I have pop up's that say they are helping my phone. They are followed by ads. Make them stop.

[Android Central Question]

I can't figure out what app is causing these screens popping up interrupting everything saying either 'Optimizing Battery', 'Speeding up Your Phone', 'Speeding your Internet' and 'Cooling your phone'.
When I close them, they are followed up by an ad, half the time noisy.
I can't figure out what is on my phone that is causing it.
Please help.

 

[Javier P]

Welcome to the forums. That's caused by an app that you downloaded. The usual culprits are cleaners, boosters, antivirus, photo editors ... See if this guide helps you to identify the culprit.

https://forums.androidcentral.com/showthread.php?t=901497