There is an official app planned and some people are already working on third party apps, but they all require an API to be present (well, I guess they could get their data via webscraping, but that’s a lot of hassle)

The API has no due data I’m aware of, ernest is probably swamped enough already.

The best you’ve got right now is using it as an unofficial web app. Go to the site and under the menu add it to your Homescreen. The rest will come with time.