KETOSCAN vs GKI Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KETOSCAN
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.
- Breath ketone measurement
- Body fat decomposition rate
- Ketogenic diet support
- Health app integration
- Scientific diet tracking
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Equipped with a high-precision sensor, it measures the state of the ketone by simple breathing The ketone meter. 1. What is KETOSCAN? KETOSCAN is the first portable acetone gas analyzer in Korea, Acetone, which is one of the ketone bodies produced when decomposing body fat, flows through the blood vessels and is discharged through the lungs through the respiration. It is a product that can measure the blood ketone concentration and the body fat decomposition rate by measuring the concentration of the breathing acetone gas. 2. Who needs a KETOSCAN? - Low Carb High Fat Diet (LCHF / Ketogenic Diet) When you need to measure your ketone production! - When you lose body fat through low-calorie diet, check for the scientific diet check that only the body fat is decomposed not the muscle! - For the purpose of ketosis check! 3. Integration with the Health app - KETOSCAN read data from health app such as 'Active Energy', 'Dietary Energy', 'Weight' - It is used for your records. - You can allow to read at Settings -> Privacy -> Health -> KETOSCAN
GKI Tracker
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.
- GKI calculation dashboard
- Health app data sync
- Historical progress tracking
- Keto food discovery
- Keto grocery list management
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- Enter your Glucose and your Ketones to find out your GKI in your dashboard. - Sync your Glucose Level with the Health App - Find all your previous entries in your history and see your improvements. - Discover Keto foods and manage your Keto Grocery list
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | KETOSCAN | GKI Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (15 ratings) | 3.6 (14 ratings) — better |
| Positive reviews | 31.6% of reviews | 59.1% of reviews — better |
| Number of ratings | 15 — better | 14 |
| Update frequency | Every 4 weeks — better | Every 5 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.1 |
| Further details — not scored | ||
| Size | 53 MB | 36 MB |
| Age rating | 12+ | 12+ |
| Developer | SENTECH KOREA CORP | Matthias Mellouli |
Customer experience
KETOSCAN
GKI Tracker
In-app purchases
KETOSCAN
No in-app purchases
GKI Tracker
No in-app purchases
