To understand why these Mod APKs rarely work as advertised, one must understand how they function technically. There are generally two categories of these mods:

APK files can be decompiled, injected with malicious code, and recompiled. A "TikTok Mod" often serves as a Trojan horse. While the user is checking their fake follower count, the APK might be scraping the user's contacts, SMS history, photos, or banking credentials in the background.