Ovens bake cookies while the game is closed. Each one costs $0.99 USD and after you buy them, you keep them forever. You can have a maximum of 10 Ovens.
You currently earn 10% of your CPS while away, and 2 hours of staying on.
Each Oven will give you 10% CPS, and +2 hours of staying on.If you purchase the Super ovens upgrade, each oven will stay on for
4 hours instead of two.If you have this game on an Amazon product, like a Kindle, the ovens and other in-game purchases are free, through the use of Amazon Underground.