I understand and just want to get feedback before getting to work. The app actually exists and is live, can be found here : https://play.google.com/store/apps/details?id=com.meritum . I wasn't posting link to it because it is in Polish so most of users wouldn't understand it anyway.

However, as you can see we have 90% of things done, just need to adjust backend and some UI things in the apps to Steem.