mpi オトキコ is a free Android app developed by 株式会社mpi松香フォニックス. It is an excellent educational app for kids that allows them to learn English in a fun and interactive way. The app uses screen codes that can be found in their educational materials and brochures, which can be scanned to access English songs, chants, and videos.

The app's interface is easy to use, and kids will love the colorful and engaging graphics and animations. It is an excellent tool for parents and educators to help kids learn English, as it provides a fun way to practice listening and speaking skills. The app is perfect for kids who are just starting to learn English, as well as those who want to improve their skills further.