Stop finishing drills you can't apply. Hear scale degrees in any key.
You've done EarMaster. You got to the end. You still can't figure out the melody of a pop song by ear. That's not your fault — it's because every app teaches intervals in a vacuum, not in the key. Fifths teaches them in key, then shows you exactly what you keep missing.
Free to try, no signup · Cancel anytime · 14-day refund · No ads, ever
Practice that matches what you actually do at a piano.
When you're figuring out a song, you're not naming intervals — you're asking "is this the 3? the 5? the flat 7?" We train that skill, directly.
How it works
Every drill lives in a key, with a drone.
Your ear learns "what scale-degree 3 sounds like," not "what a minor 3rd sounds like in a vacuum." That's why songs click, and vacuum-drills don't.
Every answer logs which degree, which direction, which key.
You build a map of exactly which patterns you miss — not "your accuracy was 78%."
Auto-generated sessions drill the gaps.
The patterns you miss in songs are the patterns we drill next. No more guessing what to practice.
Built to make songs clickable
Scale-degree-first training
The whole point. Every drill has a key. No floating intervals.
Drone context for every drill
Tonal center in your ear while you identify. The method that actually transfers to songs.
Matrix shows the pattern
Not just "you got 78%." See which degrees keep tripping you up.
Web, any browser, no install
Practice on your laptop, phone, or tablet. Progress syncs across devices.
How Fifths compares
The apps below are good. But if you've done them and still can't hear songs, you know the problem isn't "you didn't finish enough drills."
| EarMaster | Perfect Ear | Fifths | |
|---|---|---|---|
| Price | $3–6/mo | Free (ads) / $5 | $4.99/mo |
| Scale-degree in-key drills | limited | ✗ | ✓ primary method |
| Drone / tonal context | optional | ✗ | ✓ built in |
| Shows you what you miss | ✗ | ✗ | ✓ |
| Works on web (no install) | desktop app | mobile only | ✓ anywhere |
| Ads on free tier | — | yes | never |
| Total lessons at launch | 2,500+ | hundreds | ~30 (growing) |
Frequently asked
I've done EarMaster. Why didn't that work?
Because almost all interval drills play notes in a vacuum. Real songs have a key. Without that reference, intervals sound different every time you hear them. We put the key back in. That's the whole trick.
How long does it take to hear scale degrees?
Most people get reliable 1-3-5 (the tonic triad) in a week of 15-min/day practice. All 7 scale degrees in 4–6 weeks. The matrix shows you when you're getting close.
Do I need perfect pitch?
No. This is pure relative — scale degrees in a given key. Perfect pitch isn't required and isn't taught.
Is there a free tier?
Yes, forever. No ads, ever. Full baseline curriculum and 7-day analytics. Pro unlocks unlimited history, mic input, and auto-drill.
When does it launch?
Live now at app.fifths.io. The $99 lifetime is reserved for the first 100 seats; once they're claimed, the tier closes forever.
Pricing — fair and clear
Free forever. Pro unlocks unlimited history, weak-item drill sessions, and mic-input scoring.
- Full curriculum
- Last 7 days of stats
- No signup needed
- Unlimited history
- Weak-item drill sessions
- Mic-input pitch scoring
- Everything in Pro Monthly
- ~$3.33/mo equivalent
- Cancel anytime
- All Pro features, forever
- Future curriculum included
- Closes after 100 sales
Cancel anytime · 14-day full refund · No ads, ever
Songs should click.
Practice for free at app.fifths.io — no signup needed for the first lessons.
Want the lifetime tier instead?