There is no widely recognized or official application specifically named "Yaps209 sign apk." This name likely refers to a specific or a package name (like a build identifier) of an existing APK signing tool.
An APK must be before it can be installed on an Android device. This signature verifies the developer's identity and ensures the app hasn't been tampered with. Recommended & Safe Tools Download Yaps209 sign apk
Are you trying to that you developed, or are you trying to re-sign a modified app for personal use? apk-signer - Apps on Google Play There is no widely recognized or official application