Also another important bit is, F-Droid builds the apk's (android apps) by themselve from source code. So you can be sure (as long as you trust F-Droid, which is

Also another important bit is, F-Droid builds the apk's (android apps) by themselve from source code. So you can be sure (as long as you trust F-Droid, which is completely open source, the infrastructure too) that the app you install is nothing but open source. Which is something you can't be sure on e.g. google play store or the apple app store.