So recently a favorite app of mine has been taken down from Google Play Store. But even though the app is no longer available on Play Store, it is still on my phone and tablet (both from Samsung company) and works perfectly fine on both of my devices. Also, when I go to 'My Apps and Games', I still see the app on 'Library' and 'Installed' options.
I'm aware that in order for my favorite app to function properly, I must ignore software updates on my devices. Hence, I've been ignoring software update notifications ever since.
But what I really want to know is that, will I be able to install the app from 'Library' on a new device from Samsung or any other company even when it is no longer in Play Store? Or doing so will cause the app to malfunction across all my devices? Will the app still be safe on my old devices?