Legacy versions of the app, such as 1.7.2.677-b1cbe6a , are frequently sought out on third-party sites because newer versions may have different feature sets or compatibility issues. Safety and Installation Risks
If you are working with a legitimate APK you have modified yourself, the process generally involves: Optimizing the APK file.
It is highly recommended to use the official Google Play Store version of Legend to ensure your data remains secure. How to Install (For Developers or Advanced Users)
Using a tool like apksigner to certify the file for Android.