Comparison

DAS Calculator vs RheumHub

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DAS Calculator

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
Read full description

DAS, or "Disease Activity Score," is a measure of the activity of rheumatoid arthritis. Based on the work of the Department of Rheumatology at the University Medical Centre at Nigmegen (Netherlands), a validated tool (formula) was developed to evaluate and track Rheumatoid Arthritis disease activity. By measuring the tender and swollen joint counts (TJC & SJC respectively), CRP (c-reactive protein) and General Health, the DAS 28-4 gives an estimate of disease activity, while the DAS 28-3 uses just the TJC, SJC & CRP. Clinicians, rheumatologists in training, educators and researchers use this tool everyday and now you can have it readily available on your Apple mobile device. The following formulas are free for you to try. • DAS28-CRP • DAS28-CRP (3 Variable) • DAS/DAS28 Converter You may use these forever and never be nagged. There are no ads. Enjoy! If you like what you see, upgrade to the "Pro" version via one-time in-app purchase. This will unlock all remaining formulas, including: • DAS28 • DAS28 (3 Variable) • DAS-CRP • DAS-CRP (3 Variable) • Original DAS • Original DAS (3 Variable) • CDAI • SDAI • Cumulative and Weighed RAPID3®

About

RheumHub

Features
Read full description

Scientific contributions The possibility of free registration for most workshops, courses and conferences within the State of Kuwait The possibility of obtaining discounts in registering and attending in-person or virtual international conferences Offers and discounts Special offers and discounts of available services and social events for registered doctors and their families. Volunteer work Available volunteering participation (conference, workshop, community awareness, etc.) Electronic voting Participating in voting on topics of interest to rheumatologists Health area Reminders before the dates of activities and events Rheumatology magazine Publishing an electronic rheumatology magazine Activities and events Publishing details of the association’s activities and events

Screenshots

DAS Calculator4 screens
RheumHub4 screens

Verdict

The call

The clearest difference is in-app purchases: RheumHub at none against DAS Calculator's 1. RheumHub also leads on update cadence (fortnightly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

DAS Calculator ships an update every 4 months, RheumHub fortnightly. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 8 level
DAS Calculator versus RheumHub: the parameters behind the verdict, then further details
ParameterDAS CalculatorRheumHub
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews55.6% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size1 MB75 MB
Age rating4+12+
DeveloperGreg FiumaraKuwait Association of Rheumatology (KAR)

In-app purchases

1 purchases

DAS Calculator

One-time1
  • Unlock All Calculators$1.99
None

RheumHub

No in-app purchases

Questions

Is DAS Calculator free?
DAS Calculator is free to download, with in-app purchases available.
Is RheumHub free?
RheumHub is free to download, with no in-app purchases.
Do DAS Calculator or RheumHub have ads?
Neither DAS Calculator nor RheumHub shows ads.
Which is updated more often, DAS Calculator or RheumHub?
DAS Calculator ships an update every 4 months, and RheumHub fortnightly. Most recently, DAS Calculator was updated on November 1, 2026 and RheumHub on October 26, 2026.

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