If you get a new phone and want to install an app that works on your previous phone but the Play Store won't allow it, there might be a work-around.
As you upgrade your Android operating system apps that you already have installed will usually stay installed. Apps which have been abandoned and not upgraded often still work on the new Android versions. Even if the app's manifest doesn't officially declare the new Android API versions as being supported they often can continue to work. As new Android versions get released eventually they won't allow apps which target older Android API versions to be installed. However, these apps can often still work.
One fix for this is to repack the app to claim that it supports a newer Android API version. Even if it doesn't. This of course runs the risk that the app's internal code doesn't actually support a newer API version. But often if an app still works after an OS upgrade then it