If you’ve ever picked up a ukulele and immediately felt lost staring at a chord chart, you know the frustration. There’s a gap between seeing a chord name and actually knowing what to do with your fingers — and most apps either overwhelm you with too much or give you too little.
I built this app because I kept reaching for my phone mid-practice to look up the same chords over and over, only to land on websites that were slow, ad-heavy, or required an internet connection I didn’t always have. I wanted something fast, clean, and genuinely useful for someone still building their chord vocabulary.
The app is called 우쿨렐레 코드 도우미 in Korean — roughly “Ukulele Chord Helper” — and it covers 35 of the most commonly used chords for standard GCEA tuning. That includes majors, minors, dominant 7ths, major 7ths, minor 7ths, and a handful of sus chords. Each chord comes with a fingering diagram, finger number indicators, barre markings, and actual playable sound.
What it does
- 35-chord reference library: Browse or search chords by name, filter by category (major, minor, 7th, etc.), and mark favorites for quick access. No internet needed — everything works fully offline.
- Synthesized ukulele audio: Rather than pre-recorded samples, the app generates chord sounds in real time using a Karplus-Strong string synthesis algorithm tuned to GCEA reentrant tuning. You can replay any chord as many times as you want without any gaps or loading delays.
- Three quiz modes: Test yourself by identifying a chord name from a diagram, identifying a chord name by ear from the sound alone, or choosing the correct diagram for a given chord name. It covers the full range of ways you might encounter a chord in the wild.
- Learning statistics: The app tracks your session count, overall accuracy, and per-category performance over time, with a recent score trend graph. Stats can be exported and restored as a JSON file, so you don’t lose your progress.
- No account, no subscriptions, fully offline: There’s no login, no sign-up, and no features locked behind a paywall. The app is ad-supported, but nothing else requires payment.
The quiz modes are where I think the app earns its keep. Recognizing a chord diagram is one skill; recognizing a chord by sound is a completely different one. Having both in a single app — alongside the reference material — means you can move back and forth between studying and testing yourself without switching tools.
Who it’s for
This is aimed squarely at ukulele beginners and self-directed learners who want a reliable offline reference they can actually practice with — not just read from. It’s also useful for intermediate players who know most chords by muscle memory but occasionally need to look something up quickly without opening a browser. If you teach ukulele informally and want a lightweight tool to demonstrate chord shapes, it fits that use case too. The app supports both Korean and English, so it works regardless of which language you prefer.
If you’re learning ukulele and want a chord reference that doubles as a practice tool, give it a try on the App Store. Version 1.0 is live now.
App Store에서 다운로드: 우쿨렐레 코드 도우미
Official page: reactiveworks.dev/apps/6765823755
Update history: ahngo13.github.io
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