Stick to the official version from the Google Play Store. If the premium features are out of budget, utilize the free version or look for alternative open-source parental control apps rather than resorting to cracked software.
The application requires two parts: the "Parent" app installed on the guardian's phone and the "Child" app installed on the target device. Once synced, the parent device acts as a remote control center, capable of locking the screen, blocking apps, and tracking location in real-time.