my-oto-mo is a free educational application designed for iPhone users, enabling the playback of audio tracks associated with Gakken's language textbooks. The app features adjustable playback speeds ranging from 0.5 to 2.0 times, as well as an AB repeat function, making it a valuable tool for language learners. Users can select specific tracks to listen to, eliminating the need for a CD player and enhancing the convenience of studying on the go.

Additionally, the app supports speaking exercises from compatible textbooks, allowing users to assess their pronunciation and record their voice for playback. Registration with a Gakken ID is required for accessing recorded audio features. With my-oto-mo, users can seamlessly integrate audio resources into their English learning journey anytime and anywhere.