Get Flock U

Play installs update automatically and billing runs through your Google account. Seven days free, then $4.99/month — cancel anytime in your Play subscriptions before the trial ends and you pay nothing.

1. Tap Download the APK. On a phone connection this takes a minute or two — if it stalls, tap it again; the download picks up where it left off rather than starting over.
2. Open the downloaded file. Android will warn that it is from an unknown source — that is normal for an app installed outside a store. Allow it.
3. If you already have Flock U installed from this page, it updates in place and keeps your settings. (A Play install and an APK install are separate builds — pick one; billing on this one runs through Stripe, with the same free week and 7-day trial.)