NEWTZ
Français
Privacy Policy
Last updated: October 16, 2026
In short: NEWTZ only collects what it needs to run your gym logbook. Your data is hosted in Europe, is never sold and is never used for advertising. You can export it or delete your account at any time in the app (Profile > My data).
1. Who is responsible for your data?
The NEWTZ app is published by Kévin Beltran, an independent developer (see the legal notice). For any question about your data: [email protected].
2. The data we collect
Your account
- Your email address, so you can sign in with a one-time code (there is no password).
Your profile
- First name, sex, age, height, weight, goal (bulk, cut, recomp), number of workouts per week, and calorie and macro targets.
Your activity in the app
- Workouts: exercises, sets, weights, reps, dates and durations.
- Nutrition: foods added to your log, amounts and meals.
- Supplements: your supplement list and the doses you check off.
Coach space
- If you join a coach: the link with your coach, your sharing choices (weight, nutrition) and the date you agreed, the workouts they send you, their comments and the feedback you write to them.
- If you are a coach: your coach name, your invitation code, your list of clients and what you send them.
Community features
- Buddies: your friend code, friend requests and connections, your duels, and the volume you lifted, which your buddies see in the ranking.
- Social network, only if you turn it on: your username, your bio, what you choose to show, who you follow and who follows you, your posts and reactions, the members you block and the reports you send.
- If you choose to share your weight, measurements or meals on your profile: these choices and the date you agreed.
What stays on your phone
- Your preferences (language, rest time) and a local copy of your data so the app works offline.
- The camera is only used to read barcodes: no photo is stored or sent.
- Story cards are created on your phone and are not sent anywhere unless you choose to share them.
- Rest-timer notifications are scheduled on your phone.
What we don't collect
- No location, no contacts, no advertising trackers, no selling of data.
3. Why, and on what legal basis
| Purpose | Data | Legal basis |
|---|---|---|
| Create your account and sign you in | Performance of the contract (the terms of use) | |
| Calculate your targets and track your progress | Profile, workouts, nutrition, supplements | Your explicit consent, asked at sign-up, because weight and diet can reveal information about your health |
| Sync your data across your devices | All your account data | Performance of the contract |
| Buddy features (ranking, duels) | First name, friend code, volume, duels | Performance of the contract, only if you add buddies |
| Social network (profile, follows, feed) | Username, bio, stats you choose to show, posts, reactions | Performance of the contract, only if you turn on the social network |
| Showing your weight, measurements or meals on your profile | The health data you choose to share | Your explicit consent, asked before the first share. You can make everything private at any time |
| Protecting the community (reports, blocks, moderation) | Reports, blocks, reported content | Legitimate interest |
| Letting your coach follow you | Workouts and feedback; weight and nutrition only if you share them | Your consent, given when you join your coach. You can withdraw it at any time, share by share or by leaving your coach |
| Managing Premium and Coach subscriptions | Account ID, subscription status | Performance of the contract |
| Keep the service secure and working | Technical connection data | Legitimate interest |
You can withdraw your consent at any time by deleting your account.
4. What others see
Your buddies only see your first name, your friend code, the volume you lifted this month and your duel scores.
Social network members, if you turn it on, see your username, your bio, your followers and who you follow, your posts and what you choose to show: workouts this month, training mix, best records. Your weight, measurements and meals stay private by default. You can choose to show part of them (for example only your weight trend, or only your calories and macros), after confirming that you agree to share health data. Your email is never visible. Turning off the social network makes your profile invisible and unsearchable.
If you join a coach, they see the details of your workouts and the feedback you write to them. They see your weight and nutrition only if you agree to share them. You can change these choices or leave your coach at any time (Profile > My coach): their access ends immediately. Your coach commits to using your data only to support you.
5. Who processes your data for us
| Provider | Role | Location |
|---|---|---|
| Supabase | Database and sign-in | European Union (Amazon Web Services infrastructure, Paris region) |
| Resend | Sending the emails with your sign-in code | United States, covered by the European Commission's Standard Contractual Clauses and the EU–US Data Privacy Framework |
| RevenueCat | Management of Premium and Coach subscriptions bought on the App Store or Google Play | United States, covered by the European Commission's Standard Contractual Clauses |
| Cloudflare | Hosting of the newtz.app website | Global network |
| Open Food Facts | Food database | France. The app only sends the text you search for or the barcode you scan, never your identity. |
| Apple and Google | App distribution and notifications | Under their own privacy policies |
If we add other services, for example for crash reporting, this page will be updated before they go live.
6. How long we keep your data
- As long as your account exists.
- When you delete your account, all your data is immediately erased from our database. It may remain for a few days in our host's technical backups before being removed automatically.
- An account that has been inactive for 3 years is deleted, after a warning email.
7. Your rights
Under the GDPR, you have the right to access, correct, delete and retrieve your data (portability), to object to or restrict its processing, and to withdraw your consent.
- Export your data: Profile > My data > Export my data.
- Delete your account: Profile > My data > Delete my account.
- Correct your profile: directly in the Profile screen.
- For anything else: [email protected]. We reply within one month.
If you believe your rights are not respected, you can lodge a complaint with the French data protection authority, the CNIL (cnil.fr), or with the authority in your country.
8. Security
Traffic between the app and our servers is encrypted (HTTPS). Each user can only access their own data, thanks to security rules enforced directly in the database. You sign in with a code sent by email, so there is no password to steal.
9. Minimum age
NEWTZ is for people aged 16 and over. If you are under 16, please don't use the app.
10. Changes
We may update this policy, for example when a new feature arrives. The date at the top of the page shows the latest version. If something important changes, we'll let you know in the app.