Help Center

Simply tap the camera button, take a photo of your food, and Calvin's AI will automatically identify the items and estimate calories and macros. You can also add text notes for quick logging.

Calvin uses advanced vision AI to analyze your food photos. While AI estimates are generally reliable, they may vary based on photo quality and portion visibility. You can always adjust the values manually.

Yes! Tap on any entry in your daily journal to view details, then you can adjust portion sizes, calories, or macros as needed.

Swipe left on any entry in your journal to reveal the delete option. You'll have a brief moment to undo if you delete by mistake.

Use the History tab to see a calendar view of your logged days. Tap any day to see the full journal for that date.

Yes! When viewing a past day in History, you can use the 'Copy to Today' action to quickly log similar meals.

Days are color-coded based on how close you were to your calorie goal. Green means you hit your target, yellow means close, and red indicates you were significantly over or under.

Calvin uses the Mifflin-St Jeor equation, which considers your age, height, weight, gender, and activity level to estimate your daily calorie needs. Your goal (lose, maintain, or gain weight) then adjusts this target accordingly.

Yes, go to Profile > Goals to update your weight goal, activity level, or target calories at any time.

You can log weight entries in the Profile section. Calvin will track your progress over time and show trends in the Insights tab.

The Insights tab shows your calorie and macro trends over time, weight progress, streak tracking, and personalized recommendations to help you reach your goals.

Your streak counts consecutive days where you've logged at least one entry. Missing a day will reset your streak.

Yes, you can request a full export of your data from Profile > Privacy > Export Data. We'll send you a download link via email.

Go to Profile > Account Settings to update your email address. You'll need to verify the new email before the change takes effect.

Yes! Sign in with the same account on any device and your data will sync automatically.

Go to Profile > Account Settings > Delete Account. This action is permanent and will remove all your data. We may retain some information as required by law.

Pro includes unlimited photo analysis, detailed macro tracking, advanced insights, weight predictions, AI-powered recommendations, and priority support.

Calvin Pro is $9.99/month or $79.99/year (save 33%). Both plans include a 7-day free trial.

Subscriptions are managed through the App Store. Go to Settings > Apple ID > Subscriptions on your iPhone to manage or cancel.

Refunds are handled by Apple. Contact Apple Support or request a refund through reportaproblem.apple.com.

Yes, we use industry-standard encryption for all data in transit and at rest. Your photos are processed securely and we never sell your personal information.

Photos are securely stored to display in your journal. You can delete any entry at any time, which also removes the associated photo.

We only share data with service providers necessary to operate Calvin (hosting, AI processing, payments). We never sell your data. See our Privacy Policy for details.

You can request a full export of your data from Profile > Privacy > Export Data, or contact privacy@calvin.vip for assistance.