How to identify that the app has used expo?

As an app user, how can we identify that the app has used expo? Can i do it by recompiling it?

Who can guide me? I really want to know if my favorite app is developed by it

If it’s an Android APK, unzip the APK and look for something like ./assets/kernel.android.bundle

If you open that in a text editor and search for “Exponent” you should see several of them.
There should also be a file called “./assets/kernel-manifest.json” which should also have a lot of references to “exp”, “exponent” and “Exponent”.

I expect it’s similar for an iOS app.