Only the current version so far — new entries appear as the app ships updates.
筆談用メモ帳+ is a tools app by yab with 10,000+ downloads (about 16K estimated). +111 installs in the last 7 days. Released Mar 29, 2015. Install growth, rank history, SDKs and ad networks.
From the store listing: “It is a super-simple app for disabled people of speech is to show to the other party to enter the character.”