# JRCALC PLUS vs ISTUMBLE

The clearest difference is review sentiment: JRCALC PLUS at 23% against ISTUMBLE's 0%. JRCALC PLUS also leads on update cadence (every 2 months vs every 10 months). 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.

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

## The numbers

| Metric | JRCALC PLUS | ISTUMBLE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **23.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 270 MB | 38 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Class Publishing Ltd](https://appshunter.io/developer/884962940) | [MANGAR INTERNATIONAL LIMITED](https://appshunter.io/developer/1449708947) |

## What reviewers say

### JRCALC PLUS

[App page](https://appshunter.io/ios/app/jrcalc-plus/id1317027458)

Access up-to-date national and regional prehospital care guidelines for UK professionals. This app provides essential clinical information, including medicines tables and algorithms, for registered trust members. It works offline, ensuring access to critical guidance even without a signal.

**Highlights:** Complete JRCALC Guidelines, Regional and local guidance, Clinical Notices for trusts, Medicines tables, algorithms, and advice, Offline functionality

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

**In-app purchases:** none


### 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 JRCALC PLUS free?

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

### Is ISTUMBLE free?

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

### Do JRCALC PLUS or ISTUMBLE have ads?

Neither JRCALC PLUS nor ISTUMBLE shows ads.

### Which is updated more often, JRCALC PLUS or ISTUMBLE?

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

---

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