Privacy Policy
Last updated: September 24, 2026
This policy explains what DietCoach collects, why, and what you can do about it. DietCoach ("the app") is published by CloudArbitration LTDA ("we", "us"), the same company behind Kaha Trainer. You can reach us at info@kahatrainer.com.
1. The short version
We store the nutrition data you create — your food log, foods, recipes, goals, programs, check-ins and weigh-ins — so it follows you to a new phone. Photos and text you send to the AI features go to Anthropic (Claude) for analysis and are not stored by us. Usage statistics sit under a random identifier that is not connected to your account. The free version shows ads, which may use an advertising identifier only if you allow it. Data read from Apple Health stays on your device and is never used for advertising. We do not sell your personal data.
2. Data we collect
2.1 Account information — shared with Kaha Trainer
To create an account we collect your email address and a display name. If you use Sign in with Apple, we receive whatever Apple sends us — which may be a private relay address instead of your real email. Passwords are handled by our authentication provider and are never visible to us.
DietCoach and Kaha Trainer use the same account. Signing in to either app gives access to the same profile, body weight and body measurements, and deleting the account in either app deletes it in both.
2.2 Body and nutrition data
Everything you create in the app, which is the reason it exists:
- Body data you enter: sex, date of birth, height, activity level, weight, body-fat percentage
- Your food log: what you ate, how much and when, fasting and incomplete days, manual daily totals
- Custom foods, recipes (ingredients, steps, source links) and favorites
- Goals, nutrition programs, weekly check-ins and the energy expenditure calculated from them
- Your preferences: units, language, check-in day
2.3 Apple Health data
The Apple Health integration is optional and off until you authorize it. If you do, DietCoach reads your step count to show it in Progress. Steps are used on your device only: they are not sent to our servers. DietCoach does not write anything to Apple Health.
Data obtained from Apple Health is never used for advertising or marketing, never sold, and never shared with third parties.
2.4 AI features
Some features use artificial intelligence: analyzing a meal from photos or a description, reading a nutrition label, and importing a recipe from photos, text or a link. When you use one of them:
- The photos (up to three, resized), the text and the link you chose to send go through our server to Anthropic, the company that makes the Claude AI, which returns the analysis. For a link, our server downloads the page and sends its text.
- The app asks for your permission before the first use. You can withdraw it at any time under Profile → AI; the AI features then stop working until you allow them again.
- Your name, email, account identifier and health data are not sent to Anthropic.
- We do not store the photos or the text. We record only that an analysis happened — date, type and cost — to apply your plan's limits.
- Under Anthropic's commercial terms, data sent through its API is not used to train its models. Anthropic may retain it for a limited period for safety and abuse monitoring.
The AI suggests ingredients and amounts; nutrition values always come from the food database, and you review everything before it is logged.
2.5 Barcode lookups
When you scan a barcode that is not already in our database, the app looks the number up in Open Food Facts, a public food database. Only the barcode number is sent — along with the technical data any internet request carries, such as your IP address.
2.6 Subscriptions
Purchases are processed by Apple; we never see your payment details. To unlock the plan you paid for, we store the subscription's product, status, renewal and expiry dates and Apple's transaction identifiers, linked to your account.
2.7 Usage analytics
To understand which screens deserve to exist, the app records product events: which screen was opened, whether a meal was logged, whether an ad was shown or skipped and why. Each event carries a random identifier generated on your device at install, a session number, the event name, the app version, the platform and the time.
That identifier is not linked to your account, your email or any measurement you recorded. It is recreated if you delete and reinstall the app.
2.8 Advertising
The free version of DietCoach is supported by ads served by Google AdMob. Depending on your choices and region, AdMob may process your device's advertising identifier (IDFA), general device and network information, and ad interaction data.
On iOS, the advertising identifier is only available if you allow tracking when the system asks. If you decline, the app works exactly the same and you still see ads — just less relevant ones. Subscribers to any plan see no ads. Google's handling of this data follows its own policies; see How Google uses information from sites or apps that use our services.
2.9 Notifications
Meal and weigh-in reminders are scheduled locally on your device. Their times stay on the device, and no notification content passes through us.
2.10 What we do not collect
- We do not collect your location.
- We do not access your contacts or microphone.
- The camera is used only when you choose to scan a barcode or photograph a meal, label or recipe. Photos are not stored by us.
- We do not collect payment card details.
3. Why we process it
| Purpose | Data | Legal basis (LGPD / GDPR) |
|---|---|---|
| Provide the service: log food, calculate targets and expenditure, sync across devices | Account, body and nutrition data | Performance of a contract |
| Analyze meals, labels and recipes with AI | Photos, text and links you choose to send | Consent (asked before first use) |
| Show your steps | Apple Health step count | Consent (you authorize Health) |
| Unlock paid plans | Subscription status | Performance of a contract |
| Understand product usage and fix what is broken | Anonymous usage events | Legitimate interest |
| Support the free version with advertising | Advertising identifier, ad interactions | Consent, where required |
Nutrition and body data can be sensitive. We use them only to provide the app's features to you, never for advertising.
4. Who we share it with
We do not sell personal data. We share it only with the providers that make the app work:
- Supabase — hosts our database, authentication and server functions. Processes your data on our instructions.
- Anthropic — analyzes the photos, text and links you send to the AI features, as described above.
- Google AdMob — serves ads in the free version, as described above.
- Open Food Facts — receives the barcode numbers you look up.
- Apple — provides Sign in with Apple, in-app purchases and, if you enable it, HealthKit.
5. International transfers
Our providers operate infrastructure that may be located outside your country, including in the United States. Where required, transfers rely on the European Commission's standard contractual clauses or an equivalent mechanism offered by the provider.
6. How long we keep it
Account, body and nutrition data are kept while your account exists. AI photos and text are not stored after the analysis. Anonymous usage events are retained in aggregate; because they are not linked to your identity, they cannot be isolated and removed per person.
7. Your rights
Depending on where you live, you may have the right to access, correct, export, restrict or delete your personal data, to object to processing, and to withdraw consent at any time. To exercise any of these, write to info@kahatrainer.com from the address associated with your account. We answer within 30 days.
Deleting your account. In the app, go to Profile → Delete Account. The account and all its data are erased immediately and permanently — in DietCoach and in Kaha Trainer, since they share the account.
If you are in the European Economic Area or the United Kingdom, you also have the right to lodge a complaint with your local data protection authority.
Practical controls — AI permission, tracking, Health access, notifications — are listed on Your Privacy Choices.
8. Security
Data in transit is encrypted with TLS. Access to the database is restricted by row-level security rules so that an account can only read its own records, and the AI provider's key lives only on our server, never in the app.
9. Children
DietCoach is not directed at children under 13 (or under the minimum age set by your country's law, where it is higher). We do not knowingly collect data from them. If you believe a child has given us data, write to us and we will delete it.
10. Health disclaimer
DietCoach provides educational information based on what you enter. It is not medical advice. Talk to a health professional before big changes to your diet, especially if you are pregnant, have a medical condition or a history of eating disorders.
11. Changes to this policy
If we change this policy, we will update the date at the top and, for changes that matter, tell you in the app before they take effect.
12. Contact
CloudArbitration LTDA
info@kahatrainer.com
kahatrainer.com/dietcoach