Is there a mobile checkbook app that is compatible with Samsung S6? I had this app on Samsung Galaxy Ace 3. It is perfect for my needs and can't find anything similar.
A simple search on Play Store indicates that there are plenty of applications related to checkbooks and accounting. It's impossible to diagnose all of them, but based on experience I can say that you have the possibility of install every app that you see on a "checkbook" search. You can use any application that you find using the results list link posted below.
Search results: https://play.google.com/store/search?q=checkbook&c=apps&docType=1&sp=CAFiCwoJY2hlY2tib29regIYAIoBAggB:S:ANO1ljIgQj0