People, including me, would upload a lot of more media if they could upload it directly from the mobile app. Also, it would need support in the Android and iOS share buttons and options.
Hi @Quasipodo ,
The Android app for this does exist at https://play.google.com/store/apps/details?id=fr.free.nrw.commons . It supports the 'share' option, you can browse through your gallery, click 'share' and select our app from the list of potential apps displayed.
I think you can also find the iOS app at the link that Aklapper mentioned, but I am not so familiar with that.