Simple Calorie Tracker: Calvin

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