Fractal is a matrix client developed as part of the Gnome project.
Fractal is available in Alpine's community repository and can as such be installed as follows:
# apk add fractal
Passwords are not saved
On some postmarketos installation, no keyring is created by default. This can be solved by downloading thepackage from alpine repos, pressing File > New > Password Keyring, and naming it login. You may have to use seahorse to unlock the keychain on each reboot, if your UI does not support unlocking keychains.