# MedCalX vs Rheumatools John Libbey E.

The clearest difference is in-app purchases: Rheumatools John Libbey E. at none against MedCalX's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MedCalX sells 3 one-off in-app purchases. Rheumatools John Libbey E. asks for nothing beyond the download.

MedCalX ships an update every 5 months, Rheumatools John Libbey E. every 8 months. The most recent releases landed on September 25, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | MedCalX | Rheumatools John Libbey E. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (30 ratings)](https://appshunter.io/ios/app/medcalx/id1041464932/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 45.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 61 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Ossus GmbH](https://appshunter.io/developer/286022405) | [John Libbey Eurotext](https://appshunter.io/developer/503890972) |

## What reviewers say

### 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


### Rheumatools John Libbey E.

[App page](https://appshunter.io/ios/app/rheumatools-john-libbey-e/id1271348064)

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

**In-app purchases:** none


## Frequently asked questions

### Is MedCalX free?

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

### Is Rheumatools John Libbey E. free?

Rheumatools John Libbey E. is free to download, with no in-app purchases.

### Do MedCalX or Rheumatools John Libbey E. have ads?

Neither MedCalX nor Rheumatools John Libbey E. shows ads.

### Which is updated more often, MedCalX or Rheumatools John Libbey E.?

MedCalX ships an update every 5 months, and Rheumatools John Libbey E. every 8 months. Most recently, MedCalX was updated on September 25, 2026 and Rheumatools John Libbey E. on September 12, 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.*