GRAPPA App vs PDPA Conference
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
PDPA Conference
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Join us in Philadelphia, Pennsylvania for the fourth annual Keystone Dermatology CME Conference at the Westin Philadelphia. PDPA is proud to host the largest regional conference in the mid-Atlantic for Dermatology PAs. PDPA expects 125 Dermatology PAs from Pennsylvania and the surrounding area.
Screenshots
Verdict
The clearest difference is update cadence: PDPA Conference at every 4 days against GRAPPA App's every 3 months. On price, ads, in-app purchases and device support 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.
GRAPPA App ships an update every 3 months, PDPA Conference every 4 days. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | GRAPPA App | PDPA Conference |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 64 MB | 84 MB |
| Age rating | 17+ | 17+ |
| Developer | Group for Research and Assessment of Psoriasis and Psoriatic Arthritis | THANIGAIVELAN MUTHU |
In-app purchases
GRAPPA App
No in-app purchases
PDPA Conference
No in-app purchases
Questions
Is GRAPPA App free?
Is PDPA Conference free?
Do GRAPPA App or PDPA Conference have ads?
Which is updated more often, GRAPPA App or PDPA Conference?
Other comparisons
