When a developer "cracks" an app, they modify the original source code. This opens the door for to be injected into the file. Since UPX is used for private browsing, a malicious mod could actually record your traffic instead of protecting it. 2. Lack of Updates
UPX Premium APK Mod: Is It Really Worth the Risk for Private Browsing?
Removing all internal banners and video ads.
Optimized for fast loading even when routing through a proxy.
Supporting the developers ensures the service stays fast and secure.