I understand you're looking for information about downloading an APK signer tool, specifically in relation to Uber or similar apps. However, I want to provide you with important context first.
Open a terminal or command prompt in the folder containing the .jar file and your APK. Execute:
Standard command-line tools can be cumbersome, requiring multiple steps for aligning and signing. Uber APK Signer is considered "better" by many in the community for several reasons: