The app "National Anthems" is over 150 national anthems with flags. From countries around the world and all inhabited continents. Songs in 11 languages are available for some anthem. The app is very good for learning geography and also for fun. All anthem are grouped by continents.
It's secure to download the app. Cygnus Software developed National Anthems PRO that lies within the Music & Audio category. The tool was downloaded and set up by over 1K users and its most recent stable update was on Oct 11, 2020.