音感検定アプリ おとあて is a free multimedia application developed by Sony Music Entertainment Japan Inc. It is designed to help users train their ears and improve their musical sense. With its simple yet challenging gameplay, this app is perfect for both beginners and experienced musicians.

The app features a quick and accurate sound recognition game, where users have to tap the button they think corresponds to the randomly played note from the do-re-mi-fa-so-la-si scale. Users compete against the clock to answer 10 questions correctly.

For those looking for a greater challenge, there are five different game modes with varying difficulty levels. By clearing the easier game modes, users can unlock and try their skills in the more challenging ones.

In addition to the gameplay, the app also offers a certification system based on users' game scores. The higher the score, the higher the certified level of musical sense. Users can share their certification results on social media platforms like Facebook, Twitter, and LINE.

Furthermore, there is a multiplayer mode called "おとあて対戦" where users can compete against friends, family, or anyone interested in a musical showdown.

Overall,音感検定アプリ おとあて is a feature-packed and engaging app that not only helps users improve their musical sense but also provides an enjoyable brain training experience.