In short
Tonagi is designed to work with as little data as possible. Your instrument's sound is analysed on the device itself, in real time. We use no third-party analytics, no advertising and no tracking, and we do not sell data. Everything the app keeps stays on your device and, if you choose, in your own iCloud account. The only case where you create an account and send us anything is if you choose to publish material to, or like material in, the community library on this website (optional — section 11).
1. Who we are
Tonagi is an iOS app for tuning practice, made for musicians. The data controller is Bernardo Barreira. For any privacy question, contact us at [email protected].
2. The principle: almost no data collection
The tuner, generator, metronome, sequences, routines and progress work without any account and without collecting name, email, location, advertising identifiers or other personal data. Sound is processed on your device and your study material stays under your exclusive control.
The only exception is the community library (optional — section 11): to publish material, or to like material, you need a basic account on this website. Browsing and importing from the library require no account. If you never publish or like, no personal data of yours is collected.
3. Microphone
The app requests microphone access for two purposes: to analyse, in real time, the pitch of the notes you play and, when you choose to record, to record your practice (see section 4).
- Processing happens entirely on your device.
- During normal tuning, the sound is analysed and immediately discarded — it is not stored.
- From tuning alone, the app keeps only analysis data (detected notes, deviations in cents, scores), not the audio. Audio is kept only from the recordings you make.
- You can revoke microphone access at any time in iOS Settings ▸ Privacy & Security ▸ Microphone. Without the microphone, the tuner and recording stop working, but the rest of the app remains usable.
4. Audio of your recordings
When you make a recording in the Progress tab, its audio is saved together with the recording's analysis — stopping a recording always keeps its audio (if the device runs out of space, the recording is kept without its audio). There is no separate "cancel": to remove a recording you move it to the Trash, where it stays for 30 days before it is deleted, or you delete it permanently from there. About these recordings:
- They stay on your device. If you have iOS backup enabled, they are also kept in your personal iCloud account, managed and encrypted by Apple.
- They are never transmitted to us or to any server. We have no way to access them.
- You can delete a recording's audio, or the whole recording, at any time within the app.
- If you import an audio file for analysis (.m4a, .mp3, .wav, .aiff), that analysis happens entirely on your device.
5. Study material the app stores
Your recordings, sequences, routines, projects, custom temperaments, presets and preferences are stored on your device. They are yours and remain under your control: you can view, export and delete them inside the app.
Photos and Siri. When you choose to share a recording or project as an image and save it, the app only adds that one image to Photos — it never reads your photo library. The app's Siri shortcuts only open a screen of the app; nothing is sent to us.
6. iCloud sync and backup (optional)
If you enable the app's iCloud sync, or iOS backup, your study material — and, in the case of backup, the audio recordings — is copied to your personal iCloud account so it is available across your devices.
- The data leaves your device only to your own iCloud account — never to our servers.
- We have no access to your iCloud account or to the data stored there.
- Apple's processing is governed by Apple's privacy policy.
- You can turn off the app's sync at any time in Settings.
7. Purchases
Subscriptions, the lifetime purchase and donations are processed by Apple, through the App Store (StoreKit). We never see or store your payment data. Billing, refunds and subscription management are handled by Apple. The app only checks, on your device, whether your purchase is active.
8. What we do NOT collect
Apart from the optional community-library account (section 11):
- We do not ask for or create user accounts to use the app.
- We do not collect name, email, location, advertising identifiers or any other personal data.
- We do not use third-party analytics, advertising or tracking — in the app or on this website.
- We do not use cookies. When you sign in on this website, your session is kept in your browser's local storage, only so you stay signed in.
- We do not sell data or share it, except the material you yourself choose to publish to the library.
9. Third parties
The app integrates no third-party data services. It relies only on Apple infrastructure (App Store for purchases; iCloud for syncing/backing up to your personal account), whose processing is governed by Apple's policy. The app includes open-source software libraries (AudioKit) that run on your device and collect and transmit nothing.
When you tap Open in Tonagi on an item of the community library, the app downloads that one file from this website. The request passes through Cloudflare like any visit to the site and carries no data about you.
This website is served by Cloudflare and the community library runs on Supabase — both acting as processors for the account data described in section 11. Sign-in codes and moderation notices are sent by Resend, which only handles the email address the message goes to. Where these providers are based outside the European Union, transfers rely on the EU–US Data Privacy Framework or the European Commission's standard contractual clauses.
10. Children
The core of Tonagi (tuner, metronome, sequences, routines, progress) collects no personal data from anyone, including children, and has no chat or messaging between users. It is not directed at children under 13 without adult supervision.
Publishing and liking in the community library (section 11) require an account and are intended for users aged 16 or over; below that age, the verifiable consent of a holder of parental responsibility is required, in line with the GDPR.
11. Community library account (optional)
The community library lets you share and discover study material — sequences, routines and temperaments created by musicians. Browsing and downloading require no account. To publish or to like, you create a basic account on this website. What it involves:
- How you sign in — either with Sign in with Apple or with a 6-digit code sent to your email (no passwords). With Apple we receive only an identifier and an email address — and if you choose “Hide My Email”, that address is a private relay from Apple, so your real email never reaches us. We don't ask Apple for your name. Either way, the email is stored securely by our authentication provider (Supabase) and is never shown publicly.
- Bot check — the sign-in form may run Cloudflare Turnstile to confirm you're a person. It sets no tracking or advertising cookies.
- Display name — the name shown next to what you publish. It is the only public information about you.
- Your submissions — material you upload is reviewed before it appears, and once approved becomes publicly available, attributed to your display name. It never includes audio recordings. You must only publish material you hold the necessary rights to.
- Your likes — which items you liked (a preference, stored so the button knows its state and so the library can order by most liked). Only aggregate counts are public; nobody sees your individual likes.
You can delete what you published at any time, and you can close your account: closing it deletes your profile, your submissions (including published material) and your likes. Account data is kept only for as long as the account exists.
12. Ambassadors, collaborators and institutions
This website may present profiles of ambassador artists and collaborators — name, profession, photograph, biography. That information is published on the basis of each person's own consent (GDPR art. 6(1)(a)), documented separately — never through these pages or any blanket clause. Anyone whose data appears here can withdraw that consent and ask for removal at any time: write to [email protected] and the profile comes down.
The site may also mention institutions — conservatoires, orchestras, schools — where Tonagi is used. Such references are made with the relevant permission where required and do not imply endorsement unless expressly stated.
13. Future feature — teacher–student mode (not yet available)
A teacher–student mode is planned for a future version and does not exist today, so it processes no data. It will share, between chosen people, material only — there will be no messaging, chat or conversations. When (and if) launched, it will have its own consent flow, will process only necessary data, and this policy will be updated and communicated inside the app before it goes live.
14. Security
Because your data lives on your device (and, if you choose, in your iCloud account), it benefits from iOS protections: device encryption and the security safeguards of your Apple account. Community-library data is protected by row-level security rules enforced by the database itself.
15. Your rights
Under the GDPR and equivalent laws, you have rights of access, rectification, erasure, portability, restriction and objection regarding your personal data. With the app, exercising them is direct: everything that exists is on your device and in your iCloud account, under your exclusive control. With a community-library account, you can see and manage your data in your account and delete everything via account deletion. For any question, write to [email protected]. You also have the right to lodge a complaint with your competent supervisory authority.
16. Changes to this policy
If this policy changes, we will publish the updated version on this page, with a new date, and communicate relevant changes inside the app.
17. Contact
Questions or requests about privacy: [email protected]
Postal address of the controller: Bernardo Barreira, Apartado 001025, EC Rotunda - Braga, 4710-998 Braga, Portugal.