 times 1,700,000 12h 207 7
    8 2,388 10m 70m 16.28% 206 times 22 times 2,200,000 1d 293 8

    * Relative boost refers to the total time gain as a percentage of 7 hours (the cooldown for a free boost) and boost duration (the cooldown starts countdown after the boost duration), and hence how much faster time will progress in your Builder Base on average. This is assuming that you activate the Clock Tower as soon as the 7 hour cooldown ends, and also assumes that you do not spend any Gems in activating the Clock Tower early.

    ** The Catch-Up Point of Construction is the minimum number of boosts for which the newly upgraded Clock Tower has equaled the time for upgrading the Clock Tower had it not been upgraded - this does not consider recovering the cost of the Gold required to perform the upgrade.

    The formula of Catch-Up Point of Construction time is:

    $ \Biggl\lceil {Construction Time\over \Delta TimeGainedPerBoost} \Biggr\rceil $

    *** The Catch-Up Point of Boost is the minimum number of boosts for which the newly upgraded Clock Tower has provided enough time gain such that the time lost by the inability to immediately use the free boost due to the construction of the Clock Tower is negated. This does not apply to Clock Towers level 4 and below, whose construction time is less than the current cooldown time of 7 hours.

    The formula of Catch-Up Point of Boost is:$ \Biggl\lceil{TimeGainedPerBoostBeforeUpgraded \over \Delta TimeGainedPerBoost}*{Construction Time-BoostCooldown \over BoostCooldown}\Biggr\rceil $

    (given that $ Construction Time > BoostCooldown $)

    where $ \Delta TimeGainedPerBoost = $$ TimeGainedPerBoostAfterUpgraded - TimeGainedPerBoostBeforeUpgraded $

    For additional statistics and information, see the Unit Calculators page.

    Builder Base Buildings
    Defensive Buildings CannonDouble CannonArcher TowerHidden TeslaFirecrackersCrusherGuard PostAir BombsMulti MortarRoasterGiant CannonMega TeslaWalls
    Traps: Push TrapSpring TrapMineMega Mine
    Resource Buildings Builder HallGold MineElixir CollectorGold StorageElixir StorageGem Mine
    Army Buildings Builder BarracksArmy CampStar LaboratoryBattle Machine Altar
    Other Buildings BoatDecorationsObstaclesClock Tower