: Malicious or poorly optimized apps can cause your phone to run slowly, drain the battery rapidly, or display endless pop-up ads.
The screen was normal. The app icon was gone. He checked his downloads history. Nothing.
: Consider running an antivirus scan on your device to ensure everything is clean.
Additionally, I should check for any user reviews or forums where this app was discussed. If there are positive reviews, it might be trustworthy, but if there are reports of malware, then that's a red flag. Since the user is asking for free, they might not want to pay, but some apps require payment through in-app purchases or subscriptions.