電話帳ナビ-迷惑電話と迷惑メッセージを自動判別で強力ブロック is a communication app by RIDE AND CONNECT,INC. with 1,000,000+ downloads (about 2.5M estimated). +6.2K installs in the last 7 days. Rated 4.6 from 33K ratings. Released May 24, 2012. Install growth, rank history, SDKs and ad networks.
From the store listing: “Phonebook Navi is a free app that displays information retrieved from Phonebook Navi even for numbers not registered on your smartphone. Compared to carrier-provided spam call blocking apps, it offers significantly more information and higher accuracy in its detection, displaying not only spam call information but…”