# Ketonix — Ketonix Breath Ketone Analyzer

> Breath ketone data measurement and analysis software for a Bluetooth device. (iPhone/iPad app by M Object Oriented Software Engineering AB.)

- Source: https://appshunter.io/ios/app/ketonix/id1239051593 (this page in markdown: same URL + `.md`)
- Developer: [M Object Oriented Software Engineering AB](https://appshunter.io/developer/498983792)
- Category: Health & Fitness, Medical
- Price: Free
- Rating: 2.30/5 from 6 App Store ratings · 35 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 90 MB
- Languages: American English, German (Germany), Swedish
- Released: 2017-05-24
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ketonix/id1239051593/reviews.md

## What is Ketonix?

Ketonix Software for measure and analyze breath ketone data from a Ketonix® Bluetooth® device.

The charts will display a trendline, moving average (MAV) and a possibility to add annotations for lifestyle changes.

Here are some video guides demonstrating functions of the app.

Register Device https://youtu.be/fnBHSOcu91Y
Quickstart https://youtu.be/DdULLGAjd14
Create Profile https://youtu.be/5-xRkqU4ap0
Diet Workflow https://youtu.be/L-u04j_Wbgw
Import Recipe https://youtu.be/vV1Z2hKfOX4


Privacy Policy is found at https://www.ketonix.com/PrivacyPolicyKetonixBluetoothApp.pdf

## Key features

- Measure breath ketone data
- Analyze ketone trends
- Display moving averages
- Add lifestyle annotations
- Register Bluetooth device
- Create user profiles

## Recent user reviews (10 of 35)

All indexed reviews: https://appshunter.io/ios/app/ketonix/id1239051593/reviews.md

### 1/5 — Both app and device are a waste of money

*2025-01-15, version 2.0.21*

The app doesn’t work well. It’s hard to understand how to use it and it doesn’t give accurate readings. The device is expensive and you can tell they don’t develop this product. The app has had zero updates in over two years.

### 1/5 — Such a shame.

*2023-12-21, version 2.0.21*

I think the machine itself works well. I hope. But the app is so frustrating. Every time I go to use it, I have to turn my entire phone off and back on again and then start the app all over again for it to read the meter. Sometimes it stops in mid read. I want to keep the machine and not send it back because I like doing the breath rather than poking my fingers but unless they improve the app, it really makes it useless or very difficult and it shouldn’t be this hard. Seems like nobody is really monitoring the ratings on the app or what anybody is saying.

### 5/5 — Great app!

*2023-05-31, version 2.0.13*

Works well.  Easy to use.  Software support is excellent and very responsive.  This is my second Ketonix.  Really cool not to be tethered to the computer any longer.  Great work Ketonix!  Nailed it.

### 5/5 — Working great for me

*2023-02-22, version 2.0.13*

I have my profile set up and save my data consistently. 

As for the Ketonix breathalyzer, I was doing that all wrong. Directions!

Read the directions and ensure you are completely emptying your lungs. No need to inhale first! 

The app is easy to use and being able to analyze day, week, month, year and customize your results are fantastic.

### 1/5 — Bad customer support

*2023-01-08, version 2.0.12*

I bought the Ketonix professional. The app won’t open the additional features I paid for. I contacted Ketonix and they told me that it’s already working (????). No it isn’t sorry. That’s a waste of at least 60$. Their customer support leaves something to be desired. At least I can still measure ketones.

### 1/5 — Why round input data!?

*2022-10-17, version 2.0.11*

One of the best features of the original version of the app was the ability to input body fat and weight measurements, etc with decimal points.

Now they are being rounded!!!

Given that the signals for body fat measurement and weight can be noisy unnecessary rounding affects the trend analysis even more.

Please bring back full precision on your app and database!!!!

### 1/5 — Functional (but room for improvement)

*2022-07-01, version 2.0.8*

Most recent update: I’m curious as to the purpose of the “low carb diet” Check box on the measure screen. If I don’t check it all readings are zero (ie. It doesn’t measure anything, I even tried it with pure acetone vapour, still zero). Also if I do check it I seem to get much higher readings than I would have with the previous version. I’m now questioning the results.

### 5/5 — Does what it's supposed to do

*2022-06-27, version 2.0.8*

Not sure what all the negativity is about. If all the app did was measure breath acetone levels and chart it, that alone is worth 5 stars imo (but it does other things as well). Device works perfectly for me. Just make sure you charge it completely before using, turn your phone's Bluetooth on and you're good to go.

### 2/5 — App very buggy

*2021-11-26, version 2.0.4*

I like the app and the way it works but its so buggy. I would say every 3rd time I use it I have to reboot my phone. The circular meter starts doing circles like some crazy roulette wheel and the only way to get it back to normal is to reboot my phone. As you can imagine this is very annoying! Hopefully they will have an upgrade to fix this in the future.

### 1/5 — Not usable

*2021-07-13, version 2.0.4*

Wow. I wish I had read these reviews before purchasing. Spent $100 for an app that is basically unusable.

I was able to get this to display some data from a reading, but I have 0 confidence that it means anything reliable.

There are no obvious units, measurements are highly erratic and change by a factor of 2 in back to back measurements. It says ppm in one place, but that measurement doesn’t match with the chart which is unit-less. 

There is no way to view saved data after 7-days. The app is full of greyed out buttons. Such as the “custom” button on the analysis tab that looks like it might show past data but instead does nothing. There is no place to perhaps upgrade the setting or something.

This app is a prototype at best for proof of concept only. Not for use by a paying customer.

I’m a scientist and am accustomed to using technical equipment, so I am willing to deal with somewhat inscrutable equipment, but this doesn’t even allow me to get to the point of useful data in the first place.

## Frequently asked questions about Ketonix

### What does the Ketonix app do?

The Ketonix app measures and analyzes breath ketone data from a Ketonix® Bluetooth® device. It helps users track their ketone levels over time by displaying trendlines and moving averages. You can also add annotations to lifestyle changes to see their impact.

### What are the key features of the Ketonix app?

Key features include measuring and analyzing breath ketone data, displaying trendlines and moving averages, and the ability to add annotations for lifestyle changes. The app also supports device registration and user profile creation.

### Is the Ketonix app free to use?

Yes, the Ketonix app is free to use. Based on the provided information, there are no in-app purchases or advertisements mentioned, indicating it is a free application.

### What devices is the Ketonix app compatible with?

The Ketonix app is designed to work with a Ketonix® Bluetooth® device. Specific compatibility details for operating systems (iOS/Android) are not provided in the description, but it requires a Bluetooth connection to the Ketonix hardware.

### How can I use the Ketonix app for my diet?

The app allows you to measure and analyze your breath ketone data, which is crucial for monitoring your progress on a ketogenic diet. By adding annotations for lifestyle changes, such as dietary adjustments or exercise, you can observe how these affect your ketone levels and optimize your diet workflow.

## Version history (last 5 releases)

### 2.0.21 — 2023-11-09

Bugfix saving data.

### 2.0.20 — 2023-11-06

Added countdown for analysis.

### 2.0.14 — 2023-10-23

Fixed profile attributes and links to new website.

### 2.0.13 — 2023-01-15

Small bugfixes.

### 2.0.12 — 2022-11-02

This is a bugfix release

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## More apps by M Object Oriented Software Engineering AB

- [KetonixGO](https://appshunter.io/ios/app/ketonixgo/id1465875336)
- [P:E Calc](https://appshunter.io/ios/app/pe-calc/id1578153111)

All apps by M Object Oriented Software Engineering AB: https://appshunter.io/developer/498983792

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*