Compare Great Building Boosts
Recommendations are based on level 201 for Gold and level 101 for Copper-only.
How tiers and boosts work
When boosts grow
Level
1101200301401500
Copper
1–200Boosts stay →
Gold
101–500
Both tiers grow at levels 101–200.
Copper-only buildings stop at 200. Gold can continue past 500 with smaller gains. Official tier rules ↗
What the numbers mean
Flat boost or multiplier
With a 5,000% starting boost:
+10% boost 5,010%10% multiplier 5,500%
25% ×82/24hA 25% chance on each of 82 daily attempts.
K = thousand · M = million. More levels help only when you use the boost.
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