Enable “Install unknown apps” on Android 13 (per-app permission)

Android 13 doesn’t use the old “Unknown sources” switch like before, and yeah that can feel annoying when you just want to install an APK and move on. Now it’s a per app permission. So instead of turning it on once for the whole phone, you pick the exact app that’s trying to install the file, like Chrome, Files, or your file manager. That’s actually safer, but it also means if you tap an APK and it says blocked, you gotta go find the right setting.

I usually start by thinking, ok where did this APK come from. Did I download it in Chrome. Did someone send it in a chat app. Or did I grab it from a folder using Files. Because Android 13 only lets that app install stuff after you allow it. Once you know the app, the rest is pretty quick.

Quick path to the setting

Go to Settings, then Apps, then look for something like Special app access, then Install unknown apps. From there you’ll see a list of apps. Tap the one you used and turn on Allow from this source.

If your settings menu looks different, I don’t panic. I just use the search bar at the top of Settings and type install unknown apps. It usually pops up right away.

A few common cases

If it was Chrome: open that same “Install unknown apps” list and pick Chrome. Flip the switch on.

If it was Files by Google or your phone’s file manager: do the same thing but choose that files app instead. This one gets people because they think Chrome is enough, but they downloaded in Chrome and then opened in Files so Android cares about Files now.

If it was a messaging app: same idea, just pick that app in the list. It feels weird giving a chat app install power so if i’m doing this i turn it off again after.

Tiny troubleshooting when it won’t work

If nothing installs even after turning it on, i check three things fast. First i make sure i allowed the correct app. Second i check if Play Protect is blocking something and read what it says before tapping anything risky. Third i check if my APK is broken or not meant for my phone version.

Small ending

The main trick is remembering Android 13 makes this permission per app. Find which app is handling the APK, allow installs for that one source, install what you need, then turn it back off if you don’t need it anymore.