What is this `.appodeal` file? I recently discovered a new file on my phone, named .appodeal, at the base of the Internal shared storage folder.

It appears to be a text file with just 4 characters: e30=.

How can I tell what app left it there, and what nefarious/tracking purpose it has?



The phone's currently running Android version 7.1.2.
This is generated by the Appodeal advertisement SDK integrated in some of your installed apps, likely to act as some sort of flag.

As for telling which app generated it, aside from going the hard way (installing and starting the apps one-by-one), you should also be able to use tools like MyAndroidTools to check the services and broadcast receivers an app possesses. Apps with ad SDKs will likely have services and receivers dedicated to maintaining the SDK.