Solfej: Ear Trainer Theory is a multimedia application available for iPhone. Developed by Shayan Javadi, this free app offers a wide range of lessons and exercises to enhance your music skills.

With over 80 lessons, Solfej covers various aspects of music theory, ear training, and rhythm. The app also provides daily personalized lessons to help you reinforce what you have learned so far.

The exercises offered by Solfej include interval identification, chord identification, perfect/relative pitch note identification, rhythm dictation, and music theory quizzes. From basic notes to complex chords, the app offers lessons suitable for all skill levels.

Solfej promises to add new lessons every month, ensuring that users have a continuous learning experience.

Please note that a subscription to Solfej: Ear Trainer Theory will be charged to your iTunes Account upon confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage your subscriptions and turn off auto-renewal in your Account Settings. Any unused portion of a free trial period will be forfeited upon purchasing a subscription. For more information, please refer to the app's Terms of Use and Privacy Policy.