Simple Calorie Tracker: Calvin
Macros, Fitness & Health
Free · In‑App Purchases
Calvin is a simple calorie, macro, fitness, and health tracker that keeps the basics free.
Track food, calories, macros, weight, workouts, steps, sleep, recovery, and health trends in one place — without ads or requiring an account.
Barcode scanning and food search are free. Most calorie trackers moved them behind a subscription. Calvin does not.
FREE, AND STAYING FREE
• Barcode scanning for packaged foods
• Food search with USDA Branded and Open Food Facts
• Calorie, macro, protein, carb, fat, fiber, sugar, and sodium tracking
• Fast manual logging, common foods, recents, usuals, one-tap repeat logging, and copy yesterday's log
• Custom recipes
• Weight tracking with a smoothed trend line and adaptive maintenance calories based on your real weight trend
• Fitness tracking for workouts, steps, distance, and active time
• Apple Health integration and automatic compatible smart-scale weigh-ins
• Body fat and lean mass trends when available
• Google Health connection
• Sleep, HRV, resting heart rate, personal baselines, and a daily recovery score
• Weekly and monthly recaps, plus year in review
• Home Screen and Lock Screen widgets
• Apple Watch app and complication
• Siri, Shortcuts, and CSV export
FAST FOOD LOGGING
Start typing a food and Calvin surfaces foods you've logged before. One tap logs it again. The built-in pantry makes everyday staples like eggs, apples, rice, and chicken quick to add.
CALORIES & MACROS, YOUR WAY
Calories stay front and center while macros and nutrients are there when you want them. Choose which metrics appear throughout the app. Turn calorie numbers off for a simpler on-track-or-over view.
FITNESS, WEIGHT & MAINTENANCE CALORIES
Keep workouts and daily activity alongside nutrition. Track weight with a smoothed trend line, and let Calvin adapt your maintenance-calorie estimate over time based on your real weight trend.
HEALTH & RECOVERY
Bring together sleep, HRV, resting heart rate, breathing rate, activity, and other available health signals. Calvin compares supported metrics with your recent baseline. Your daily recovery score summarizes how you're doing and highlights the signals that changed.
APPLE HEALTH & SMART SCALES
Connect Apple Health to bring supported fitness and health data into Calvin. Compatible smart-scale weigh-ins can appear automatically, including body fat and lean mass when your scale provides them. Connections are optional.
APPLE WATCH
Check calories remaining, your chosen macros, and recovery from the Calvin Apple Watch app and complication.
NO ACCOUNT NEEDED. NO ADS.
Use Calvin without creating an account. Your food log lives on your device, not on a Calvin server. Connecting Apple or Google is optional and does not upload or restore your food log.
WEEKLY, MONTHLY & YEARLY TRENDS
See patterns across nutrition and health data with weekly and monthly recaps and a year in review.
CALVIN PLUS — AI MEAL SCANNER
Calvin Plus adds AI-powered meal photo scanning and deeper insights. Take a photo and Calvin identifies foods on your plate and estimates their nutrition. It can account for things a photo may miss, like cooking oil, and asks before keeping uncertain additions. Adjust portions, add a missing item, or make a correction without starting over. Monthly and annual plans are available in your local App Store currency with a 3-day free trial.
Barcode scanning, food search, calorie and macro tracking, fitness, weight, health features, and the other core features above remain free.
SIMPLE BY DESIGN
Calvin helps you understand nutrition, fitness, weight, and health without turning every meal into homework. Track what matters. Ignore what doesn't.
Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy:
https://calvinhealth.com/privacy
Ratings & Reviews
Fixed an issue where System appearance could keep the previous Light or Dark setting instead of following your device.
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
- 18.5 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 7 more
- English, French, German, Italian, Portuguese, Slovak, Slovenian, 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