The original idle game. Bake cookies to rule the universe!
This is the official Cookie Clicker app by Orteil & Opti. Accept no substitutes!

• Tap to make cookies, then buy things that make cookies for you. Then tap some more!
• Hundreds of upgrades and achievements to unlock.
• The game continues while your phone is closed, so you can set up your ideal bakery and resume later to reap the delicious profits!
• Lovingly-crafted pixel art and flavor text!
• Ascend to gain permanent transcendental upgrades!
• Beware the grandmas!