ChordIQ vs Contrapunctus

ChordIQ teaches sight-reading, ear training, rhythm, singing and music theory through interactive games. It offers more than 30 modes covering reading, chords, scales, theory, ear training, singing and rhythm. Reading practice includes treble, bass, alto and grand staff, key signatures, note values, rests, and Marathon and Survival runs. Ear exercises cover intervals, chords and notes by ear, perfect pitch, solfège scale degrees and melodic dictation. Players can tap written rhythms across ten complexity levels, echo heard rhythms, or sing or play pitches scored with a live cents meter. Supported instruments are piano, guitar, ukulele and bass, with on-screen keyboard or fretboard input in playing modes. External class-compliant MIDI keyboards work on iOS and Android; iOS supports wired or Bluetooth MIDI, while Android uses USB OTG. Scores appear on the World Chart leaderboard, with separate rankings for each mode. ChordIQ runs on Android, iOS and macOS. Its free plan includes most game modes, with ads between rounds. Pro is available as yearly and weekly subscriptions or a one-time lifetime purchase; prices vary by country and appear in the store before purchase.

Contrapunctus is a free web platform for music theory, composition, and counterpoint study. Its real-time editor shows Roman-numeral and chord analysis while users write, and identifies part-writing errors and non-chord tones. Compositions can use multiple voices, major, minor, or modal contexts, and sampled-instrument playback. The platform includes an interactive edition of Fux’s Gradus ad Parnassum, with species-counterpoint lessons, an AI tutor, and English and Latin text. Community members can create and solve exercises, share solutions, vote, and earn points toward a 15-rank ladder. Educators can create classes, assign lessons, review submissions, and track scores and class averages in a gradebook. Accounts use email or Google, with projects and activity synchronized across devices. Plain and compressed MusicXML can be imported, but MusicXML or MIDI export is not yet shipped. Some imported details may be simplified or dropped, and tutor free-form questions are limited to 25 per account per rolling hour.