Just installed #Movim app via @fdroidorg , couldn't login. Next step is to try it in the browser instead. My Android is ancient (4.4.4), so that could be something to do with it? But every other app I've installed on it from #FDroid works fine, including some quite demanding ones like #OSMAnd+ and #Riot.
@strypey I think Movim still uses the webview in the app, not sure what's the support of webview on android 4. Also, the login is kinda funny and for a couple of seconds it may look like nothing is happening, while it's probably talking to the XMPP server in the background