Ear training for conservatory students and serious amateurs.
Sight singing. Functional analysis. Hearing voice leading across whole phrases. With analytics that show which intervals, which chord functions, and which modulations keep catching you.
Free to try, no signup · Cancel anytime · 14-day refund · No ads, ever
Your solfege stays honest when the metrics do.
Every answer you give the app becomes a data point. Patterns emerge that self-practice doesn't surface.
How it works
Diatonic first, modulation next.
Every drill lives in a real key with functional context. Secondary dominants, modulation, and modal interchange are all taught in the key that frames them.
Matrix tracks function, not just notes.
Solfege accuracy, chord-function confusions, cadence-point errors — all visible after every session.
Weak-spot drills built from your data.
Targeted sessions on the specific functions, keys, and cadences where your ear still wavers.
For ears already trained
Solfege-aligned scale degrees
Movable-do by default, fixed-do as a setting. Your solfege system, honored.
Roman-numeral chord function
Chords labeled I, ii°, V7, Neapolitan. Hear functions, not just notes.
Sight-singing with mic scoring
Cents-accurate pitch tracking on single-voice passages. Multi-voice post-launch.
Vocal range aware
Set your comfortable range; drills transpose. Free.
How Fifths compares
Classical ear training tools exist. Most are 20-year-old desktop software or locked-away conservatory apps. We're neither.
| EarMaster | Auralia | Fifths | |
|---|---|---|---|
| Price | $3–6/mo | $~250 one-time | $4.99/mo or $99 lifetime |
| Roman-numeral chord labels | partial | ✓ | ✓ |
| Movable-do + fixed-do | limited | ✓ | ✓ |
| Sight-singing mic scoring | limited | ✓ | ✓ beta |
| Works on web (no install) | desktop app | desktop app | ✓ |
| Per-function matrix analytics | ✗ | ✗ | ✓ |
| Total modules at launch | 2,500+ | 1,000+ | ~30 (growing) |
Frequently asked
Does this support movable-do?
Yes, by default. Fixed-do is available as a setting. Your solfege system, your call.
Does it work for choral sight-reading?
Single-voice at launch. Multi-voice (SATB passage scoring) is on the post-launch roadmap — 3–6 months out.
How does the functional-analysis work?
Chords are labeled with Roman numerals in context (I, ii°, V7/V, bII — even Neapolitans and augmented sixths at higher levels). The matrix tracks which functions you mis-identify most often.
Is there a free tier?
Yes. Full baseline curriculum + 7-day analytics. Pro adds advanced modules, 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, advanced modules, and mic-input scoring.
- Baseline curriculum
- Last 7 days of stats
- No signup needed
- Unlimited history
- Advanced modules + auto-drill
- 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
Solfege is honest. Measure it.
Practice for free at app.fifths.io — no signup needed for the first lessons.
Want the lifetime tier instead?