This app does not collect any personal information. It caches playlist metadata (such as playlist IDs and titles) locally on your device and in your Google Drive so your data stays synced. No data is transmitted to any external servers.
Cached data remains on your device or in your Google Drive until you remove it or uninstall the app. To remove the data from Google Drive, open Settings -> Manage apps, find this app in the list, and choose the removal option you prefer.
The app does not collect, transmit, or share any personal data.