Privacy Policy
Last updated 13 October 2026
The short version
Microphone audio stays on your device. MIDI and MusicXML files are read in your browser. We store practice results, account details, preferences, and files you choose to save.
Your microphone
Pitch detection runs in the page. Audio is not recorded, uploaded, or stored. Recorded Premium scale and guided Studio sessions store target notes, measured pitch error, completion, string, finger, and position. Silence and unmeasured targets are identified separately. Analytics use those results.
Your music files
MIDI and MusicXML files are parsed in your browser. They reach our server only when you save a piece privately or submit it for public review. Approved submissions publish the score, title, description, composer, attribution and source license. Review notes and your account email are not public. Anyone can report a public score; we store the report text for moderation. Device favorites stay in your browser. Sheet music scanning works differently. It uploads the PDF or image to a separate recognition service. Do not scan material you do not want to transmit.
Continuing practice on this device
The Studio keeps your most recently opened score, playback position and practice settings in this browser so you can return to the same song. Settings drafts, tool choices, library browsing filters, favorites and email/name form drafts are also kept locally. Practice results waiting to upload stay on this device until you save or discard them. These local copies are not shared between devices. Clearing this site's browser data removes it; saving a score to your library is a separate action.
Your account
Signing in can use Google, GitHub, Facebook or Instagram. We receive your basic profile information and, when the provider supplies it, your email address. If Meta does not supply an email, you enter one and we use Resend to send a one-time verification link. We do not receive your social account password. For email accounts, we store a salted one-way password hash. We also store your instrument, tuning reference, and fingering preferences.
Payments
Payments are processed by Stripe. Card details go to Stripe and are never seen or stored by us. We keep the identifiers Stripe gives us so we know which plan you are on.
Measuring whether the tools get used
The app reports aggregate usage events such as tuner detection, score opening, playback and guided practice. Each event type is sent at most once per browser tab. The event payload contains only the event name and a normalized page path, not uploaded titles, score IDs, or microphone audio.
The event handler does not store account identifiers or cookies with these counts. Normal same-site HTTP requests can still carry browser cookies and network metadata. The record that an event was already sent lives in your tab and is discarded when you close it.
Our host, Cloudflare, also counts page views for this site. It sets no cookie and does not follow you to other sites.
What we do not do
We do not sell your data. We do not share it with advertisers. There is no advertising in this application, and nothing here profiles you or follows you across other websites.
Getting your data out, or deleted
You can export every session and scored note as CSV or JSON on any plan. To delete your account and its data, write to [email protected] and we will do it.
Contact
For questions about this policy or your data, email [email protected].