CRON-O-Meter is a popular online diary for tracking your diet, exercise, and other health related information. We have a whole-food database that tracks over 60+ micronutrients, and support for specialized diets (ketogenic, paleo, vegan).

The app can also sync nutrition data and activity with the Apple Health App.

Cronometer can be used for free, but it also has optional in-app subscriptions to our Gold tier of service which offers an ad-free experience along with additional features.


The Gold subscriptions purchased here will be charged to your iTunes account.

By default, your subscription will auto-renew on a Monthly ($5.99 USD), Biannual ($24.99 USD), or Annual ($34.99 USD) term as per on your selection. You can change or cancel your subscription renewal under the iTunes Account settings. Your subscription will auto-renew on schedule unless you cancel with at least 24 hours prior to the renewal date.

By subscribing, you acknowledge and agree to the Terms of Use, and Privacy Policy.

What's New

Version 2.2.9

- Fixes an issue with some locales incorrectly handling decimal and comma inputs when logging food amounts
- Fixes an issue with chart values getting truncated
- Retiring Yahoo! Login support
- Other minor bug fixes

Ratings and Reviews

3.7 out of 5
89 Ratings
89 Ratings

Useful for keto and nutrition


I use both the app and desktop page and have found it took almost all the guess work out of the keto diet. I have found it's default guidelines to be comfortable for me, and my favorite thing is getting a close look at what I'm missing nutritionally. I suspect a few deficiencies in my diet and after tracking my habits I was sure what to supplement and what to eat more of. It's a good overall look at daily habits and trends and very very helpful for keto. I trust Dr. Mercola on many health topics so this almost feels like he's personally coaching me, because I trust that he had his developers use a well thought approach to the calculations involved with this. I have no complaints about finding product or inputting info. I don't expect perfection, it's a constantly changing market. I have been pleasantly surprised that many name brands I use are there. I find this app much more helpful and informative than my fitness pal. It's more personalized.

Good idea but very limited


The main reason for trying out this app is the fact that I’m trying the high fat/ ketogenic diet and this is the only app out there which I’ve found that can track net cabs directly. I live in Asia (Singapore).

First, the database is extremely limited at least for those of us living in Asia. I understand that in the case of a free product you’re asking me to contribute with food, but if I’m paying for it, that should be your job to have completed already. Takeaway #1: if you live in Asia, save your money

Second, the app (in its free version) really has A LOT of adds compared to, say, MyFitnessPal. Incidentally, from a pure database perspective, the free version of MyFitnessPal is A LOT more comprehensive, while it doesn’t make the app look like a add-laden website on which I wouldn’t spend 10 seconds
Takeaway #2: use only if you can tolerate adds everywhere (even when you enter food!)

Overall, I’m very disappointed. If the objective was to build an app to really help those who want to transition to a better diet, the developer should strike to provide a balance between value offered and level of ads used until the database is robust. Once it is, charging a fee is totally reasonable for a VERY USEFUL app.

I hope there will be positive changes in the future.


Why are you including LOUD ads?


I get that it’s free, so I’m ok with the ads. But I’m NOT ok with audible ads. Sometimes I want to record things in the app when it’s NOT convenient to have sound unexpectedly blasting out of my phone speakers. The app itself is great, but your ridiculous choice in advertising media just woke up my infant. I also previously purchased your paid version expecting to be able to share by daily diary, but all it did was remove the ads (any extra content/features apparently require a monthly subscription) so I “returned” it. I respectfully suggest you rethink your premium content tiering and the inclusion of audible advertising. The information provided by the app (and its design) is five stars.


Cronometer Software Inc
46 MB
Health & Fitness
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 12+ for the following:
Infrequent/Mild Alcohol, Tobacco, or Drug Use or References
© 2011 Cronometer Software Inc.
In-App Purchases
  1. Gold $5.99
  2. Gold Subscription $34.99
  3. Gold $24.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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