Your everyday nutrition companion
Track your food. Understand your progress. Get on with your day. Calvin brings it all together, with the essentials free and no account required.
Actual Calvin screens. Example data. Photo scanning requires Plus.
A little simpler. A lot more you.
From your first meal to your next milestone, make room for habits that fit your life.
Get to know Calvin
Take a look around. There’s a place for your food, your progress, and everything in between.
YOUR EVERYDAY LOG
Search a food, scan a barcode, or pick a usual. Review the serving, and Calvin brings your calories and macros together.
YOUR PROGRESS
Put your weigh-ins in perspective. Follow a smoothed trend over time, so a single day doesn’t have to tell the whole story.
CONNECTED TO APPLE HEALTH
Bring steps, workouts, and energy from Apple Health into the same place as your nutrition. You choose what to connect.
RIGHT THERE ON YOUR WRIST
See your calories and macros from your wrist. Apple Watch shows your day and syncs when your iPhone is nearby.
BUILT AROUND YOUR LIFE
Apple Health and Apple Watch, right alongside your nutrition. Your food log lives on your iPhone; optional features use online services. You choose what to connect.
The details on your dataGood habits. Honest pricing.
The everyday essentials are on us. Add Calvin Plus for AI photo logging and deeper insights.
Everything you need to find your rhythm.
$0/ month
No credit card. No account required.
Barcode scanning stays free. No scan limit.
Less manual work. A little more insight.
$49.99/ year
Billed yearly. Or $9.99 billed monthly.
3-day trial for eligible subscribers.
Prices shown in USD. Local pricing, trial eligibility, and terms appear before confirmation in the App Store. Plus is optional; the free features stay free. Subscriptions renew automatically unless canceled. Subscription help.
A little food for thought
A guide to understanding your needs and finding a starting point.
Read the guideThe bigger pictureWhat one number can’t tell you—and how to read your trend.
Read the guideSmarter targetsHow an adaptive target works, and why your logs matter.
Read the guideGood questions
No fine-print scavenger hunt. Here’s what you need to know.
All your questions, answeredYes. Barcode scanning, food search, full macros, weight trends, and Apple Health sync are included without a subscription. Calvin Plus is optional and adds features such as AI meal-photo scanning.
No. Start using Calvin without signing up. Sign-in is optional, and it does not currently back up or restore your food log.
Barcode scanning is free and unlimited. AI meal-photo estimates require Calvin Plus. Always review the foods and portions before saving: the results are estimates, not exact measurements.
Yes. Calvin connects to Apple Health with your permission and shows calories and macros on Apple Watch. The watch displays your day and syncs with your nearby iPhone; use your phone to log meals.
Your food log stays on your iPhone. Some optional features—such as food lookups, photo analysis, and connected services—send the data needed to work. The privacy policy explains each one.
Scan a barcode. Log a meal. Start a routine that feels like you—no account required.
Free to download. Optional Calvin Plus.
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