# ACLS Fast vs MedCalX

The clearest difference is price: MedCalX at Free against ACLS Fast's $3.99. MedCalX also leads on rating (3.8 vs 2.8) and ratings volume (31 vs 4). ACLS Fast's advantage is in-app purchases (none vs 3) and review sentiment (76% vs 46%). On update cadence, ads and device support there is nothing between them.

MedCalX is free to download; ACLS Fast costs $3.99 up front. MedCalX sells 3 one-off in-app purchases. ACLS Fast asks for nothing beyond the download.

MedCalX holds the better App Store score, 3.8 against 2.8. That said, the two scores are not equally well evidenced: MedCalX has 31 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 76% of ACLS Fast's written reviews are positive against 46% of MedCalX's, so the app with the better star average is not the one people write more warmly about.

ACLS Fast ships an update every 3 months, MedCalX every 5 months. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ACLS Fast | MedCalX |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [2.8 (4 ratings)](https://appshunter.io/ios/app/acls-fast/id654570275/reviews) | **[3.8 (31 ratings)](https://appshunter.io/ios/app/medcalx/id1041464932/reviews)** |
| Number of ratings | 4 | **31** |
| Positive reviews | **75.8% of reviews** | 45.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 20 MB | 45 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Crystal Clear Solutions](https://appshunter.io/developer/444062170) | [Ossus GmbH](https://appshunter.io/developer/286022405) |

## What reviewers say

### ACLS Fast

[App page](https://appshunter.io/ios/app/acls-fast/id654570275)

This app provides rapid guidance for ACLS 2020 guidelines, helping users quickly determine appropriate therapies through a question-based system. It includes information on rhythms, arrhythmias, acute coronary and stroke syndromes, and features a two-minute timer for code management.

**Highlights:** Question-based therapy guidance, Rhythms and arrhythmias management, Acute coronary and stroke syndrome protocols, Two-minute code timer with alarm, Interactive multiple-choice exams, Rapid diagnosis and treatment support

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

**In-app purchases:** none


### MedCalX

[App page](https://appshunter.io/ios/app/medcalx/id1041464932)

This medical calculator app provides healthcare professionals with a comprehensive tool for complex medical formulas, scores, and classifications. It offers an extensive library of over 300 medical calculations, patient management features, and sharing capabilities.

**Highlights:** Extensive medical formula library (300+), Patient management and data saving, Customizable workflows, Multiple result sharing options, Detailed information and references, US and SI unit support, iCloud synchronization for favorites

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MedCalc 3 Upgrade | Free | one-time |
| Doximity Registration | Free | one-time |
| MedCalX Unlock | $4.99 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 📱 Comprehensive collection of medical formulas and scores
- 🚀 Fast calculations and quick access
- 📚 Includes PubMed links and background information
- 🌍 Multi-language support

**What reviewers complain about**

- 💰 Paywalls for previously free calculators
- 🔄 Forced paid upgrades for existing users
- ❌ Missing many important medical scores
- ⏱️ Infrequent updates and maintenance
- 🐛 Frequent crashes and stability issues

**Reported bugs**

- App crashes on startup
- App crashes when taking patient photos
- App fails to open or becomes unresponsive
- Unable to restore previous purchases
- Doximity unlock feature not working

**Requested features**

- SCORE2 and other modern cardiovascular risk scores
- TRiP(cast) score
- Valve disease calculations
- Pediatric medication dosing calculators
- Electrolyte and fluid replacement calculations


## Frequently asked questions

### Is ACLS Fast free?

ACLS Fast costs $3.99, with no in-app purchases.

### Is MedCalX free?

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

### Which has better reviews, ACLS Fast or MedCalX?

MedCalX is rated higher. ACLS Fast averages 2.8 out of 5 from 4 ratings, while MedCalX averages 3.8 from 31 ratings.

### Do ACLS Fast or MedCalX have ads?

Neither ACLS Fast nor MedCalX shows ads.

### Which is updated more often, ACLS Fast or MedCalX?

ACLS Fast ships an update every 3 months, and MedCalX every 5 months. Most recently, ACLS Fast was updated on October 30, 2026 and MedCalX on October 29, 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.*