Free iOS App for Musicians
Quiz Chords.
Practice Harmony.
Train your ears, improvise over any chord, and explore harmony — all in one app. For every instrument. Every level. No account needed.
Three Modes. One System.
Learn. Test. Apply.
ChordChaser isn't just another theory app. It's a complete system for practicing harmony in motion — from recognizing chords by ear to improvising over them in real time.
🏆 Quiz Mode
How fast can you
name that chord?
Hear a chord. Identify it. Get faster. ChordChaser's Quiz mode turns ear training into an addictive game with multiple quiz types, three difficulty levels, and a Survival mode that gets harder as you level up.
- 8 quiz types — from basic triads to all chord types
- Survival mode with levels from Warm-up to God Mode
- Custom Quiz — pick exactly which chords to train
- Scoreboard to track your progress
🎲 Randomizer
The practice engine
you've been missing.
Real music doesn't give you time to think. The Randomizer throws chords at you — at your tempo, with your settings — so you learn to react, not just recognize. This is where ear training becomes real playing.
- Built-in presets: II-V-I, Blues, Rhythm Changes, and more
- Fixed patterns: Circle of Fifths, Chromatic, Whole Tone
- Set duration using BPM/bars or seconds per chord — your choice
- Session timer for focused practice blocks
🔍 Single Chord Mode
Know every chord.
Inside and out.
Select any chord and see its notes, matching scales, and how it sounds — then play it yourself on the built-in virtual piano. It's your harmonic reference tool and instrument in one.
- Chord tones + matching scale for every chord type
- Instrument Mode — play chords yourself in real time
- Arpeggio playback and Piano Roll visualization
- Perfect preparation before hitting the Randomizer
Built for Real Musicians
Is ChordChaser for you?
Music Students
Sharpen your ears and build harmonic awareness. Use Quiz mode daily to train chord recognition, then apply it in the Randomizer.
Hobby Musicians
Improvise with confidence over any chord. No theory degree needed — just pick a preset and start playing along.
Pro Musicians
A serious practice tool for harmonic fluency. Customize everything — chords, tempo, patterns — and push your limits in Survival mode.
Music Educators
Zero-friction classroom tool. No accounts, no setup, works offline. Set up a configuration and let students practice immediately.
Works on iPhone & iPad
Practice anywhere.
ChordChaser adapts to your screen. Use it on your iPhone during commutes, your iPad in the practice room, or even Apple Vision Pro.
For Teachers & Schools
The easiest way to bring
ear training to class.
No accounts. No setup. No cost. Students download ChordChaser and start training immediately. Use it for classroom exercises, homework assignments, or warm-ups before ensemble rehearsal.
Free
No cost for students
Offline
Works without WiFi
No Accounts
Zero friction
All Instruments
Bb & Eb transposition
Who Is ChordChaser For?
Built for how musicians actually practice.
Whether you're studying jazz at a conservatory, jamming in your bedroom, teaching a class of 30, or gigging five nights a week — ChordChaser fits into your routine.
Music Students
Ear training is the foundation of musicianship, but most tools make it feel like homework. ChordChaser turns chord recognition into a fast, addictive game. Start with Easy triads, work your way up to Pro-level extended chords, and track your progress on the Scoreboard.
Then take what you've learned into the Randomizer — where chords change in real time and you have to react, not just recognize. It's the bridge between theory class and the practice room. Use it daily for 10 minutes and you'll notice the difference within a week.
Hobby Musicians
You play guitar, keys, or bass — maybe in a band, maybe just for yourself. You know some chords, but improvising over changes still feels like guesswork. ChordChaser gives you a safe space to practice reacting to harmony without needing a band or a backing track.
Pick a preset like Blues or II-V-I, set a comfortable tempo, and just play along. The Randomizer throws chords at you so you learn to move between them naturally. No theory degree required — just your instrument and a willingness to experiment.
Professional Musicians
You already know your chords. What you need is a tool that pushes your limits — that forces you to react faster, over harder changes, in less familiar keys. ChordChaser's Randomizer is built for exactly this. Customize every parameter: which roots, which chord types, how fast they change.
Use Fixed Order patterns like Circle of Fifths or Chromatic sequences to drill specific technical challenges. Push yourself in Survival mode where the time limit shrinks as you level up — from Warm-up all the way to God Mode. It's the practice tool that grows with you.
Music Educators
Getting students to practice ear training consistently is one of the hardest parts of teaching. ChordChaser removes every barrier: it's free, requires no account, works offline, and takes less than a minute to set up. Students download it and start training immediately.
Use it for classroom warm-ups, homework assignments, or ensemble prep. Set a specific Quiz type for the week, or configure the Randomizer with the chords from an upcoming piece. The app supports Bb and Eb transposition, so trumpet, sax, and concert-pitch students can all use it together.
Questions & Answers
How, why, and when to use ChordChaser.
What exactly is ChordChaser?
+
ChordChaser is a free iOS app that combines ear training, improvisation practice, and chord exploration into one tool. It has three modes: Quiz (identify chords by ear), Randomizer (practice improvising over changing chords in real time), and Single Chord (explore any chord's notes, scales, and sound). Think of it as a practice partner for harmony.
How is this different from other ear training apps?
+
Most ear training apps stop at recognition — you hear a chord, you name it, done. ChordChaser goes further. After training your ears in Quiz mode, you apply that knowledge in the Randomizer, where chords change at your tempo and you have to react in real time. It's the difference between studying flashcards and actually speaking the language.
Do I need to know music theory to use it?
+
Not at all. Start with Quiz mode on Easy — you'll hear major and minor chords and learn to tell them apart. The app teaches through doing, not lecturing. As your ear develops, you'll naturally want to explore harder quiz types and the Randomizer. ChordChaser meets you where you are.
What instruments does it work with?
+
All of them. ChordChaser is instrument-agnostic — it trains your ears and harmonic awareness, which applies to any instrument. It also supports Bb and Eb transposition for trumpet, saxophone, and other transposing instruments, so the chords display in your instrument's key.
When should I use each mode?
+
Use Quiz mode to warm up your ears (5 minutes is enough). Use Single Chord mode when you encounter a chord you don't know — study its notes, hear it, play it on the virtual piano. Use the Randomizer for your main practice session — it's where you build real fluency by reacting to harmony as it changes.
How much time should I spend on it?
+
Even 10 minutes a day makes a difference. A solid routine: 5 minutes of Quiz to activate your ears, then 5-10 minutes of Randomizer to apply what you know. For deeper sessions, add Single Chord exploration before the Randomizer. Consistency beats duration — short daily sessions outperform occasional long ones.
Is it really free? What's the catch?
+
It's genuinely free with no ads, no data collection, and no account required. The developer (Anders Larson, a professional trombonist and educator) built it as a tool he wanted for his own students and practice. Premium features may be added in the future, but the core app will always be free.
Can I use it in my classroom?
+
Absolutely — it's designed for it. No accounts means zero admin overhead. Students download the app and start immediately. It works offline, so school WiFi issues don't matter. You can assign specific Quiz types for homework or configure the Randomizer with chords from repertoire you're working on.
Does it work offline?
+
Yes, 100%. All sounds and features are built into the app. No internet connection needed — use it on the subway, in a practice room, on a plane, or anywhere else.
Free
No subscription needed
27 MB
Lightweight download
100%
Works offline
Zero
Data collected
Ready to chase
some chords?
Download ChordChaser for free. No account, no ads, no catch. Just open it and start playing.
Available on iPhone, iPad, iPod touch & Apple Vision Pro