3 Keys is an iPhone app developed by Three Keys Brewery and Pub LLC, available for free in the Lifestyle category. This app allows users to earn and track rewards at participating stores effortlessly. By checking in on an in-store tablet with a QR code on the app, users can view available rewards, track progress towards future rewards, access store information, refer friends through the app, view transaction history, and more.

The 3 Keys app provides a convenient way for users to engage with their favorite stores, earn rewards, and stay updated on their progress, all within a user-friendly interface on their iPhone.