There is no app for PTO.  Yes, it's accessible using a mobile browser but you'd be pushing a bit too far to try to prepare returns on a mobile phone (ok, maybe it's not such a stretch with a full-size tablet, at least theoretically).

Officially, Android is not supported.  Oh, and the rendering on mobile devices is less than ideal, which means you may not be able to access certain input or features (from my personal experience experimenting with it).

You should plan on using PTO with recommended hardware and browsers.

https://proconnect.intuit.com/community/help-articles/help/system-requirements-for-proconnect-tax-on...