What is this `.appodeal` file?

Question

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.


— Brock Adams | Sources

Answer

It seems to be from an ad revenue targetted app by the same name appodeal on the play store and Google search reveals multiple references



Try to track it in your phone using Anti adware or use ad blockers from Izzy's list


— beeshyams | Sources

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