Follow any exercise with a colour-coded neck and a click, anywhere, with no setup. Add a mic and Fretmetric scores every note and turns the results into tomorrow's plan.
Try it now
Turn on your mic and pick any string. Fretmetric names the note, its tuning to the cent, and how cleanly it started, right here in the browser. Nothing is recorded or sent anywhere.
Turn on your mic, then play a note
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pitch
Notes detected
Every note, judged
Pitch and timing for every note, against the click, in real time. Green is right and on time, violet is early or late, pink is missed.
Clean BPM
Clean BPM is the fastest tempo at which you play an exercise accurately and in time. It only goes up when you earn it.
Clean BPM · Alternate picking, one note
118+22 in 6 weeks
One takeaway per chart, computed in code: “Clean BPM up 22 in 6 weeks.”
How it works
Ten minutes to set up. After that, open the app and press Start.
Two minutes: your input's delay, your room's noise floor, and a tune-up. This is what makes timing scores trustworthy.
An 8–10 minute battery measures timing, speed, accuracy, finger independence, fretboard, bends and ear.
Each day's session is built from your numbers: warm-up, interleaved focus work, spaced reviews and one game.
Clean BPM, timing and skill charts, weekly reports, and forecasts for the goals you set.
What's inside
73 measured exercises, from chromatic warm-ups to sequences, legato, bends and vibrato. All generated from rules, never by an AI.
The engine weighs your goal, your measured gaps and how sure it is about each skill, then explains every pick.
Picking speed is 41 against a target of 65
Due 2 days ago, last played at 96 BPM
Fretboard is at 38, one of your biggest gaps
Every result carries a confidence level. Low-confidence sets are shown but never count against you, in trends or rankings.
Six short games, each a measured exercise with a scoreboard. The daily challenge is the same for every player.
What moved, what didn't, and what next week leans toward. Every number comes from your data, never from a guess.
Alternate picking, one note: up 12, from 96 to 108 BPM.
On average your notes landed 8 ms behind the click. Lead each note with the picking hand.
Name a song or an exercise and a target tempo. After eight sessions, a fitted curve says whether you're on track.
140 BPM projected in 5 to 7 weeks, inside your due date.
Ask why you're stuck or whether you're rushing. Answers use your own measurements, and it never guesses about pain.
Am I rushing?
This week your notes landed 8 ms behind the click on average. You're dragging slightly, not rushing.
For teachers
Studio links your students' accounts, with their consent. Assign exercises, see minutes, practice quality and Clean BPM, and spend lesson time where it counts.
| Student | This week | Quality | Assigned: pentatonic 2 |
|---|---|---|---|
| Student A | 94 min · 5 days | 82% | 104 BPM ▲ 8 |
| Student B | 31 min · 2 days | 64% | 88 BPM, holding |
| Student C | 0 min | -- | Not started |
Measured, not guessed
±10¢
Pitch accuracy across the neck, low E to high E, on synthesised plucks at 44.1 and 48 kHz.
97%+
Of note onsets found within 10 ms in 16th-note runs up to 200 BPM, in automated tests.
0
Low-confidence sets that count against you. They're shown, flagged and left out of trends.
Pricing
One-click cancel, a reminder before annual renewals, and no dark patterns.
The full adaptive engine, every game, lifetime history.
$59.99a year
$5 a month, billed yearly
Start free: Pro is unlocked in betaFor teachers: assignments and student dashboards.
$19a month
Includes 15 students
Set up a studioPayments open at public launch. Until then every account gets the full Pro experience, free. No card, no auto-renewal.
FAQ
The fastest tempo at which you played an exercise with at least 92% of notes right and timing within 12% of the note spacing, on an input Fretmetric trusts. It only goes up when you earn it, so it's a number you can believe.
No. Pitch and timing are analysed in your browser, on your device. Only small summaries (tempo, accuracy, timing error) are saved to your account. Recordings for then-vs-now comparisons are opt-in and stay in this browser.
Just a guitar. Without a mic you follow along: every exercise shows the fingers and strokes with a click to play to, and nothing is scored. To track your playing, any microphone works: a laptop mic is fine in a quiet room, and a USB audio interface gives the most precise timing. Wired headphones help; Bluetooth adds delay, so timed scoring is switched off on Bluetooth unless you override it.
A two-minute calibration measures your setup's delay against a click, and the noise floor of your room. Every result carries a confidence level. Low-confidence sets are shown but never count against you, in trends or in rankings.
It reads your measured skills, your goal and how many minutes you have, then builds a session: warm-up, focus work interleaved in short blocks, spaced reviews of what you've mastered, and one arcade game. Every item says why it was picked. Tempos climb only after two clean sets in a row.
Code computes every number and builds every plan. AI can write the weekly summary and answer questions, but only using numbers it is given, and a validator rejects any number that isn't in your data. Everything works fully without AI.
Yes, with Studio. Students join with a code and consent to share summaries: minutes, practice quality, Clean BPM on assigned exercises. You assign work and see who practised between lessons.
Yes, in one click from Settings, with no retention maze. Annual plans get a reminder email 7 days before renewal. There are no lifetime deals and no paid streak repairs.
Mobile app
Your plan, your exercises and your Clean BPM, in an app built for your phone. Until then, Fretmetric runs in your phone's browser.
Create a free account, calibrate in two minutes, and play your first measured set today.