Fig. 2From: The fudan tinnitus relieving system application for tinnitus managementGeographical distribution of FTRS app users in ChinaUsers of the FTRS app are unevenly distributed in different provinces of China. The light to dark color block represents different quantitative grades of FTRS users, i.e., 0–500, 500–1000, 1000–2000, 2000–3000, and 3000–5000Back to article page