# NCalc vs ISTUMBLE

The clearest difference is in-app purchases: ISTUMBLE at none against NCalc's 1. ISTUMBLE also leads on ads (none vs shown). NCalc's advantage is update cadence (every 2 months vs every 10 months). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. NCalc sells 1 one-off in-app purchase. ISTUMBLE asks for nothing beyond the download.

NCalc ships an update every 2 months, ISTUMBLE every 10 months. The most recent releases landed on August 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | NCalc | ISTUMBLE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ncalc/id1291494926/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 38 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Lindum Medical Ltd](https://appshunter.io/developer/1092857686) | [MANGAR INTERNATIONAL LIMITED](https://appshunter.io/developer/1449708947) |

## What reviewers say

### NCalc

[App page](https://appshunter.io/ios/app/ncalc/id1291494926)

Calculate the National Early Warning Score (NEWS) quickly and accurately. This app supports both original NEWS and NEWS2 scoring systems, updating the score in real-time as data is entered. It also allows for adding notes to each score to align with local policies.

**Highlights:** NEWS and NEWS2 scoring, Real-time score updates, Tap for recommended actions, Add custom notes, Error-free calculations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NCalc - remove advertising | $1.99 | one-time |


### ISTUMBLE

[App page](https://appshunter.io/ios/app/istumble/id1449708948)

This medical assessment tool helps care providers determine the best course of action after a fall. It guides decisions on whether to lift a fallen person or call for an ambulance, aiming to reduce the time a person remains on the floor. The app is accredited for NHS use and works with lifting cushions for safe patient handling.

**Highlights:** Fall assessment algorithm, Decision support for lifting or ambulance, NHS accredited tool, Works with Mangar Lifting Cushions, Reduces time on floor, Safe and dignified lifting

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

**In-app purchases:** none


## Frequently asked questions

### Is NCalc free?

NCalc is free to download, with in-app purchases available.

### Is ISTUMBLE free?

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

### Do NCalc or ISTUMBLE have ads?

NCalc shows ads; ISTUMBLE does not.

### Which is updated more often, NCalc or ISTUMBLE?

NCalc ships an update every 2 months, and ISTUMBLE every 10 months. Most recently, NCalc was updated on August 23, 2026 and ISTUMBLE on September 22, 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.*