Pricing
Start free, upgrade when you need more power
No card needed. The free plan never expires.
The Crystal — tonic, modes, chords. Free on every plan
What you spend
1 credit1 bara song ≈ 100 credits
Credits are spent only on bars changed since the last harmonisation: rewrite two bars and you pay for two, not for the whole song. The monthly grant refreshes on your renewal date, and credits bought in packs never expire.
How many songs a month do you write?
8a month
Credits needed per month
800 credits
You need Plus — 1,500 credits for $15 a month.
$15one-time
90 real days of the paid plan. After that $9 a month for as long as you stay. Cancel in one click, access until the end of the paid month.
$39for 12 months
$39 for twelve months instead of $108, and that price is locked for as long as the subscription lasts.
The Crystal, notation, instruments and theory are the same on every plan.
Get started with basic music theory tools
Free
Permanent, no card
100credits a month
≈ 1 songfree
No card needed
For self-taught musicians and hobbyists
$12/mo
$144 a year in one payment · −20%
1,500credits a month
≈ 15 songs1.00 ¢ per bar
Sign up first, pay after
For serious musicians and music teachers
$18.33/mo
$220 a year in one payment · −20%
3,000credits a month
≈ 30 songs0.77 ¢ per bar
Sign up first, pay after
Ran short once? Don't change the plan
Credit packs are bought from your account and never expire at the end of the month.
The table can be dragged sideways — the names column stays in place
| Feature | Free | Plus | Pro |
|---|---|---|---|
| Harmonization | |||
| Credits per month | 300 | 1,500 | 3,000 |
| Price per bar | Not included | 1.00 ¢ | 0.77 ¢ |
| Harmony versions at once | 1 | 2 | 5 |
| Requests per day | 10 | 30 | 100 |
| Charged only for changed bars | Included | Included | Included |
| Notation and export | |||
| Bars in notation | 12 | Unlimited | Unlimited |
| MusicXML imports per month | 3 | Unlimited | Unlimited |
| Export formats: MIDI, MusicXML, JSON | Included | Included | Included |
| Widgets and workspace | |||
| Crystal, fretboard, keyboard, notation | Included | Included | Included |
| Transposition and modes | Included | Included | Included |
| Metronome and tuner | Included | Included | Included |
| Widgets | 3 | 10 | Unlimited |
| Presets | 5 | 15 | Unlimited |
| Markers | 3 | 7 | 11 |
| Own assemblies | Not included | 5 | 20 |
| Learning and voice | |||
| Challenges per day | 30 | 300 | Unlimited |
| Voice minutes per month | Not included | 10 | 60 |
| Live lessons | Coming soon | Coming soon | Coming soon |
Cancel in one click
From your account, without emails or phone calls. Access and credits stay until the paid period ends.
Free without a card
We ask for card details only when you pick a paid plan. There are no hidden charges.
The seat counter is real
It shows subscriptions that were actually taken and refreshes once a minute. There are no fake timers on this page.
You pay only for what changed
Rewriting two bars costs two credits, not a recount of the whole song. Playback, transposing and note editing never spend credits.
Signing up takes a minute and the monthly credits land straight away. The plan decision can wait.
If you buy a plan, we may email you about similar TerryTrilla products. You can refuse at any time — from any email or in your settings. Email preferences