Search for a trusted source (avoid v3.0 cl1ckbait sites). Look for community forums like XDA Developers or modded repository sites with user feedback. The file name should look like Smarthertz_v4.2_NoRoot_Mod.apk .
: Automatically lower the refresh rate when your battery is low or when the device is on ambient display to extend runtime. Automatic Detection Smarthertz No Root Mod Apk
[SYSTEM]: Requesting Root Access to Optic Nerve. Search for a trusted source (avoid v3