Google Play says “App not available”.
Your phone's Play Store is signed in with a different Google account than the one that joined the group, or you joined a minute ago. Join with the Play Store account (or switch accounts in Play), wait a few minutes and open the link again.
How much time does it take?
Joining takes a couple of minutes. During a test, opening the app a few times a week and using it for real is enough. Google wants to see real use, so please don't just install it and forget it.
Is a test version safe to install?
It's distributed through Google Play and goes through the same checks as any app there. It can still have bugs, which is the point, so don't rely on a test version for anything important until it's out of testing.
Can I leave in the middle of a test?
Yes, any time. For a paid test the reward is for the full period, so leaving early means no reward, and for a closed test it means we have to find a replacement. A heads-up by email is appreciated.
Do you have iPhone tests?
Not yet. Our current apps are Android and web. If an iOS test comes up, the group hears about it first.
Is my feedback public?
Email and the private feedback on Google Play go only to us. Posts in the group are visible to other members, so send anything personal by email.