# API Testing Tool vs RegExpress

The clearest difference is review sentiment: API Testing Tool at 100% against RegExpress's 0%. API Testing Tool also leads on in-app purchases (none vs 4). RegExpress's advantage is price (Free vs $1.99) and device support (3 vs 1). On update cadence and ads there is nothing between them.

RegExpress is free to download; API Testing Tool costs $1.99 up front. RegExpress sells 4 one-off in-app purchases. API Testing Tool asks for nothing beyond the download.

API Testing Tool ships an update every 2 weeks, RegExpress every 3 weeks. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | API Testing Tool | RegExpress |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/api-testing-tool/id6739941752/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 8 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ANDREI EDUARD ISTRATE](https://appshunter.io/developer/1787555844) | [Nevv Atlantis LLC](https://appshunter.io/developer/1785977795) |

## What reviewers say

### API Testing Tool

[App page](https://appshunter.io/ios/app/api-testing-tool/id6739941752)

This tool allows developers and QA engineers to test and debug APIs directly from their mobile devices. It supports various HTTP request methods, provides detailed response previews, and offers organized storage for saved requests.

**Highlights:** Customizable HTTP requests (GET, POST, PUT), Detailed response preview, Organized storage for API requests, SQLite and iCloud integration, Debug APIs on device

**Features:** macOS Compatibility

**In-app purchases:** none


### RegExpress

[App page](https://appshunter.io/ios/app/regexpress/id6745237099)

This app is a comprehensive tool for building, testing, and debugging regular expressions. It offers real-time matching, syntax highlighting, and supports multiple regex flavors. Learn and practice with tutorials, puzzles, and challenges.

**Highlights:** Real-time regex matching, Support for 5 regex flavors, Step-by-step regex debugger, Pattern Library for saving patterns, Learning tutorials and daily puzzles, iCloud sync for Pro users, Universal app for iOS and Mac

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip $1 | $0.99 | one-time |
| Tip3 | $2.99 | one-time |
| RegExpress Pro | $4.99 | one-time |
| Tip5 | $4.99 | one-time |


## Frequently asked questions

### Is API Testing Tool free?

API Testing Tool costs $1.99, with no in-app purchases.

### Is RegExpress free?

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

### Do API Testing Tool or RegExpress have ads?

Neither API Testing Tool nor RegExpress shows ads.

### Which is updated more often, API Testing Tool or RegExpress?

API Testing Tool ships an update every 2 weeks, and RegExpress every 3 weeks. Most recently, API Testing Tool was updated on October 7, 2026 and RegExpress 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.*