# Calculate by QxMD vs SOFA ⊗

The clearest difference is ads: SOFA ⊗ at none against Calculate by QxMD's shown. SOFA ⊗ also leads on monetization model (free vs free with in-app purchases) and rating (5.0 vs 4.8). Calculate by QxMD's advantage is ratings volume (5.1K vs 1) and update cadence (every 6 weeks vs every 4 months). On price, 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.

SOFA ⊗ holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Calculate by QxMD has 5.1K ratings behind it against 1, so its average is the more settled of the two.

Calculate by QxMD ships an update every 6 weeks, SOFA ⊗ every 4 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Calculate by QxMD | SOFA ⊗ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5.1K ratings)](https://appshunter.io/ios/app/calculate-by-qxmd/id361811483/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sofa/id1317080900/reviews)** |
| Number of ratings | **5.1K** | 1 |
| Positive reviews | 86.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 118 MB | 9 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [WebMD](https://appshunter.io/developer/295076332) | [Md. Mamun-Ur-Rashid](https://appshunter.io/developer/700724354) |

## What reviewers say

### Calculate by QxMD

[App page](https://appshunter.io/ios/app/calculate-by-qxmd/id361811483)

This clinical calculator and decision support tool offers over 200 medical calculators and tools for diagnosis, treatment, and prognosis. It adapts to your practice and provides detailed references, integrating with PubMed and Read by QxMD.

**Highlights:** Over 200 medical calculators, Clinical decision support tools, Cardiology, internal medicine, and more, Knowledge translation from research, Question Flow technology, PubMed & Read integration, SI and Imperial units

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

**In-app purchases:** none

**What reviewers like**

- ⭐ Excellent app
- 📋 Comprehensive set of calculators
- 🔍 Helpful references and explanations
- 🔧 Useful for daily practice
- 🧠 Great for students and trainees

**What reviewers complain about**

- 🐛 App freezes or crashes
- 🔍 Some calculators not working
- 🔑 Repeated login requests
- 🔍 Outdated or missing features
- 🚫 Ads can be intrusive

**Reported bugs**

- App freezes when using multiple calculators
- Unable to add items to favorites list
- Unable to see calculation results after input
- App crashes on startup without internet connection
- Landscape mode not working on iPad

**Requested features**

- Dark mode option
- Ability to save/favorite frequently used calculators
- Integration with electronic health records
- Metric to imperial unit conversion
- More specialized calculators (e.g., opioid equivalence, pediatric BP)


### SOFA ⊗

[App page](https://appshunter.io/ios/app/sofa/id1317080900)

This medical app calculates the Sequential Organ Failure Assessment (SOFA) score. It assesses organ system performance and assigns a score to determine the risk of mortality for ICU patients. A higher SOFA score indicates a greater likelihood of mortality.

**Highlights:** SOFA score calculation, Organ system assessment, Mortality risk determination, ICU patient data analysis

**In-app purchases:** none


## Frequently asked questions

### Is Calculate by QxMD free?

Calculate by QxMD is free to download, with no in-app purchases.

### Is SOFA ⊗ free?

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

### Which has better reviews, Calculate by QxMD or SOFA ⊗?

SOFA ⊗ is rated higher. Calculate by QxMD averages 4.8 out of 5 from 5.1K ratings, while SOFA ⊗ averages 5.0 from 1 ratings.

### Do Calculate by QxMD or SOFA ⊗ have ads?

Calculate by QxMD shows ads; SOFA ⊗ does not.

### Which is updated more often, Calculate by QxMD or SOFA ⊗?

Calculate by QxMD ships an update every 6 weeks, and SOFA ⊗ every 4 months. Most recently, Calculate by QxMD was updated on November 6, 2026 and SOFA ⊗ on November 2, 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.*