Abstract: Four main sets of features designed to improve the apartment rental and listing process are discussed: (i) improved visualization of listings for renters using clustering, especially for mobile; (ii) landlord transaction flow and support; (iii) cross-checking of data using user-initiated third-party web data; and (iv) maintenance flow and support. The clustering approach provides visualization of dynamically developed clusters from available listings; rapid (re-)computation of clusters as the map is adjusted by users; and representation of all matching listings in the region in a cluster or as a single entry cluster at all times.