OTOFLOW: Chord Practice

About

Practice recognizing, hearing and playing chords with OTOFLOW, for ages 13 and above. Use flash drills, note and interval exercises, 5-, 10- or 25-question sets, mistake review and progress records. Explore 288 chords across 12 roots and 24 types. Check notes and theory, then practice the selected chord. Play the screen keyboard or use a compatible MIDI instrument. Hardware and adapters are not included. Assessment does not use microphone recording. Five basic questions are available without a daily limit. Free full sets: one per day for adults; three per day for ages 13–17. Adults on Free may choose a rewarded video for one extra set. No ads for ages 13–17 or Pro. Pro is a monthly auto-renewing subscription with unlimited sets. Review the store-displayed price and period before purchase. Manage cancellation and restore through the purchasing store. No app account is required. Learning stays on your device and can be exported as JSON. No cloud sync. Advertising and purchases require connectivity; offline paid access is limited. UI and chord theory are available in Japanese, English, German, French, Korean, Brazilian Portuguese, Spanish and Hindi. Fingering candidates do not guarantee physical playability. Learning outcomes vary. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/