# Design Materials vs GSS Quality Audit

The clearest difference is in-app purchases: GSS Quality Audit at none against Design Materials's 3. GSS Quality Audit also leads on iOS requirement (12.0 vs 18.6). Design Materials's advantage is update cadence (every 3 months vs every 5 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Design Materials sells 3 in-app purchases, starting at $7.99 per month. GSS Quality Audit asks for nothing beyond the download.

Design Materials ships an update every 3 months, GSS Quality Audit every 5 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Design Materials | GSS Quality Audit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/design-materials/id975764691/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 30.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 24 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | **iPhone, iPad, Mac** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chrystian Enriquez](https://appshunter.io/developer/428286625) | [Ciena](https://appshunter.io/developer/646843125) |

## What reviewers say

### Design Materials

[App page](https://appshunter.io/ios/app/design-materials/id975764691)

This app serves as an offline reference guide for various design materials, including polymers and metals. It allows users to manage their own material data, view 3D models, and capture objects with their device's camera. Ideal for professionals and hobbyists involved in product design and 3D printing.

**Highlights:** Offline material reference guide, Custom material and resin management, 3D model viewer and import/export, Object capture via device camera, Favorites and notes section, Cross-device compatibility (iOS, macOS)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bronze member | $7.99 | per month |
| Silver member | $17.99 | per 3 months |
| Gold member | $49.99 | per year |


### GSS Quality Audit

[App page](https://appshunter.io/ios/app/gss-quality-audit/id1063744314)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Design Materials free?

Design Materials is free to download, with in-app purchases available.

### Is GSS Quality Audit free?

GSS Quality Audit is free to download, with no in-app purchases.

### Do Design Materials or GSS Quality Audit have ads?

Neither Design Materials nor GSS Quality Audit shows ads.

### Which is updated more often, Design Materials or GSS Quality Audit?

Design Materials ships an update every 3 months, and GSS Quality Audit every 5 months. Most recently, Design Materials was updated on November 1, 2026 and GSS Quality Audit on November 7, 2026.

---

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