While later versions of LADB added UI tweaks and some modern design elements, version 1.3.1 is often viewed as the version that "did it all." It included the script editor, the tutorial library, and the notification listener service required for setting up the ADB permission without a PC (using the "Wireless Debugging" or "OTG" methods).
The Google Play Store is the safest way to get the app. However, the Play Store usually serves the latest version by default. To get version 1.3.1 specifically, you may have to wait if the developer rolls back an