Lose weight, build muscle, or maintain your weight with an eating plan that fits your life. CalZen helps you figure out how much to eat, plan meals around foods you like, and see your progress over time.
Over 3 million downloads worldwide.
Food diary and scanner
– Log food with a photo, your voice, or a text entry
– Scan packaged foods to add their calories and macros
– Track calories, protein, carbs, fat, and fiber by meal and by day
If a product isn’t in the database, take photos of the package and nutrition facts panel to add it.
Weekly meal plans
– Get a seven-day meal plan with portions tailored to your calorie and macro goals
– Tell us about your dietary restrictions, foods you don’t like, and favorite cuisines
– Get recipes that fit your cooking skills and the time you have
– Follow recipes with photos and step-by-step instructions, then log meals straight to your diary
– Shop for the week with one grocery list and check off items as you go
Weight and progress
– Log your weight and body measurements to see how you’re progressing toward your goal
– Use weight charts to see your progress over time
– Review your calorie and macro stats to see how your eating lines up with your targets
– Save progress photos to see how your body changes over time
GLP-1 diary
Keep a record of your prescribed medication in the same app you use for food and weight.
– Log doses
– Set medication reminders
– Note how you feel and review past entries
Track your water intake, set a daily goal, and look back at your history.
Connect Apple Health to see steps, workouts, and active calories burned alongside your food diary.
AI food analysis requires a subscription. Each weekly meal plan is a separate one-time purchase with no automatic renewal.
Questions or ideas? Email hello@calzen.ai
Terms of Use: https://calzen.ai/terms
Privacy Policy: https://calzen.ai/privacy
CalZen is not a medical app or medical device. It does not diagnose or treat medical conditions and does not replace professional medical advice. Calorie counts and nutritional values are estimates. Always consult your doctor before changing your diet, exercise routine, medication, or dosage. Follow your doctor’s instructions for your medication and dosage.
This app is really cool, I really liked it and will continue to use it. It's very convenient and takes little time to calculate calories and fat.
Developer Response
Awesome to hear you’re loving it! Really glad CalZen makes tracking so quick and easy for you.
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ssaayyrreexx
The Calzen app is great, but it used to be free, and now it has become paid — before you could easily track calories and macros without a subscription, but now you have to pay for full access
Developer Response
Thanks for the review, and glad you’re enjoying the app. Just to explain — the photo‑based calorie tracking uses AI processing on our servers, which is why full access now requires a subscription. You still get some free scans to test things out, and we’re always working on improving the balance. If you have questions or ideas, feel free to reach out at calzen@42apps.io.
Add-ons
AyissaB
1) Can you add option to make a photo of the food (yoghurt for example) and then add in grams the portion (if i make photo of yoghurt and then trying to edit portion, there is no option of portion in grams2) Could you add trial option (like 3 days and then subscription)?
Developer Response
Ugh, frustrating when features aren't just right! The idea to photograph food and have gram options is awesome—let's solve this together! I’ll pass this feature request to our team for future updates. Good news about the trial period: we’re already working on enhancing it. If you've got more ideas or run into any issues, just email us at calzen@42apps.io. You're helping us improve CalZen, and we’re committed to getting better for you.
Misleading functionality, full of errors
Alexmart15
The app claims to recognize food and calculate calories, proteins, fats, and carbs from a photo — but it simply doesn’t work. The recognition is inaccurate, and the results are full of mistakes. For someone who carefully tracks nutrition, such errors are unacceptable. I feel misled and disappointed. I tried to request a refund, but it was denied. I do not recommend this app.
Developer Response
Sorry to hear the app didn’t meet your expectations. Our AI works by analyzing your actual meal photos—not from a static food list—which means lighting, angles, and ingredient visibility can really impact the results. For better accuracy, try snapping photos in bright light and include something like a fork or your hand in the shot for scale. We’re always improving, and your feedback helps. If you’re open to it, send a sample photo to calzen@42apps.io so we can look into it and help directly.
Take the guesswork out of your week with meals planned around your calorie goal and tastes.
– Your weekly menu accounts for dietary restrictions, favorite cuisines, and how much time you have to cook
– Each recipe includes a photo, portion sizes, and step-by-step instructions. Get one shopping list for the week and log meals straight to your diary
– Apple Health sync now sends your food and water entries to Health and keeps weight and body measurements in sync
– Adding a product from its label? The camera finds the nutrition facts panel and takes the photo when you hold steady
Got an idea, or something feels off? Email us at hello@calzen.ai and we'll sort it out.
Version 2.14.0
The developer, 42apps, 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:
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Health & Fitness
Contact Info
User Content
Identifiers
Usage Data
Diagnostics
Other Data
Privacy practices may vary based, for example, on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Provider
42apps, TOO
Size
147 MB
Category
Health & Fitness
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.