# Design Materials vs OptiListen

The clearest difference is rating: OptiListen at 5.0 against Design Materials's 4.5. OptiListen also leads on in-app purchases (none vs 3) and iOS requirement (11.0 vs 18.6). Design Materials's advantage is update cadence (every 3 months vs every 6 months). On price, ratings volume, ads and device support there is nothing between them.

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

OptiListen holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Design Materials ships an update every 3 months, OptiListen every 6 months. The most recent releases landed on October 18, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Design Materials | OptiListen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/design-materials/id975764691/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/optilisten/id1593948410/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 28 MB | 19 MB |
| Requires iOS | 18.6 | **11.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chrystian Enriquez](https://appshunter.io/developer/428286625) | [Christian Crumlish](https://appshunter.io/developer/1593948412) |

## 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 |


### OptiListen

[App page](https://appshunter.io/ios/app/optilisten/id1593948410)

Enhance your listening abilities with this straightforward application. Track your progress during audio or video calls and build your skills over time. It's designed for anyone looking to improve their active listening.

**Highlights:** Set listening goals, Track session results, Build listening skills, Use with audio/video calls, Local data storage

**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 OptiListen free?

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

### Which has better reviews, Design Materials or OptiListen?

OptiListen is rated higher. Design Materials averages 4.5 out of 5 from 2 ratings, while OptiListen averages 5.0 from 3 ratings.

### Do Design Materials or OptiListen have ads?

Neither Design Materials nor OptiListen shows ads.

### Which is updated more often, Design Materials or OptiListen?

Design Materials ships an update every 3 months, and OptiListen every 6 months. Most recently, Design Materials was updated on October 18, 2026 and OptiListen on October 21, 2026.

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