App Info : How To Sideload Android Apps | Gizmodo Tech

Google Play won’t let you install apps to your device if it is deemed‘incompatible’ due to screen size, while others apps are made available only for specific handsets. In both cases, you may be able to get around that through a manual installation, a process often referred to as “sideloading”. Here’s how to do it.

Make Use Of outlines the relatively simple
steps involved in sideloading apps to your
Android device. The most difficult stage is
usually getting hold of a copy of the APK file
for the app you wish to install. These can often
be found on forums or developer sites, but be
cautious; installing an unknown APK file poses a
clear and definite security risk.
Once you’ve obtained the file you need to
connect your phone or tablet to your computer
via USB, turn on USB storage mode and copy
the APK to your device.

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How To Sideload Android Apps | Gizmodo Australia