Calculator: Unitto, also functions as a unit, date and time zone convertor. Very useful

Camera: Don’t know

Calendar: Fossify. I have tried etar in the past but didin’t like it (can’t remember why)

I think exodus might be mistaking the fdroid version of material files for the google play version. I’ve been using material files for a while and i never had any issues. Besides that: Voice recorder: Simple voice recorder (planning to switch to fossify when it get’s finished) Gallery: Aves Libre (Love the design and sorting by file type features. The only thing i’m missing is a native photo editor)