We are releasing our first Android app called Momentum very soon.
https://momentum.cakewalk.com/ (It will be called Momentum Music on the Play Store)
It is the ultimate DAW companion since there is a plugin (VST2/VST3/AU/AAX) for the same that you can use in any DAW. The plugin supports bidirectional transfer to and from the DAW as well as host timeline sync.
Its the perfect app to capture ideas on the go or even when rehearsing since you can record anywhere and fly ideas back to the DAW instantaneously. There is nothing out there on Android or iOS that handle back and forth with a DAW this effortlessly.
Coupled with a good USB microphone you can get very good recordings. I use it with an iPad and the Shure MV-88 and the quality is really good. With headphones I am able to input monitor and record with pretty low latency.