# Ketonix vs GKI Tracker

The clearest difference is rating: GKI Tracker at 3.8 against Ketonix's 2.3. GKI Tracker also leads on review sentiment (59% vs 20%). Ketonix's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 5 months). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GKI Tracker holds the better App Store score, 3.8 against 2.3. Both are backed by a comparable volume of ratings — 6 and 16 respectively. Written reviews point the same way: 20% of Ketonix's written reviews are positive against 59% of GKI Tracker's.

Ketonix ships an update every 5 weeks, GKI Tracker every 5 months. The most recent releases landed on October 8, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Ketonix | GKI Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (6 ratings)](https://appshunter.io/ios/app/ketonix/id1239051593/reviews) | **[3.8 (16 ratings)](https://appshunter.io/ios/app/gki-tracker/id1452955250/reviews)** |
| Number of ratings | 6 | **16** |
| Positive reviews | 20.0% of reviews | **59.1% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | **Free** | Ad-supported |
| Size | 90 MB | 36 MB |
| Requires iOS | **10.0** | 13.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [M Object Oriented Software Engineering AB](https://appshunter.io/developer/498983792) | [Matthias Mellouli](https://appshunter.io/developer/1704897147) |

## What reviewers say

### Ketonix

[App page](https://appshunter.io/ios/app/ketonix/id1239051593)

This app measures and analyzes breath ketone data from a connected Bluetooth device. It displays trendlines, moving averages, and allows for annotations of lifestyle changes to track progress. Video guides are available for various functions.

**Highlights:** Measure breath ketone data, Analyze ketone trends, Display moving averages, Add lifestyle annotations, Register Bluetooth device, Create user profiles

**Features:** macOS Compatibility

**In-app purchases:** none


### GKI Tracker

[App page](https://appshunter.io/ios/app/gki-tracker/id1452955250)

Track your glucose and ketone levels to calculate your GKI. Sync data with your health app, review your progress in history, and discover keto-friendly foods with a built-in grocery list manager.

**Highlights:** GKI calculation dashboard, Health app data sync, Historical progress tracking, Keto food discovery, Keto grocery list management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ketonix free?

Ketonix is free to download, with no in-app purchases.

### Is GKI Tracker free?

GKI Tracker is free to download, with no in-app purchases.

### Which has better reviews, Ketonix or GKI Tracker?

GKI Tracker is rated higher. Ketonix averages 2.3 out of 5 from 6 ratings, while GKI Tracker averages 3.8 from 16 ratings.

### Do Ketonix or GKI Tracker have ads?

GKI Tracker shows ads; Ketonix does not.

### Which is updated more often, Ketonix or GKI Tracker?

Ketonix ships an update every 5 weeks, and GKI Tracker every 5 months. Most recently, Ketonix was updated on October 8, 2026 and GKI Tracker on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*