Donut machines explained
You can buy several donut machines in the store with coins or gems.
The general rule: the more expensive the machine, the faster the donut production.
The speed boost is shown by the percentage in the top-right corner of the machine preview.
To buy a machine, tap its preview and confirm in the popup.
To switch to a machine you’ve already bought, just tap on it.
Machines you’ve bought cannot be sold.