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Android 5 or higher is required, so if google says your phone is still not supported then there's not much we can do for that, but, if the app actually crashes then the details of that are automatically logged so that we can track it down for you.

Thank you for your answer! Unfortunately I'm stuck on Android 4.4.4 and no updates available.

aaah, yeah that would explain it. When you do get a new phone though and you need some help just let me know, I'm always online. :)
keybase io / kenCode
kenCode at protonmail ch

I'm very tempted to buy one just for this purpose now =)