# NefroCalc vs MedCalX

The clearest difference is review sentiment: NefroCalc at 100% against MedCalX's 46%. NefroCalc also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 3). MedCalX's advantage is ratings volume (31 vs 1). 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. NefroCalc asks for nothing beyond the download.

NefroCalc holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: MedCalX has 31 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of NefroCalc's written reviews are positive against 46% of MedCalX's.

NefroCalc ships an update every 8 months, MedCalX every 5 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | NefroCalc | MedCalX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nefrocalc/id466002518/reviews)** | [3.8 (31 ratings)](https://appshunter.io/ios/app/medcalx/id1041464932/reviews) |
| Number of ratings | 1 | **31** |
| Positive reviews | **100.0% of reviews** | 45.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 45 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Oscar Sosa](https://appshunter.io/developer/466002525) | [Ossus GmbH](https://appshunter.io/developer/286022405) |

## What reviewers say

### NefroCalc

[App page](https://appshunter.io/ios/app/nefrocalc/id466002518)

This medical app provides quick calculations for glomerular filtration rate (GFR) using multiple established formulas. It supports CKD-EPI, MDRD, Cockcroft-Gault, and the Schwartz formula for pediatric use.

**Highlights:** GFR calculation, CKD-EPI formula, MDRD formula, Cockcroft-Gault formula, Schwartz formula for children

**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 NefroCalc free?

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

### Is MedCalX free?

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

### Which has better reviews, NefroCalc or MedCalX?

NefroCalc is rated higher. NefroCalc averages 5.0 out of 5 from 1 ratings, while MedCalX averages 3.8 from 31 ratings.

### Do NefroCalc or MedCalX have ads?

Neither NefroCalc nor MedCalX shows ads.

### Which is updated more often, NefroCalc or MedCalX?

NefroCalc ships an update every 8 months, and MedCalX every 5 months. Most recently, NefroCalc was updated on October 23, 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.*