Please refer to VirusTotal scan results, 60 virus detection software are only reported by Avast-Mobile.
This false positive first appeared in version 3.1.4.0. After communicating with Avast the problem was resolved.
We checked this with our virus specialists once more and the app has now been whitelisted. This change should take effect with the next virus definitions update.
The main reasons this app was detected previously were features like hiding app icon, changing ringer volume and similar, but we have since classified these rules as out of scope of this app. We are sorry for the inconvenience.
Here is their response
False positive have occurred again in the new version 3.1.5.2. Ignore this warning if you are affected by this. Please report this false positive to Avast through the Avast App. You can also change to other virus detection software.
Now that Avast’s guidelines have been added to the whitelisting program, hope the problem can be solved.
It’s too bad. Because it causes a lot of bad reviews on Google Play.😂