Can recommend the ap80 pro X, small enough to use as a workout/chores unit and works great as usb dac or LDAC streaming from your phone. I don't like using tidal unless I have to so the m1s is kind of out for me. Course could stream it like ap80 pro X but the size is better on the hidizs for me.
AP80 px is very neutral and like all hidizs stuff very detailed and revealing. But you can get nice results with mseb system if you want more warmth. I feel at least m1s will be warmer than ap80 and the new m0. But that's just a quess , generally shanling stuff has more warmth and musical flavour. If m3 ultra was just a bit smaller I'd be all over it, because shanling said it's going to be warmer and still have high technicalities.
Just letting you know fish, ap80 X is solid. Not taking anything away from Shanling's excellent products. It's definitely a size thing for me. I'd be happy with a smaller android dap despite the small screen, nw 105 only has low battery life and output against it. I love the form factor. For now I use phone and ap80x for streaming- I don't do alot but I'm always getting free trials from one of the major players.
And shanling is right about an android dap having a too small of a screen in a tiny player. I just have fascination for tiny daps. Plus you don't use streaming so ap80 px would suit your needs. Oh, and yes it basically uses a hiby OS.