The legitimate Carly app, available on Google Play and the Apple App Store , offers: Carly — OBD2 car scanner - Apps on Google Play
The is a diagnostic tool designed to help vehicle owners monitor their car's health and perform maintenance through an Android app. While you are asking about a "Mod APK" (specifically v48.57), it is important to understand what the official application provides and the risks associated with modified versions. Official Features & Functionality