Beta & closed testing

Try the next version early

Cornerstone is out now on Google Play — most people should just download the released app. This page is for the iPhone version, which is still in beta, and for testers who want early Android builds.

iPhone

Apple TestFlight · free · official

Install TestFlight from the App Store
Open the invite on your iPhone
Tap Accept, then Install

Open TestFlight invite Need TestFlight first? Get it free →

Android early builds

Play closed testing · optional

Join the tester Google Group
Open the “Install Cornerstone test” post
Tap the Play link and Install

Join the tester group Or just install the public release →

Heads up: the TestFlight link only works when tapped on the iPhone itself. Beta builds can be rough around the edges — that’s the point.

Found something broken?

Tell me — a one-line description of what you tapped and what happened is plenty. Reply in TestFlight, post in the tester group, or email michael@readcornerstone.com. I’m an independent developer and every report genuinely helps.