Privacy Policy

Sustane is a nutrition and health app made by Quantifit Health & Wellness Technologies Pvt. Ltd. ("Sustane", "we", "us"). This policy explains what we collect when you use the Sustane app and this website, why we collect it, who helps us process it, and the choices you have. We wrote it to match what the app actually does.

The short version: we collect what the app needs to set your targets, keep your diary and work out your health scores. We don't sell your data, we don't show ads, and you can delete your account and its data from inside the app at any time.

1. What we collect

Account details

When you sign in with Apple, Google or your phone number, we receive your name and email address (Apple and Google) or your phone number. If you use Sign in with Apple and choose to hide your email, we only receive Apple's relay address.

Your profile

To work out your calorie and macro targets we ask for your sex, date of birth, height, weight, activity level, diet type, goal, and your water and steps goals, plus your preferred units.

What you log

• Food diary entries, with the nutrition of each item at the time you logged it.
• Foods and recipes you create, and your favourites.
• Photos you add to foods you create. These are stored at a long, unguessable link: anyone who has the link can open the photo, but it isn't listed or searchable anywhere.
• Water, weight and other daily trackers.
• Health check-in answers you give to calculate your scores.
• The program you follow and its plan.
• Your reminder settings.

Apple Health

Only if you allow it, Sustane reads sleep, heart rate, heart rate variability, breathing rate, VO2 max, steps, exercise minutes and weight from Apple Health, and saves the water and weight you log back to Apple Health. We store daily summaries of these readings with your account so your recovery, cardio and metabolic scores, trends and history work across devices. You can choose which readings Sustane uses, or switch Apple Health off, in the app (Profile › Apple Health) or in the iPhone's Health settings.

Data from Apple Health is used only to provide Sustane's features to you. It is never used for advertising or marketing, never sold, and never shared with data brokers.

Camera and photos

If you use the camera or pick a photo to log a meal or scan a barcode, the image is used for that purpose only. Meal photos are sent to our AI provider (see below) to identify the food and estimate its nutrition; we don't keep the meal photo itself.

Usage and diagnostics

• A small set of usage events: a daily app open, when the Pro screen is viewed, and purchases. With them we record when you last used the app, its version and your App Store plan, if any.
• Crash and error reports (from Apple's MetricKit and the app itself), linked only to your user ID, so we can fix problems.
• For each AI request: the feature used, the model, how long it took and how many tokens it used, so we can keep a fair daily limit.

Nothing about your food or health is included in usage events. We don't use advertising identifiers or third-party ad trackers.

Purchases

Sustane Pro is sold through the Apple App Store. Apple handles payment; we never see your card details. We receive Apple's signed record of each transaction (product, dates, renewal and refund status) to unlock Pro and keep it in step with your subscription.

Messages you send us

If you email or message us on WhatsApp, we receive what you send and your contact details, and use them to reply.

2. How we use it

• To provide the app: your targets, diary, programs, recipes, scores, reminders and widgets.
• To provide AI features you ask for, such as meal photo recognition and the AI chef.
• To run your subscription and give access to Pro.
• To keep the service secure, prevent abuse and enforce daily AI limits.
• To find and fix bugs and to understand, in aggregate, how the app is used so we can improve it.
• To answer you when you contact us.

We process your data because you asked us to provide the service, with your consent (for example Apple Health, camera and notifications, which you can withdraw at any time), and where the law requires it.

3. Who processes it

We share data only with the providers that run parts of the service for us, and only what each needs:

• Supabase: our database, sign-in and file storage. Your data is stored in Supabase's Mumbai (ap-south-1) region.
• Google (Gemini API): processes meal photos and AI chef and recipe requests, together with the nutrition details needed for an answer (for example the calories and protein you have left today). We use the paid Gemini API, whose terms do not allow Google to use this content to train its models.
• Apple: Sign in with Apple, Apple Health (on your device), App Store payments and local notifications.
• Google Sign-In and an SMS provider for phone sign-in, to verify who you are.
• Open Food Facts: when you scan a barcode we don't have, we look up the barcode number (and nothing about you) in the Open Food Facts database.
• Vercel: hosts this website.

We don't sell or rent personal data and don't share it for advertising. We may disclose data if the law requires it, to protect people's safety, or as part of a merger or acquisition, in which case this policy would continue to apply.

4. How long we keep it

We keep your data for as long as you have an account. When you delete your account, your profile and everything linked to it (diary, foods you created, favourites, trackers, health data, check-ins, scores, programs and reminders) is deleted. Photos you added to foods you created are not yet removed automatically when you delete your account; email us and we'll delete them within 30 days. Crash reports, AI usage records and App Store transaction records are kept without your user ID, so they no longer identify you; transaction records are kept for as long as tax and accounting law requires.

5. Deleting your account

In the app, go to Profile › Delete account. This permanently deletes your account and its data straight away and can't be undone. If you added photos to foods you created, email hello@sustane.in and we'll delete those too. Deleting your account doesn't cancel an App Store subscription; cancel it in your iPhone's Settings › your name › Subscriptions. If you can't use the app, email hello@sustane.in from the address on your account and we'll delete it for you.

6. Your rights

You can see and correct your profile in the app at any time. You can also ask us for a copy of your data, to correct or erase it, or to withdraw a consent you gave, by writing to hello@sustane.in. Under India's Digital Personal Data Protection Act, 2023 and, where they apply to you, laws such as the GDPR, you may also have the right to nominate someone to act for you and to complain to the relevant data protection authority. We'll reply within 30 days.

7. Security

Data is encrypted in transit (HTTPS) and at rest. Row-level security in our database means each account can only read its own records, and only a small number of administrators can access the systems that hold it. No system is perfectly secure; if a breach affecting your data happens, we'll tell you and the authorities as the law requires.

8. Children

Sustane is not meant for children. You must be 18 or older to create an account. If you believe a child has given us personal data, contact us and we'll delete it.

9. Health information

Sustane's scores and suggestions are for general wellness and are not a medical diagnosis or treatment. See our Terms of Service.

10. This website

This website doesn't use cookies for tracking or advertising. Our hosting provider keeps standard server logs (such as IP address and pages requested) for security and reliability.

11. Changes

If we change this policy we'll update the date at the top, and for significant changes we'll tell you in the app before they take effect.

12. Contact and grievances

Quantifit Health & Wellness Technologies Pvt. Ltd.
Sector 2, HSR Layout, Bengaluru, Karnataka 560102, India
Email: hello@sustane.in
WhatsApp: +91 95082 95622

For complaints about how we handle your personal data, write to our Grievance Officer at hello@sustane.in with the subject "Grievance". We acknowledge grievances within 48 hours and resolve them within 30 days.