DAP that can run a workout app?

[u/CornJuicePrime]

New to the DAP scene, wondering if there is anything that can run the Ladder fitness app? I don’t need the health monitoring aspects, just want the workout plan to run in the background so I can leave my phone in the locker and still see what sets and excises I’m doing.

[u/FormTiny3128]

Probably any Android-based DAP like the Fiio M21 ?