Apologies for no sound in the video, the screen recorder doesn’t seem to play well with the audio driver / the daw and I found no way to fix it. But it works and sounds just fine
Is it useless for any practical application? Absolutely. But it is pretty neat if you wanna make patches on the go 
As of now I haven’t found a way to route midi to it through android. But I’m working on it. I may use a midi converter of some sort to convert midi messages to qwerty keystrokes thereby controlling the virtual keyboard
Latency is okay. Buffer size of 256 is as low as I could get it to before audio crackles, that’s 49ms of latency plus whatever input latency android + the emulator has.
It’s running on an emulator called gamehub which you can find forks of on GitHub or on on gamesirs website or on play store (the latter will require you to have a steam account to at least make an emulation container).
Also you need a powerful phone chip. Probably Snapdragon 8 gen 3 or better. Tried a year ago on a sd8gen2 and the CPU just choked up playing one note. I’m using a phone with an 8 Elite processor in the video above. Sound is smooth with no glitches so long as the buffer size is right.
Ableton live 11 should be runnable (not 12). And reaper definitely works as seen in the video.
They also have Waldorf microwave iirc, a virus b/c, and nordlead 2 emulator on the website where the virus TI one is.
Also, RDR2 runs damn great on this emulator with my particular phone model 