Only the current version so far — new entries appear as the app ships updates.
Mensa Duisburg/Essen is a food & drink app by Mensaplan with 1,000+ downloads (about 2K estimated). Released Nov 28, 2013. Install growth, rank history, SDKs and ad networks.
From the store listing: “Cafeteria plan for Duisburg, Essen, Bottrop and Mülheim”