Get Blackletter

Updated 2 October 2026

Blackletter is an iPhone app, currently in beta through Apple’s TestFlight.

On your iPhone, follow the TestFlight page to install Apple’s TestFlight app if needed, accept the beta invitation, then install Blackletter. If the beta is full, unavailable or the build has expired, contact support.

Already a member?

Open Blackletter and choose Sign in with Apple with the same Apple account you used to join. You do not need another invitation, even if your original link is now used or expired.

Open Blackletter

Joining for the first time?

Installing the app does not create an account. After installation, return to the invitation your friend sent and open it again. Or paste the link into Have an invite link or code? on the welcome screen and tap Open. Check the phone-number ending before joining.

If Apple sign-in cannot find your account, check which Apple account you used to join. For a changed number or an Apple account you can no longer access, see account help.