# KETOSCAN vs Nurse Hatty

The clearest difference is update cadence: KETOSCAN at every 4 weeks against Nurse Hatty's every 14 months. KETOSCAN also leads on ratings volume (16 vs 4) and iOS requirement (12.0 vs 15.6). Nurse Hatty's advantage is rating (3.0 vs 2.6) and review sentiment (50% vs 32%). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Nurse Hatty holds the better App Store score, 3.0 against 2.6. Both are backed by a comparable volume of ratings — 16 and 4 respectively. Written reviews point the same way: 32% of KETOSCAN's written reviews are positive against 50% of Nurse Hatty's.

KETOSCAN ships an update every 4 weeks, Nurse Hatty every 14 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KETOSCAN | Nurse Hatty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (16 ratings)](https://appshunter.io/ios/app/ketoscan/id1446527194/reviews) | **[3.0 (4 ratings)](https://appshunter.io/ios/app/nurse-hatty/id1569214799/reviews)** |
| Number of ratings | **16** | 4 |
| Positive reviews | 31.6% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 14 months |
| Monetization | Free | Free |
| Size | 53 MB | 15 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [SENTECH KOREA CORP](https://appshunter.io/developer/1446527193) | [Hatty, Inc.](https://appshunter.io/developer/1569214801) |

## 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


### Nurse Hatty

[App page](https://appshunter.io/ios/app/nurse-hatty/id1569214799)

Access product information, including guides, usage instructions, and video links. Track progress on select items to support your diet and exercise goals. Designed for adults interested in health and wellness products.

**Highlights:** Product guides, Usage instructions, How-to-use video links, Progress trackers, Package inserts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KETOSCAN free?

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

### Is Nurse Hatty free?

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

### Which has better reviews, KETOSCAN or Nurse Hatty?

Nurse Hatty is rated higher. KETOSCAN averages 2.6 out of 5 from 16 ratings, while Nurse Hatty averages 3.0 from 4 ratings.

### Do KETOSCAN or Nurse Hatty have ads?

Neither KETOSCAN nor Nurse Hatty shows ads.

### Which is updated more often, KETOSCAN or Nurse Hatty?

KETOSCAN ships an update every 4 weeks, and Nurse Hatty every 14 months. Most recently, KETOSCAN was updated on November 2, 2026 and Nurse Hatty on November 3, 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.*