ASAS App vs GRAPPA App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ASAS App
This medical app provides essential tools for assessing Ankylosing Spondylitis. It includes calculators for key disease activity scores and offers comprehensive information on diagnosis, classification, and treatment of spondyloarthritis.
- ASDAS calculator
- BASDAI calculator
- Spondyloarthritis classification
- Diagnosis information
- Treatment guidelines
- ASAS Health Index
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The ASAS app offers calculators for the Ankylosing Spondylitis Disease Activity Score (ASDAS), the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), as well as information on classification, diagnosis, outcome assessment, and treatment of spondyloarthritis. ASAS Health Index
GRAPPA App
This medical application aids in the assessment of patients with psoriatic arthritis and psoriasis. It provides tools to calculate disease severity scores and includes patient-completed questionnaires in multiple languages. Access to GRAPPA resources is also available.
- Psoriatic arthritis and psoriasis assessment
- Disease severity calculators (MDA, PASI, BSA)
- Patient-completed questionnaires (PsAID, PEST, HAQ)
- Multilingual questionnaire support
- Access to GRAPPA resources
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This app from GRAPPA (Group for Research and Assessment of Psoriasis and Psoriatic Arthritis) is designed to support the assessment of patients with psoriatic arthritis and psoriasis. It allows users to calculate a patient’s MDA and assess skin disease (using either PASI or BSA) through specially designed calculators. The app also includes PsAID, PEST and HAQ questionnaires which can be completed directly by patients in a range of languages and a selection of slides from the GRAPPA resources. Visit http://www.grappanetwork.org/ to find out more about GRAPPA.
Screenshots
Verdict
The clearest difference is update cadence: GRAPPA App at every 3 months against ASAS App's every 20 months. GRAPPA App also leads on iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for ASAS App against 5.0 for GRAPPA App. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
ASAS App ships an update every 20 months, GRAPPA App every 3 months. The most recent releases landed on September 15, 2026 and July 19, 2026 respectively.
| Parameter | ASAS App | GRAPPA App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 20 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 64 MB |
| Age rating | 17+ | 17+ |
| Developer | Stichting Assessment of Spondyloarthritis international Society | Group for Research and Assessment of Psoriasis and Psoriatic Arthritis |
Customer experience
ASAS App
GRAPPA App
In-app purchases
ASAS App
No in-app purchases
GRAPPA App
No in-app purchases
