Helium Backup is probably the best way to back up your app data on your Android phone or tablet, especially if you’re not rooted, which is the majority of you. We featured it in our best ways to back up apps guide, but back then it was called Carbon.
The only issue with the app itself is that you need to initiate it through your desktop with a Windows application, then the mobile app will do the rest. That’s not the developer Koushik Dutta’s fault. It’s just how Android works in that it needs adb in order to save these backups, and the desktop app just streamlines it for you. Things are still the same, but if you’re a Chrome user, you can grab the Chrome app instead of using Windows. What makes this interesting is that you can now use a Chromebook since the Chrome OS now supports the connection of Android devices via the USB port. Of course you can still use the Chrome app on your Windows or Mac computer.