KetoLogger will help you quickly and easily log and graph your ketone and glucose readings.

Enter your glucose and ketone readings with ease via the simple to use entry screens. Both mg/dL and mmol/L glucose units are supported.  

You can import the CSV files from the KetoMojo meter app*.

The graph tab helps you visualize your glucose vs. ketone readings with a line graph. Quickly see how you're doing with a glance. Jump quickly between date ranges to get the best picture of your progress.

The history view lets you see your readings. Either glucose, ketones or using a "Both" view. In the Both view matching glucose/ketones readings are paired and the GKI is calculated.

Easily export all your readings in CSV format (Two formats to chose from).

A "backup manager" maintains the last few versions of the database. These can be restored or exported. Share your database between devices.

If there's a feature that's missing please let us know at:

GKI graphing is in the works (not sure when it will be done) but was originally skipped because I figured that graphing ketones vs glucose creates a kind of visual GKI. See my thought on GKI here:

Keto Logger was inspired when a family member was following a ketogenic diet for health reasons. For a programmer logging and graphing ketones in a spreadsheet is not too challenging. For most other people probably a huge challenge. Keto Logger was created so that anyone with an iOS device can log and graph their ketone and glucose readings. (Also I personally have been following a low carb/ ketogenic diet since about 2003.)

(* Note that when I contacted the KetoMojo folks about importing their CSV files into Keto Logger they did not respond. If import fails then please send a mail to The fix to this last format change, adding a UniqueID column, was submitted to the store for app review less than 24 hours after a user reported it.)

What’s New

Version 1.1.3

- Request iOS to display Keto Logger with Light interface if Dark Mode is selected.
- Support iOS 9.3 and above.

Ratings and Reviews

4.9 out of 5
216 Ratings

216 Ratings

RainbowPeacock7 ,

Simple Great App!

I make it a rule not to buy apps that do not offer free samples, and this one doesn't. I hesitated for a few days before I hit the "Buy" button, but I'm glad I did.

I had been searching for an app to log blood ketone and glucose levels. I've been on a low carb diet. I wanted to 1) make sure I'm in ketosis, which is my goal of being on a low carb diet, and 2) measure how much impact certain food has on my glucose/ketone levels.

I searched and tried a number of apps (free and freemiums) but none of them were satisfactory. Some require a lot of taps and key strokes. Others are designed for people with diabetes, which I am not, and lacking ability to track ketone levels. Most apps that have "keto-" in their names focus on diet, asking you to enter a whole bunch of information on what you eat. I don't care any of that. I have a ketone/glucose meter so I know if I am in ketosis or not by measuring the blood ketone level, without having to enter all the food data.

This app addresses my needs exactly. As the screenshots show, it has easy "dial" to enter values with time of entry, displays graphs to see the ups and downs. Very easy to use. Minimal taps required.

A few things to be desired in future updates... 1) Connectivity to iOS's Health App. 2) Option to enter food intake (meals & snacks) to track what triggers changes in ketone/glucose levels.

But overall, it's a perfect app. Highly recommended

BrightGTR ,

Worth it

Experimenting with low carb, keto, and fasting. This app provides a visual representation, and helps me see important relations between
(On the one hand)
—my nutrition (or lack of!) in the last few hours, and
—how I feel

And (on the other)

—my blood sugar, and
—my ketone (alternate fuel/fuel from fat) levels

With this, in time, I hope to have a strong internal sense of these.

So, it’s incredibly important, what this app helps us do. And I’m pleased with how it does it.

One suggestion might be adding the readings for hematocrit and hemoglobin, which these blood tests also provide. Another would be allowing the app to sync with keto mojo, et al, test company apps. . .

And this brings me to another point. I suggested this to the maker of the app. He was incredibly responsive. And said he was already on one of those. My hat is off to him.

I have no relation, financial or otherwise, to the app or it’s maker. But I’ve found it useful. And given that the costs of a blood test or two exceed the cost of this app, I don’t think you can go wrong in using it to track many of these tests. It is the best app I’ve found to do so. And in doing so, it does not require sharing a lot of personal info either

Developer Response ,


Thanks for the very kind review. Version 1.1.0 has the ability to import from Keto Mojo (the formats I'm aware of or submit a sample file if it has changed). Hematocrit and hemoglobin aren't yet supported but some of the work "under the hood" for this last update is paving the way for addition of other reading types.

A2Fords ,

KetoLogger is meets the need

KetoLogger is a pretty simple application, but it gets the job done. It would be nice if an additional graft was added to show the GKI (Glucose-Ketone Index) over the ranges such as:
Anything above 9 means your body has not transitioned into a fat-burning state.
A 6-9 GKI demonstrates a low level of ketosis: This is appropriate for those who want to lose weight or maintain optimal health.
A 3-6 GKI demonstrates moderate levels of ketosis: This is appropriate for addressing many common metabolic diseases including insulin resistance, Type 2 diabetes, or obesity.
A less than 3 GKI is a high level of ketosis: This is typically used for addressing epilepsy and cancers. Entering this high level of ketosis periodically each year can be beneficial for anyone hoping to use ketosis for disease prevention.


Uncomplicated Solutions Inc.
21.4 MB

Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Medical/Treatment Information


  • Family Sharing

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

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