Only the current version so far — new entries appear as the app ships updates.
電子書籍ήχος（イーコス）- 読み上げ対応リーダー is a books & reference app by Dignicate, LLC with 10+ downloads (about 30 estimated). Install growth, rank history, SDKs and ad networks.
From the store listing: “A text-to-speech app for English learners that lets you enjoy reading English books (no login required). You can also play each phrase and adjust the playback speed with a tap.”
