Privacy Policy

Last updated: September 11, 2026

CalHow is operated by myzoapp ("we", "our", "the app"), a mobile app that helps you understand calories and nutrition by analyzing photos of your meals. This policy explains what information CalHow collects, how it's used, and who it's shared with.

1. Information we collect

Account information

When you create an account, we collect your email address and display name, via one of: email/password, Sign in with Google, or Sign in with Apple. Authentication is handled by Firebase Authentication (Google).

Profile and health-adjacent information

To calculate personalized calorie and macro targets, we collect information you choose to provide, which may include: gender, date of birth, height, weight, body fat percentage, activity level, dietary preferences, and your nutrition goals. You control what you enter and can update it at any time.

Meal photos and nutrition data

When you scan a meal, the photo you take or select is uploaded and analyzed to identify foods and estimate nutrition. We store the resulting meal entries (foods, calories, macros, and the photo) in your account so you can track your history.

Weight logs

If you log your weight over time, those entries are stored under your account to show progress trends.

Purchase information

If you subscribe to CalHow Pro, your purchase is processed by the Apple App Store or Google Play, and subscription status is verified through RevenueCat. We do not receive or store your payment card details.

Usage information

We keep a server-side daily count of AI meal scans per account to enforce free-tier limits. This is not visible or editable by the app itself.

2. How we use your information

• To identify the foods in a meal photo and estimate its nutrition
• For CalHow Pro features you use: to read restaurant menu photos, to generate personalized insights about your meals, to suggest meal ideas that fit your remaining calories, and to adjust future scans based on how you've edited portion sizes before
• To calculate and track your calorie and macro goals and progress
• To maintain your account and sync your data across sessions
• To verify and manage subscription entitlements
• To enforce free-tier usage limits
• To provide customer support when you contact us

We do not use your data for advertising, and we do not sell your personal information to third parties.

3. Who we share information with

CalHow relies on the following service providers to operate. Each processes only the data needed to perform its function:

• Firebase (Google) — authentication, database storage for your account, meals, and weight logs, and storage for the meal photos you upload.
• Anthropic — meal photos are sent to Anthropic's AI vision model to identify foods for nutrition analysis. If you use CalHow Pro's Menu Scanner, the menu photo is sent to read its dishes. If you use AI Meal Insights, that meal's foods and nutrition, the day's nutrition totals, your goal and targets, and your diet type, allergies and disliked ingredients are sent to generate the insights. If you ask for new meal ideas, your remaining calories and protein for the day, the meal type, and your diet type, allergies and disliked ingredients are sent. Your name and email are not sent.
• USDA FoodData Central — a public U.S. government food database used to look up nutrition values for identified foods (only food names are sent, not personal data).
• RevenueCat — manages and verifies in-app subscription purchases.
• Apple / Google — processes in-app purchases and, if used, Sign in with Apple / Google authentication.

We do not share your information with third parties for their own marketing purposes.

4. Data retention and deletion

Your account data is retained for as long as your account is active. You can permanently delete your account, including your profile, meals, and weight logs, at any time from Settings → Account & Data → Delete Account in the app. Some records — such as backend logs, uploaded photos on our storage provider, or billing records required for tax/legal purposes — may be retained separately for a limited period as required by law or our service providers' own retention policies.

5. Security

Data is transmitted over encrypted (HTTPS) connections. Your account data in our database is protected by access rules that restrict it to your own signed-in account; our backend service that performs AI analysis uses privileged server-side credentials that are never exposed to the app or other users.

6. Children's privacy

CalHow is not directed at, and may not be used by, anyone under 18 years old. If we learn that someone under 18 has created an account or provided personal information, we will delete that account and its associated data as soon as reasonably possible. If you believe a user under 18 has signed up, contact us at md.sabeel10@gmail.com so we can investigate and remove it.

7. Your choices

• You can edit or remove profile information at any time in the app.
• You can delete individual meals or weight entries from your history.
• You can delete your entire account and associated data from Settings.
• You can revoke camera or photo library access at any time from your device's system settings (this will limit meal-scanning features).

8. Governing law

This Policy is governed by the laws of India, and any dispute over it is subject to the exclusive jurisdiction of the courts of New Delhi, India.

9. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be reflected by updating the "Last updated" date above.

10. Contact us

Questions about this policy or your data can be sent to md.sabeel10@gmail.com.