Songs recorded inside Anytune are stored within the app's sandbox. These files are exclusive to the app (including Anytune and Anytune Pro+).
Songs explicitly imported into Anytune (not played from your device's music library) must be exported to another app, device or into your iTunes library.
The Song's settings, marks, lyrics, ... are saved to iCloud and are available across app instances. See Sharing song data (configs)
To move a song from Anytune to Anytune Pro+:
On Source App (Anytune):
- Play (load) the song you want to export
- Tap the sharing button
- Choose "Export Song"
- Select "Original Song"
- Select "Open-In"
- Tap the "Export via Open-In" button
- Choose Anytune (target)