# TrichoLAB snApp vs GRAPPA App

The clearest difference is in-app purchases: GRAPPA App at none against TrichoLAB snApp's 1. GRAPPA App also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). TrichoLAB snApp's advantage is update cadence (every 6 weeks vs every 3 months). On price and ads there is nothing between them.

Both are free to download. TrichoLAB snApp sells 1 one-off in-app purchase. GRAPPA App asks for nothing beyond the download.

TrichoLAB snApp ships an update every 6 weeks, GRAPPA App every 3 months. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | TrichoLAB snApp | GRAPPA App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/grappa-app/id1346646781/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | — | Free |
| Size | 105 MB | 64 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [TrichoLAB sp. z o.o.](https://appshunter.io/developer/1231392275) | [Group for Research and Assessment of Psoriasis and Psoriatic Arthritis](https://appshunter.io/developer/1346646780) |

## What reviewers say

### TrichoLAB snApp

[App page](https://appshunter.io/ios/app/tricholab-snapp/id1231392276)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Credit | $44.99 | one-time |


### GRAPPA App

[App page](https://appshunter.io/ios/app/grappa-app/id1346646781)

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.

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

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

**In-app purchases:** none


## Frequently asked questions

### Is TrichoLAB snApp free?

TrichoLAB snApp is free to download, with in-app purchases available.

### Is GRAPPA App free?

GRAPPA App is free to download, with no in-app purchases.

### Do TrichoLAB snApp or GRAPPA App have ads?

Neither TrichoLAB snApp nor GRAPPA App shows ads.

### Which is updated more often, TrichoLAB snApp or GRAPPA App?

TrichoLAB snApp ships an update every 6 weeks, and GRAPPA App every 3 months. Most recently, TrichoLAB snApp was updated on October 29, 2026 and GRAPPA App on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*