# KETOSCAN vs GKI Tracker

The clearest difference is rating: GKI Tracker at 3.6 against KETOSCAN's 2.7. GKI Tracker also leads on review sentiment (59% vs 32%). KETOSCAN's advantage is ads (none vs shown) and update cadence (every 4 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, 3.6 against 2.7. Both are backed by a comparable volume of ratings — 15 and 14 respectively. Written reviews point the same way: 32% of KETOSCAN's written reviews are positive against 59% of GKI Tracker's.

KETOSCAN ships an update every 4 weeks, GKI Tracker every 5 months. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | KETOSCAN | GKI Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (15 ratings)](https://appshunter.io/ios/app/ketoscan/id1446527194/reviews) | **[3.6 (14 ratings)](https://appshunter.io/ios/app/gki-tracker/id1452955250/reviews)** |
| Number of ratings | **15** | 14 |
| Positive reviews | 31.6% of reviews | **59.1% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Monetization | **Free** | Ad-supported |
| Size | 53 MB | 36 MB |
| Requires iOS | **12.0** | 13.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [SENTECH KOREA CORP](https://appshunter.io/developer/1446527193) | [Matthias Mellouli](https://appshunter.io/developer/1704897147) |

## What reviewers say

### KETOSCAN

[App page](https://appshunter.io/ios/app/ketoscan/id1446527194)

This device measures ketone levels through breath analysis, indicating body fat decomposition. It's ideal for those on ketogenic diets or seeking to monitor fat loss scientifically. Data can be integrated with the Health app for comprehensive tracking.

**Highlights:** Breath ketone measurement, Body fat decomposition rate, Ketogenic diet support, Health app integration, Scientific diet tracking

**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 KETOSCAN free?

KETOSCAN 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, KETOSCAN or GKI Tracker?

GKI Tracker is rated higher. KETOSCAN averages 2.7 out of 5 from 15 ratings, while GKI Tracker averages 3.6 from 14 ratings.

### Do KETOSCAN or GKI Tracker have ads?

GKI Tracker shows ads; KETOSCAN does not.

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

KETOSCAN ships an update every 4 weeks, and GKI Tracker every 5 months. Most recently, KETOSCAN was updated on October 10, 2026 and GKI Tracker on October 8, 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.*