# iCPG vs CFR Obs Sim

The clearest difference is in-app purchases: CFR Obs Sim at none against iCPG's 2. CFR Obs Sim also leads on update cadence (every 2 weeks vs every 4 months). iCPG's advantage is iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. iCPG sells 2 in-app purchases, starting at $2.99 per month. CFR Obs Sim asks for nothing beyond the download.

iCPG ships an update every 4 months, CFR Obs Sim every 2 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | iCPG | CFR Obs Sim |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Subscription | — |
| Size | 85 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Class Publishing Ltd](https://appshunter.io/developer/884962940) | [Michael D. Thompson](https://appshunter.io/developer/1866976911) |

## What reviewers say

### iCPG

[App page](https://appshunter.io/ios/app/icpg-the-jrcalc-guidelines/id1062577568)

Access the UK ambulance clinical practice guidelines offline after subscribing. Features real-time updates, bookmarking, and dosage filtering by age and condition. Includes sections on general guidance, resuscitation, medical, trauma, and more.

**Highlights:** Offline access to JRCALC guidelines, Real-time guidance updates, Bookmark important guidelines, Filter drug dosages by age/condition, Quick look view of algorithms/diagrams

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iCPG Subscription | $2.99 | per month |
| iCPG Subscription | $30.99 | per year |


### CFR Obs Sim

[App page](https://appshunter.io/ios/app/cfr-obs-sim/id6770991870)

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

**In-app purchases:** none


## Frequently asked questions

### Is iCPG free?

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

### Is CFR Obs Sim free?

CFR Obs Sim is free to download, with no in-app purchases.

### Do iCPG or CFR Obs Sim have ads?

Neither iCPG nor CFR Obs Sim shows ads.

### Which is updated more often, iCPG or CFR Obs Sim?

iCPG ships an update every 4 months, and CFR Obs Sim every 2 weeks. Most recently, iCPG was updated on November 6, 2026 and CFR Obs Sim on October 31, 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.*