Yann,
The Commons app would need lots of love to continue to be worth advertising as a mainline app. It's not been updated since October, and code rot sets in after a while (I can easily reproduce crashes when logging in with an account that has pre-existing uploads, which it tries to display for convenience but quickly chokes on). With the small app team we have, our focus is mainly on the official Wikipedia apps right now, which are already quite solid and receiving very positive reviews, esp. the Android app. [1] The team is discussing whether the Commons app should be sunset (which would still leave open the option of community maintainership) based on the numbers, and will be posting an update later this week.
Erik
[1] https://play.google.com/store/apps/details?id=org.wikipedia