The android ecosystem, at tleast the one on google-play is pretty weak. It seems like mostly web link or website API plugins providing no service greater than a browser bookmark on the desktop. To make matters worse there are so damn many duplicate apps on google-play which only differ in what ads it is downloading over my data plan. There are paid apps but even these are not a sure thing, they could also have malware. There are FOSS apps on the various app stores, but only F-Droid is all FOSS with available source code right there to review. Android is a badly implemented ecosystem, better to suited to taking payments or getting infected by requiring a hack for root, than serving the user like real Linux.