Updates to Google Play Store can cause problems when installing or updating Android applications. The app download process gets stuck (e.g. showing 97%) and never finishes. Error codes 907 or 963 may pop up too.
- You may need to clear cache and data of the Google Play Store app on your device. Go to: Settings → Applications → Application manager (or find the Google Play Store in the list) → Google Play Store app → Clear Cache, Clear Data.
- It is also possible to uninstall the Google Play updates and roll back the app version to fix the issue. Go to: Settings → Applications → Google Play Store app → Uninstall updates
- After that go to the Google Play Store and download Yousician again.