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Free all-in-one music toolkit for every instrument. Find the chords of any song, keep them in an editable notebook, play them. 168 chords detected on your device, a tuner, a keyboard — free in your browser.

Website, pricing, platforms and company facts side by side.
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| Website | codegres.org | jam-jam.org |
| Pricing | — | |
| Company | — | Startup from France · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Codegres.org yet.
Jam Jam is a free, all-in-one companion for musicians. It bundles a chord & lyrics notebook, real-time chord detection from your microphone, an online piano keyboard with USB MIDI support, a precise chromatic tuner (guitar, ukulele, bass, violin and more), a composer and full backing tracks....
What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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As answered by people managing Codegres.org and Jam Jam.
Jam Jam's answer:
Jam Jam bundles in one free app what usually takes five: a chord & lyrics notebook, real-time chord detection from the microphone, an online piano with USB MIDI support, a precise chromatic tuner for 9+ instruments, a metronome and full backing tracks. Everything is privacy-first: audio is analysed directly on your device and never uploaded, and the built-in automatic assistant works offline. You can start in the browser with no sign-up.
Jam Jam's answer:
Most alternatives do one thing (a tuner, OR chords, OR tabs) and lock the rest behind a subscription. Jam Jam is genuinely free across the whole toolkit, with one optional Premium (€3/month) that removes minimal ads and heavy-use limits - same price everywhere, web and mobile. It also respects your privacy by design: no audio ever leaves your device, no tracking, EU-hosted accounts, and your songbook works offline.
Jam Jam's answer:
Hobbyist and intermediate musicians - guitarists, pianists, ukulele/bass/violin players - who play songs for fun, jam with friends or accompany singing, and want one simple, free toolbox instead of juggling several apps. It also fits music teachers and beginners learning their first chords.
Jam Jam's answer:
Jam Jam started as a personal tool: one musician-developer tired of switching between a tuner app, a chords website and paper songbooks during jam sessions. It grew into a full companion - notebook, detection, keyboard, composer - built with an offline-first, privacy-first philosophy: your music practice shouldn't require an account, an upload, or a paywall to get started.
Jam Jam's answer:
Jam Jam's answer:
Individual musicians and music students - Jam Jam is a consumer product, not an enterprise tool
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