# ChordFrog: Piano Ear Training — Chord Recognition Quiz Game > Audio-based piano chord recognition quiz game with optional MIDI keyboard integration. (iPhone/iPad app by Skadi Oy.) - Source: https://appshunter.io/ios/app/chordfrog-piano-ear-training/id6775188474 (this page in markdown: same URL + `.md`) - Developer: [Skadi Oy](https://appshunter.io/developer/6775188477) - Category: Music, Education - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.0 · 40 MB - Released: 2026-06-12 - Data updated: 2026-09-04 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/chordfrog-piano-ear-training/id6775188474/reviews.md ## What is ChordFrog? ChordFrog trains your ear to recognise chords by sound — no instrument or extra gear required. Play audio quizzes anywhere, then connect a MIDI keyboard (USB or Bluetooth) whenever you want hands-on practice on real keys. PRACTICE MODES • Leap Quiz — no keyboard needed. Multiple-choice ear training you can do anywhere — on the bus, in a waiting room, whenever you have a few minutes. • Travel Chords — no keyboard needed. An audio chord reference library; tap any chord to hear it. • Challenge — no keyboard needed. Pick up to three chords and ChordFrog builds a short video that plays them, counts down, then reveals the answer. Share it anywhere, or leave it on a cliffhanger and let your friends guess. • My Pond — no keyboard needed. Every chord you have practised, weakest first, with one tap to drill the ones you keep missing. • Lily Pad Drill — with a MIDI keyboard. 10-question scored rounds with up to 100 points. Three tries per chord, so every attempt counts. • Free Pond — with a MIDI keyboard. Play freely and ChordFrog names every chord in real time, including inversions and slash chords. A MIDI keyboard is optional: four of the six modes work entirely on their own, while Lily Pad Drill and Free Pond add hands-on practice when you connect one. SIRI AND SHORTCUTS Ask for a chord and hear it without opening the app — useful when you are already reading a chart. Shortcuts can also identify a chord from its notes, list the chords you find hardest, and start a drill on them. LEVELS Progress through five stages from beginner to advanced: • The Campfire — the most common chords in pop and folk music • The Session — all 12 major and minor chords • The Gig — dominant 7th and major 7th chords • The Studio — minor 7th, sus2, and sus4 chords • The Abyss — everything: diminished, augmented, 7ths, 6ths, and more CHORD VOCABULARY Recognises major, minor, diminished, augmented, sus2, sus4, dominant 7th, major 7th, minor 7th, half-diminished, 6th and add9 chords, including inversions and slash chords. Free Pond also names extended and altered voicings — 9th, major 9th, minor 9th, 13th, minor 11th and altered dominants — and it reads a seventh chord voiced without its fifth, the way players actually voice one. FREE, WITH ONE OPTIONAL PURCHASE ChordFrog is free and nothing is gated. It is supported by a banner on the menu and one full-screen ad after a completed round; a single Remove Ads purchase takes both away if you would rather not see them. Designed for pianists, guitarists, singers, producers, and songwriters who want sharper ears. ## Key features - Audio chord recognition quizzes - Multiple-choice ear training - MIDI keyboard support (optional) - Real-time chord naming - Progressive learning levels - Extensive chord vocabulary ## Frequently asked questions about ChordFrog ### What is ChordFrog? ChordFrog is a mobile game designed to train your ear for recognizing piano chords by sound. It offers audio quizzes and optional hands-on practice with a MIDI keyboard. ### Can I use ChordFrog without a MIDI keyboard? Yes, the Leap Quiz and Travel Chords modes work entirely without a MIDI keyboard. These modes focus on audio recognition and chord reference. ### What types of chords can ChordFrog recognize? ChordFrog recognizes a wide variety of chords including major, minor, diminished, augmented, sus2, sus4, dominant 7th, major 7th, minor 7th, half-diminished, 6th, and add9 chords, along with their inversions and slash chords. ### How does the progression system work in ChordFrog? ChordFrog features five learning stages, starting from 'The Campfire' for common chords and progressing to 'The Abyss' which covers all advanced chord types, including inversions and slash chords. ### Does ChordFrog have ads? Yes, ChordFrog contains advertisements. As a free application, ads are displayed to support its development and availability. ### What devices is ChordFrog available on? ChordFrog is available on iPhone and iPad devices, as indicated by its supported devices list. ### How often is ChordFrog updated? ChordFrog was last updated on June 26, 2026, indicating a recent update. The app's version is 1.0.1. ### What is the age rating for ChordFrog? ChordFrog has an age rating of 4+, making it suitable for a wide range of users interested in learning about music. ## Version history (last 5 releases) ### 1.2.1 — 2026-08-30 Remove Ads is now available. One payment removes the banner and the full-screen ad after rounds — the app stays free, and nothing is gated either way. If you looked for it in 1.2 and could not find it, sorry about that — this is the release that actually delivers it. ### 1.2 — 2026-08-25 Remove Ads is here. One payment removes the banner and the full-screen ad after rounds. The app stays free and nothing is gated either way. ChordFrog now answers Siri and Shortcuts without opening: - "Play C major seven in ChordFrog" sounds the chord while you stay on your sheet music. It no longer takes over the screen. - Identify a chord from MIDI notes, and get the answer back. - New Shortcuts actions return values you can pass on: the notes in a chord, your weakest chords, and how well you know any single chord. ### 1.1 — 2026-08-19 Send a chord challenge to a friend. Pick up to three chords and ChordFrog turns them into a short video: the chords play, a countdown runs, then the answer — or not, if you would rather your friends guess in the comments. Share it wherever you like. You can also make one straight from a finished Leap Quiz round, built from the chords you missed. My Pond shows what your ear has actually learned. Every chord you have practised, weakest first, with a one-tap drill of the ones giving you trouble. Free Pond understands more of what you play. Voicings that leave out the fifth are now named properly instead of coming up blank, and it recognises ninths, elevenths, thirteenths and altered dominants. Ask Siri to start a drill, practise your weakest chords, or tell you how your ear training is going. ### 1.0.5 — 2026-08-01 Two stability fixes. Connecting a MIDI keyboard and playing your first notes could make ChordFrog quit unexpectedly — that's fixed. So is a crash when a phone call or alarm interrupted your practice. The pond stays calm no matter what. ### 1.0.3 — 2026-07-28 Small tidy-up release: we removed a leftover developer diagnostics switch from Settings. All the 1.0.2 goodness — true-to-name reference chords, steadier Leap Quiz scoring, VoiceOver-friendly piano keys, and gentler motion — stays exactly as it was. ## More apps by Skadi Oy - [Vidona](https://appshunter.io/ios/app/vidona/id6783470877) All apps by Skadi Oy: https://appshunter.io/developer/6775188477 ## Related topics [ear trainer chord](https://appshunter.io/ios/topics/ear-trainer-chord) · [ear training chords](https://appshunter.io/ios/topics/ear-training-chords) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*