Privacy

Last updated 12 November 2026

Fretwise is a guitar practice app at playfretwise.com: a tuner, exercises scored as you play, games, and songs to learn. It’s an independent app made in Australia. This page says what Fretwise keeps, where it goes, how long it stays, and how to take it with you or delete it.

On your device

Fretwise saves your practice in your browser’s own storage (local storage and IndexedDB), on your device. We can’t see it. It holds:

• your progress: XP, sessions, best scores, which days you practised, and the history of your runs;
• your settings: volumes, scoring, which input device and channel you use, and your timing calibration;
• exercises you made yourself;
• the song you last opened: the audio file and what Fretwise worked out from it (notes, chords and tempo), so it’s still there next time;
• a copy of your data from the start of each day, for the last 7 days, so you can go back if something goes wrong.

It stays until you clear this site’s data in your browser or remove the app. Fretwise asks your browser to keep it even when your device is short of space. Fretwise doesn’t set cookies.

Microphone

The tuner, the exercises and the games listen to your guitar through your microphone or audio interface, once you allow it. The sound is analysed in your browser as you play, to find the pitch and timing. It isn’t recorded, saved or sent anywhere. You can turn microphone access off at any time in your browser’s settings.

Songs

When you open a song, the file is read in your browser, and the notes are worked out there by a model that comes with the app. The file isn’t uploaded.

Splitting a song into parts (guitar, bass, backing) needs the Fretwise helper, a program you run on your own computer. The song then goes from your browser to that helper on the same computer, and nowhere else. If StemKit is installed on that computer, the helper can also open songs from your StemKit library there. The playfretwise.com website doesn’t contact the helper.

Your account

An account is optional. It keeps your progress safe and lets you pick up on any device. You can sign in with Google, with Apple, or with a link and 6-digit code sent to your email. Accounts and their data are handled by Supabase, our account and database service, in Sydney, Australia.

With an account, these are kept:

• your email address;
• with Google: your name, a link to your profile picture, and Google’s ID for your account. Fretwise asks Google only for these (the openid, email and profile scopes). It can’t see anything else in your Google account and never posts anything;
• with Apple: your name if you choose to share it, and your email address or the private relay address Apple gives you;
• your progress, and four settings: click volume, guide volume, octave-free scoring and how lenient scoring is. Your input device, channel and timing calibration stay on each device, because they belong to its hardware. Exercises you made stay on the device too;
• sign-in records: when you signed in, and the IP address and browser that made each sign-in request. Supabase keeps these to run the service and keep accounts secure.

Only you can read or change your data: the database refuses any request that isn’t signed in as you. Sign-in emails are sent by Supabase. Your browser keeps a sign-in token so you stay signed in. Signing out removes it from that browser, and your progress stays on the device.

Your account and its data are kept until you delete the account.

Hosting

• The site is hosted by Vercel. Like any web server, Vercel sees the IP address and browser of each visit and the page asked for, and keeps short-lived logs to run the service.
• There’s no analytics, advertising or tracking code in Fretwise.

Who else sees your data

Only the services that run Fretwise: Supabase (accounts, synced progress and sign-in emails), Vercel (hosting), and Google or Apple if you choose to sign in with them. Nothing is sold or shared for advertising.

Take your data with you

In Fretwise, go to Settings › Your data and choose Export backup. You get a file with your progress, settings and your own exercises. Import backup puts it back, on this device or another one.

Delete your data

• On a device: clear the site data for playfretwise.com in your browser’s settings, or remove the installed app. Export a backup first if you want to keep anything.
• Your account: email playfretwise@gmail.com from the address you sign in with, and we’ll delete your account within 30 days. That removes your sign-in details and synced progress from Supabase. Progress saved on your devices stays there until you clear it.
• You can also stop Fretwise using your Google sign-in at myaccount.google.com/permissions, or your Apple sign-in in your Apple Account settings under Sign in with Apple.

Changes

If this page changes, the date at the top changes with it.

Contact

Questions about your data: playfretwise@gmail.com. Fretwise is an independent app made in Australia.