# MATTR GO Hold vs Developer Laboratory

The clearest difference is price: MATTR GO Hold at Free against Developer Laboratory's $0.99. MATTR GO Hold also leads on review sentiment (100% vs 60%) and in-app purchases (none vs 8). Developer Laboratory's advantage is update cadence (monthly vs every 2 months) and iOS requirement (12.0 vs 15.6). On ads, monetization model and device support there is nothing between them.

MATTR GO Hold is free to download; Developer Laboratory costs $0.99 up front. Developer Laboratory sells 8 one-off in-app purchases. MATTR GO Hold asks for nothing beyond the download.

MATTR GO Hold ships an update every 2 months, Developer Laboratory monthly. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | MATTR GO Hold | Developer Laboratory |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.7 (6 ratings)](https://appshunter.io/ios/app/developer-laboratory/id1568656582/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | **100.0% of reviews** | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 57 MB | 9 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MATTR Limited](https://appshunter.io/developer/1487949165) | [恒盛 程](https://appshunter.io/developer/1533201832) |

## What reviewers say

### MATTR GO Hold

[App page](https://appshunter.io/ios/app/mattr-go-hold/id1518660243)

Securely collect, store, and present verifiable digital credentials. This tool allows for selective information sharing and supports multiple credential formats and protocols for trusted interactions.

**Highlights:** Credential collection and presentation, Biometric authentication, Selective information disclosure, Supports multiple credential formats, Multi-protocol support, Activity log

**Features:** Vision Pro support

**In-app purchases:** none


### Developer Laboratory

[App page](https://appshunter.io/ios/app/developer-laboratory/id1568656582)

This app provides a collection of example code and UI components for iOS developers. It demonstrates various functionalities like app icon creation, image viewing, web page loading, and custom controls. Access the source code to learn implementation details.

**Highlights:** APP icon creation, Imitation of WeChat Moments, Web page loading, Custom UI components, QR code scanning, Facial tracking, Database operations

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 0 ice cola | $0.99 | one-time |
| 1 ice cola | $0.99 | one-time |
| A sip of iced cola | $0.99 | one-time |
| 一元商品 | $0.99 | one-time |
| 2 ice cola | $1.99 | one-time |
| 3 ice cola | $2.99 | one-time |
| 4.16 ice cola | $3.99 | one-time |
| 16.5 ice cola | $14.99 | one-time |


## Frequently asked questions

### Is MATTR GO Hold free?

MATTR GO Hold is free to download, with no in-app purchases.

### Is Developer Laboratory free?

Developer Laboratory costs $0.99, and also offers in-app purchases.

### Do MATTR GO Hold or Developer Laboratory have ads?

Neither MATTR GO Hold nor Developer Laboratory shows ads.

### Which is updated more often, MATTR GO Hold or Developer Laboratory?

MATTR GO Hold ships an update every 2 months, and Developer Laboratory monthly. Most recently, MATTR GO Hold was updated on September 29, 2026 and Developer Laboratory on October 14, 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.*