i use my ipad1 with soma.fm . I installed it like 2 years ago, so maybe you still could get the app from the store. When you asked to enter the verify code on the app-store you have to type in your password an then the verification code. See this old thread: https://discussions.apple.com/thread/7392317
the „archiveteam“ tried this, but it failed, you can read about it here:
https://wiki.archiveteam.org/index.php/INTERNETARCHIVE.BAK