My first solo app is an app to log progress of quiting smoking. No annoying ads, no payments check ot here https://play.google.com/store/ap... My second app is a tool that allows to merge pdfs and photos . You can take photos in real time or select from gallery. It's also free and doesn't have any ads. Also it's secure because everything happens on your device and no internet connection is needed. You can check it here: https://play.google.com/store/ap...