# GRAPPA App

> Medical app for assessing psoriatic arthritis and psoriasis severity. (iPhone/iPad app by Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.)

- Source: https://appshunter.io/ios/app/grappa-app/id1346646781 (this page in markdown: same URL + `.md`)
- Developer: [Group for Research and Assessment of Psoriasis and Psoriatic Arthritis](https://appshunter.io/developer/1346646780)
- Category: Medical
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 17+
- Requires: iOS 13.0 · 64 MB
- Languages: American English
- Released: 2018-02-12
- Data updated: 2026-07-19
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/grappa-app/id1346646781/reviews.md

## What is GRAPPA App?

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.

## Key features

- Psoriatic arthritis and psoriasis assessment
- Disease severity calculators (MDA, PASI, BSA)
- Patient-completed questionnaires (PsAID, PEST, HAQ)
- Multilingual questionnaire support
- Access to GRAPPA resources


## Frequently asked questions about GRAPPA App

### What is GRAPPA App used for?

GRAPPA App is designed to support the assessment of patients with psoriatic arthritis and psoriasis. It helps calculate disease severity scores and includes patient questionnaires.

### What types of assessments can GRAPPA App perform?

GRAPPA App allows users to calculate a patient’s MDA (Minimal Disease Activity) and assess skin disease using PASI (Psoriasis Area and Severity Index) or BSA (Body Surface Area).

### Can patients complete questionnaires using GRAPPA App?

Yes, GRAPPA App includes questionnaires like PsAID, PEST, and HAQ that can be completed directly by patients in a range of languages.

### Is GRAPPA App available on multiple devices?

GRAPPA App is supported on iPhone, iPad, and iPod devices.

### What is the age rating for GRAPPA App?

GRAPPA App has an age rating of 17+.

### When was GRAPPA App last updated?

GRAPPA App was last updated on February 11, 2022, with version 1.5.

### Does GRAPPA App have ads?

No, GRAPPA App does not contain advertisements.

### Where can I find more information about GRAPPA?

You can find more information about GRAPPA by visiting their website at http://www.grappanetwork.org/.

## Version history (last 5 releases)

### 2.0.6 — 2026-07-01

Changed app name "Grappa App" to "GRAPPA App"

### 2.0.4 — 2026-06-11

UI changes 
GRAPPA, psoriatic arthritis, psoriasis, MDA, PASI, PsAID, PEST, DUET calculator

### 2.0 — 2026-06-10

UI changes 
GRAPPA, psoriatic arthritis, psoriasis, MDA, PASI, PsAID, PEST, DUET calculator

### 1.5 — 2022-02-11

Amended PSAID question order.

### 1.4 — 2022-01-04

Updated PSAID 9 and 12 algorithms.

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## Related topics

[psoriatic arthritis](https://appshunter.io/ios/topics/psoriatic-arthritis)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-19.*