# AHA ACLS vs ABG Calculator

AHA ACLS and ABG Calculator both sit at 4.9 stars, but that hides the real split: 100% of ABG Calculator's written reviews are positive against 26% of AHA ACLS's. ABG Calculator also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.1). AHA ACLS's advantage is price (Free vs $9.99) and ratings volume (370 vs 2). On rating, update cadence, ads and device support there is nothing between them.

AHA ACLS is free to download; ABG Calculator costs $9.99 up front. AHA ACLS sells 1 in-app purchase, starting at $3.99 per year. ABG Calculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for AHA ACLS against 5.0 for ABG Calculator. That said, the two scores are not equally well evidenced: AHA ACLS has 370 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 26% of AHA ACLS's written reviews are positive against 100% of ABG Calculator's.

AHA ACLS ships an update every 2 months, ABG Calculator every 3 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AHA ACLS | ABG Calculator |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.9 (370 ratings)](https://appshunter.io/ios/app/aha-acls/id1506944443/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abg-calculator/id6743676456/reviews)** |
| Number of ratings | **370** | 2 |
| Positive reviews | 26.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Subscription | **Paid** |
| Best chart rank | **#48** | — |
| Size | 48 MB | 8 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Massachusetts General Hospital](https://appshunter.io/developer/376928206) | [SAGA Virtual Tecnologia Ltda](https://appshunter.io/developer/1455930511) |

## What reviewers say

### AHA ACLS

[App page](https://appshunter.io/ios/app/aha-acls/id1506944443)

**Currently charting:** #48 Top Grossing · Medical (US App Store)

This app provides clinicians with a digital tool to assist in running cardiac arrest codes and delivering advanced cardiac life support (ACLS) at the bedside. It features the latest AHA recommendations and includes intuitive access to algorithms, drug dosing, and timers for efficient patient care.

**Highlights:** 4 ACLS algorithms (cardiac arrest, tachycardia, bradycardia, post-arrest), Latest 2025 AHA ACLS content, Drug therapy and dosing, Easy-to-read timers, CPR and epinephrine logging, Rapid transition to post-arrest care

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ACLS Pro | $3.99 | per year |

**What reviewers like**

- ✅ Accurate, up-to-date AHA ACLS algorithms
- ⏱️ Built-in timers and counters for code management
- 👍 User-friendly, intuitive interface
- 🏥 Trusted by Harvard/MGH and American Heart Association
- 📋 Helpful for documentation and PCR completion

**What reviewers complain about**

- 💰 Subscription paywall on previously free app
- 🚨 Dangerous surprise paywall during active codes
- ⚠️ No warning before transition to paid model
- 🔐 Requires payment even for basic ACLS information
- 😤 Perceived greed from wealthy organizations (MGH/AHA)

**Reported bugs**

- App fails to load information despite subscription payment
- Users locked out of app mid-code
- Unexpected app crashes during critical moments

**Requested features**

- Multiple log storage with dates
- More detailed code logging with event documentation (IO access, medications, rhythms)
- End code button and pause compressions feature
- Real-time log tracking for back-charting
- LVAD algorithm inclusion


### ABG Calculator

[App page](https://appshunter.io/ios/app/abg-calculator/id6743676456)

This medical tool quickly analyzes arterial blood gas results for healthcare professionals. It calculates acid-base status, anion gap, and compensation, offering comprehensive diagnoses offline. Save and share patient results for efficient clinical decision-making.

**Highlights:** Offline arterial blood gas analysis, Instant acid-base disorder determination, Anion gap and compensation assessment, Flexible unit options, Save and share patient results, Results history and search

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

**In-app purchases:** none


## Frequently asked questions

### Is AHA ACLS free?

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

### Is ABG Calculator free?

ABG Calculator costs $9.99, with no in-app purchases.

### Which has better reviews, AHA ACLS or ABG Calculator?

ABG Calculator is rated higher. AHA ACLS averages 4.9 out of 5 from 370 ratings, while ABG Calculator averages 5.0 from 2 ratings.

### Do AHA ACLS or ABG Calculator have ads?

Neither AHA ACLS nor ABG Calculator shows ads.

### Which is updated more often, AHA ACLS or ABG Calculator?

AHA ACLS ships an update every 2 months, and ABG Calculator every 3 months. Most recently, AHA ACLS was updated on October 27, 2026 and ABG Calculator on October 24, 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.*