# Developer Tools vs PaySim Merchant

The clearest difference is rating: PaySim Merchant at 5.0 against Developer Tools's 2.0. PaySim Merchant also leads on in-app purchases (none vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Developer Tools sells 1 one-off in-app purchase. PaySim Merchant asks for nothing beyond the download.

PaySim Merchant holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Developer Tools ships an update every 6 weeks, PaySim Merchant monthly. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Developer Tools | PaySim Merchant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/developer-tools-exabox/id1577374289/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/paysim-merchant/id1579105694/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free | Free |
| Size | 102 MB | 18 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alberto Malagoli](https://appshunter.io/developer/965971566) | [mSIGNIA](https://appshunter.io/developer/531752198) |

## What reviewers say

### Developer Tools

[App page](https://appshunter.io/ios/app/developer-tools-exabox/id1577374289)

This app consolidates over 30 essential developer utilities into a single, offline application. It provides tools for formatting, encoding, decoding, generating data, and testing code snippets without needing an internet connection. Enjoy a privacy-first approach with a one-time purchase and extensive customization options.

**Highlights:** Over 30 offline developer tools, JSON formatter and converter, Base64 encoder/decoder, Fake data generator, Regular expression evaluator, REST API client, Customizable themes and highlighting

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $4.99 | one-time |


### PaySim Merchant

[App page](https://appshunter.io/ios/app/paysim-merchant/id1579105694)

This platform simulates payment processes for testing compliance and interoperability. It supports various payment initiatives like EMV 3D-Secure, SCA, FIDO, and Web Authentication APIs.

**Highlights:** End-to-end payment simulation, Compliance and interoperability testing, EMV 3D-Secure 2.1 and 2.2 support, SCA and FIDO integration, Web Authentication and Payment Request API testing

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

**In-app purchases:** none


## Frequently asked questions

### Is Developer Tools free?

Developer Tools is free to download, with in-app purchases available.

### Is PaySim Merchant free?

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

### Which has better reviews, Developer Tools or PaySim Merchant?

PaySim Merchant is rated higher. Developer Tools averages 2.0 out of 5 from 1 ratings, while PaySim Merchant averages 5.0 from 1 ratings.

### Do Developer Tools or PaySim Merchant have ads?

Neither Developer Tools nor PaySim Merchant shows ads.

### Which is updated more often, Developer Tools or PaySim Merchant?

Developer Tools ships an update every 6 weeks, and PaySim Merchant monthly. Most recently, Developer Tools was updated on November 3, 2026 and PaySim Merchant on November 11, 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.*