The Cogwheel is the third upgrade. More cogwheels let the main cogwheel spin faster to produce more coins. You can spin the cogwheels with your finger in the direction the arrows point to spin them your self. This is often better than an Engine but required your input.

You can attach an Engine to the end of a chain on cogwheel to spin them all without your help or if the app is closed.

Level Cost Effect
1 20
2 100
3 500
4 2500
5 10000
6 50000
7 250000
8 1250000
9 6250000
10 31250000

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