I use it once in a blue moon. I'm suspicious that it refused to work without my contacts & phone permissions, even for manual number lookup. Why force contacts if you're not collecting it? I have disabled pop-ups & notifications through system settings & inside the app. It still serves heads up notifications & popup boxes randomly after calls. I'm sure it malicious design & circumventing the offical permissions. I'm pretty sure it violates play store policies. You say one thing, & do another.