# DAS Calculator vs Rheumatologic Diseases

The clearest difference is rating: DAS Calculator at 5.0 against Rheumatologic Diseases's 1.0. Rheumatologic Diseases's advantage is in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 4 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. DAS Calculator sells 1 one-off in-app purchase. Rheumatologic Diseases asks for nothing beyond the download.

DAS Calculator holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

DAS Calculator ships an update every 4 months, Rheumatologic Diseases every 5 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | DAS Calculator | Rheumatologic Diseases |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/das-calculator/id354092306/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/rheumatologic-diseases/id1251067402/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 19 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Greg Fiumara](https://appshunter.io/developer/354092309) | [@Point of Care](https://appshunter.io/developer/916313675) |

## What reviewers say

### DAS Calculator

[App page](https://appshunter.io/ios/app/das-calculator/id354092306)

This medical tool helps evaluate and track rheumatoid arthritis disease activity using validated formulas. It calculates scores based on joint counts, CRP, and general health, providing an estimate of disease progression for clinicians and researchers.

**Highlights:** Rheumatoid arthritis disease activity scoring, Track disease activity over time, Validated formulas for DAS28-CRP, Includes DAS/DAS28 converter, Unlock additional formulas with Pro version

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Calculators | $1.99 | one-time |


### Rheumatologic Diseases

[App page](https://appshunter.io/ios/app/rheumatologic-diseases/id1251067402)

This clinical decision support tool helps rheumatologists access evidence-based medical content and manage patient data. It features voice-activated search, case studies, and patient education resources to improve care at the point of need.

**Highlights:** Evidence-based medical content, Voice-activated search with Watson, Patient data tracking, Case studies and videos, Continuing medical education credit, Patient education resources

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

**In-app purchases:** none


## Frequently asked questions

### Is DAS Calculator free?

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

### Is Rheumatologic Diseases free?

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

### Which has better reviews, DAS Calculator or Rheumatologic Diseases?

DAS Calculator is rated higher. DAS Calculator averages 5.0 out of 5 from 1 ratings, while Rheumatologic Diseases averages 1.0 from 1 ratings.

### Do DAS Calculator or Rheumatologic Diseases have ads?

Neither DAS Calculator nor Rheumatologic Diseases shows ads.

### Which is updated more often, DAS Calculator or Rheumatologic Diseases?

DAS Calculator ships an update every 4 months, and Rheumatologic Diseases every 5 weeks. Most recently, DAS Calculator was updated on November 1, 2026 and Rheumatologic Diseases 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.*