Although the company defends that they do nothing with that data. Another problem, common when an Android app is popular, is that copies arise. It happens with FaceApp too. The network is filling up with copies of the application, which could be dangerous because some contain malware.
Some copies of FaceApp have also appeared on Google Play, which are false. But in other stores, where you download applications in APK format, the problem is greater. There are many fake versions, which in some cases could infect the user's phone that downloads it from malware.