# AHS EMS vs CritiCalc

The clearest difference is update cadence: CritiCalc at every 2 weeks against AHS EMS's every 11 months. AHS EMS's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

AHS EMS ships an update every 11 months, CritiCalc every 2 weeks. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | AHS EMS | CritiCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ahs-ems/id413312484/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 34.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 28 MB | 53 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [The Essential Talk Network Incorporated](https://appshunter.io/developer/357541284) | [Jason Richmond](https://appshunter.io/developer/1659125082) |

## What reviewers say

### AHS EMS

[App page](https://appshunter.io/ios/app/ahs-ems/id413312484)

Access essential Alberta Health Services Medical Control Protocols for pre-hospital emergency medical providers. Includes adult and pediatric algorithms, reference materials, and pharmacology information.

**Highlights:** Alberta Health Services Protocols, Medical Control, Medical First Response, Incident Response, Adult and pediatric algorithms, Reference material, Pharmacology information

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

**In-app purchases:** none


### CritiCalc

[App page](https://appshunter.io/ios/app/criticalc/id1659125080)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AHS EMS free?

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

### Is CritiCalc free?

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

### Do AHS EMS or CritiCalc have ads?

Neither AHS EMS nor CritiCalc shows ads.

### Which is updated more often, AHS EMS or CritiCalc?

AHS EMS ships an update every 11 months, and CritiCalc every 2 weeks. Most recently, AHS EMS was updated on September 20, 2026 and CritiCalc on September 13, 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.*