Calvin: Simple Calorie Tracker
AI Meal Scan & Macro Log
Free · In‑App Purchases
Calvin is an AI-powered calorie tracker that keeps the basics free.
Barcode scanning and food search are free here. Most trackers moved them behind a subscription. Calvin does not.
FREE, AND STAYING FREE
- Barcode scanning for packaged food
- Food database search, USDA Branded with Open Food Facts as a fallback
- Manual logging with full macros: protein, carbs, fat, fiber, sugar, sodium
- Common foods, recents and usuals, one tap to log again
- Copy yesterday's whole log when today is empty
- Recipes
- Weight tracking with a smoothed trend line
- Adaptive maintenance calories, back-calculated from your real weight trend so imperfect logging self-corrects against the scale
- Apple Health sync: weigh-ins from a smart scale arrive on their own, with body-fat and lean-mass trends when your scale reports them
- A direct Google Health connection
- Sleep, HRV, resting heart rate and a daily recovery score
- Weekly and monthly recaps, and your year in review
- Home and Lock Screen widgets
- An Apple Watch app and complication: calories left, every macro you track, and recovery at a glance
- Siri and Shortcuts
- CSV export
NO ACCOUNT NEEDED, NO ADS
Sign-in is optional and can be skipped. Everything above works without one, and your food log lives on your phone, not on a server. Linking Apple or Google is optional and does not upload or restore your food log; your log stays on your phone.
LOGGING IN UNDER FIVE SECONDS
Type a food name and everything you have logged before appears as you type. One tap logs it again. A built-in pantry handles staples like egg or apple with no keypad at all.
READ AGAINST YOUR OWN USUAL, NOT A TEXTBOOK
Sleep, HRV, resting heart rate and the rest are judged against your own recent range, so a number that is normal for you stays quiet. A recovery score sits at the top of the Health tab, blended from HRV, resting heart rate, sleep and breathing rate, with one sentence naming whichever of them actually moved it.
HONEST NUMBERS
Calories lead, macros sit behind them, and you choose which ones appear anywhere in the app. Turn calorie numbers off entirely for a gentler on-track-or-over view.
CALVIN PLUS
An AI meal photo scan that reads a whole plate into separate foods, counts the cooking oil a camera cannot see and asks before it stays, and takes a one-tap fix or a missing item without starting over, plus deeper insights. Monthly and annual plans are shown in your local App Store currency, with a 3-day free trial.
Everything listed above stays free.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://calvinhealth.com/privacy
Ratings & Reviews
A small layout polish on the Apple Watch app: the macro progress bars now line up evenly with the calorie ring.
The developer, Kevin Miguel Estrada Garcia, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kevin Miguel Estrada Garcia
- Size
- 16 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
13+
- 13+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Calvin Plus Annual $49.99
- Calvin Plus $9.99
- Copyright
- © 2026 Kevin Miguel Estrada Garcia