Failure to install Android APK "App not installed as package appears to be invalid"

[PureTryOut]

I'm trying to install the Android APK (I'm just assuming it's an Android package rather than an Alpine Linux one which also uses the .apk extension 😜) on an aarch64 device running Android 13 (CalyxOS to be exact). However it fails to do so mentioning the package appears to be invalid.

(sorry for the large picture size, not sure how to make GitHub show it smaller and I'm too lazy to resize the image locally)

[MayaPosch]

Was the NymphCast Player app previously installed on the phone?

I cannot reproduce the issue on my Xiaomi phone with Android 13, with APK sideloading enabled. I'm not sure CalyxOS does anything special in this regard, or has special demands for APKs? Does the app from the Google app store install without issues?

[PureTryOut]

It was not no. Clean install basically.

CalyxOS has no special demands for APKs. At runtime there is the issue of no Google Play Services (and I have MicroG disabled) but that isn't a blocker to install APKs. I did not realize NymphCast was on the Google Play Store though. I would try that one but the app I'm using to install stuff from there (Aurora Store) has issues currently preventing me from doing so. Have you considered putting it on F-Droid?

[PureTryOut]

I managed to install the release on the Google Play Store, that one works just fine. Not sure what's different about the GitHub release.

[MayaPosch]

The APK attached to the v0.1 release does appear to be somewhat older at least. I'll make sure to put up a new APK with the v0.2-alpha0 pre-release.

I have considered other app stores as well, yes. I put it on the Play Store first because I already had an account there, but releasing it on other app stores is on the TODO list, possibly with the v0.2 release cycle.