# RegExpress — Powerful Regex Testing Tool

> Regex testing and learning tool with real-time matching and multi-flavor support. (iPhone/iPad app by Nevv Atlantis LLC.)

- Source: https://appshunter.io/ios/app/regexpress/id6745237099 (this page in markdown: same URL + `.md`)
- Developer: [Nevv Atlantis LLC](https://appshunter.io/developer/1785977795)
- Category: Developer Tools, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 8 MB
- Languages: American English, Chinese (Simplified, China), European Spanish, Brazilian Portuguese
- Released: 2025-05-01
- Data updated: 2026-08-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/regexpress/id6745237099/reviews.md

## What is RegExpress?

RegExpress is a complete regular expression toolkit for iPhone, iPad, and Mac. Create, test, understand, and refine regex patterns in one focused workspace, whether you are learning the basics or maintaining production expressions.

Test with the flavor you actually use. RegExpress supports Swift Regex, Foundation (ICU), JavaScript/ECMAScript, Python Compatibility Mode, and native PCRE2. Flavor-aware options, syntax references, examples, diagrams, comparisons, and compatibility details help you spot differences before they become bugs.

Write and test with confidence

See live matches and capture groups as you type. Switch between automatic and manual execution, inspect clear errors, and keep the editor responsive during demanding patterns. Built-in safety analysis identifies potential backtracking risks, while find and replace lets you preview changes before applying them.

Focus on complex patterns

Open the multiline Focus Editor for more room, syntax-aware tools, a persistent token dock, flavor-specific options, visual railroad diagrams, code snippets, and quick access to the Pattern Builder, test suites, and reference material.

Understand and improve every expression

Turn plain-language requirements and examples into a regex. Explore explanations, recommendations, optimization suggestions, debugging tools, diagrams, and a searchable cheat sheet. Compare patterns by matches, compatibility, and performance to choose the right approach.

Build a reusable regex workflow

Save patterns, organize them into folders and automatic collections, keep history, and create test suites with positive and negative cases. Save complete .regexpress workspaces, reopen .regproj test projects, import shared content, and generate code for your project. A command palette, Spotlight integration, App Shortcuts, multiwindow support, and sharing tools keep common actions close at hand.

Learn by doing

Browse flavor-aware examples, follow guided tutorials, use the syntax reference, and practice with challenges designed for different skill levels.

A useful free experience

Core editing, unlimited live matching, all five engines, standard options, capture results, find and replace, examples, reference material, and Swift code generation are free. You can also save up to 20 patterns, keep 50 recent history items, create one test suite with up to 10 manual cases, and use selected previews of advanced tools.

RegExpress Pro is available as a one-time purchase with no subscription. Pro unlocks deeper debugging and performance analysis, complete visual tools, advanced generation and optimization, additional code targets, unlimited tests and saved content, iCloud sync, advanced organization, and more.

Whether you need a quick match, a visual explanation, or a repeatable testing workflow, RegExpress helps you build regex with clarity and confidence.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Chart rankings

- #200 in Top Grossing · Developer Tools (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/regexpress/id6745237099/reviews.md

### 1/5 — The tutorial itself is unfinished and baffling

*2025-10-18*

The app looks like it has really cool features but the text of the menus and reference material uses layouts that actually look incomplete or broken, making me doubt the reliability of every thing else, unfortunately.

**Developer response:** Thank you for the feedback. I am sorry for the issues you experienced with the tutorial and layout. I am actively updating the tutorial and improving the interface so everything displays clearly and works as expected. Your comments help guide these fixes and they will be included in the next updates. If you have any specific examples or suggestions, please feel free to share them using the in app support link.

## Frequently asked questions about RegExpress

### What regex flavors does RegExpress support?

RegExpress supports five popular regex flavors: Swift, NSRegularExpression, JavaScript, Python, and PCRE2, offering broad compatibility for various development needs.

### Can I save and organize my regex patterns with RegExpress?

Yes, RegExpress features a Pattern Library where you can save, organize, and even share your regex patterns, streamlining your workflow.

### Does RegExpress offer learning resources for beginners?

Absolutely. RegExpress includes comprehensive learning tutorials and daily puzzles, including Regex Golf challenges, to help users of all levels master regular expressions.

### Is RegExpress available on multiple Apple devices?

Yes, RegExpress is a universal app designed for iPhone, iPad, and Mac, ensuring a consistent experience across your Apple ecosystem.

### Does RegExpress have ads?

No, RegExpress does not contain advertisements, providing an uninterrupted user experience for testing and learning.

### What are the benefits of the Pro version of RegExpress?

The Pro version of RegExpress offers iCloud sync, allowing you to seamlessly synchronize your patterns and settings across all your devices.

### How often is RegExpress updated?

RegExpress was last updated on April 4, 2026, with version 6.13, indicating regular maintenance and feature enhancements.

### What is the age rating for RegExpress?

RegExpress has an age rating of 4+, making it suitable for a wide range of users, including younger learners and professionals.

## Version history (last 5 releases)

### 8 — 2026-08-01

Version 8 is a major upgrade built around safer execution, flavor accuracy, and a faster professional workflow.

Meet the new Focus Editor, a multiline workspace with a persistent token dock, flavor-aware options, railroad diagrams, code snippets, and direct access to building and testing tools.

Run expressions with five distinct engines: Swift Regex, Foundation (ICU), JavaScript/ECMAScript, Python Compatibility Mode, and native PCRE2. Options, examples, the cheat sheet, Pattern Builder, optimizer, comparisons, and diagrams now adapt to the selected flavor.

Execution is more responsive and reliable, with automatic or manual runs, cancellation, clearer errors, match limits, and improved protection from expensive backtracking.

Save complete .regexpress workspaces, reopen .regproj test projects, and keep patterns, options, text, replacements, tests, notes, and metadata together. Structured local storage and sync improvements make saved work more dependable.

Test suites now include richer results, edge-case intelligence, performance limits, progress, cancellation, and pattern health details. Pattern comparison now includes flavor-aware match, compatibility, and performance differences.

Generate Regex has been redesigned around plain-language requirements, positive and negative examples, strictness, portability, expected captures, previews, and refinement. Recommendations, optimization, examples, and automatic library collections have also been improved.

New productivity features include the command palette, Spotlight search, App Shortcuts, Share Extension support, deep links, incremental replacement previews, and improved workspace sharing.

Version 8 also introduces a clearer free tier. Core regex creation and testing remain free, with useful allowances for saved patterns, history, test cases, Generate Regex, and previews of advanced tools. RegExpress Pro remains a one-time purchase with no subscription.

This release also includes redesigned Examples, keyboard and scrolling fixes, accessibility improvements, localization updates, and many reliability refinements throughout the app.

### 7 — 2026-05-30

Version 7 focuses on making RegExpress more generous, more visual, and faster to use.

The free tier now lets you save up to 20 patterns, keep 50 history items, use folders and search, and start with 3 tutorial modules.

RegExpress Pro now has a lower one-time price of $4.99. Several Pro tools can also be tried before upgrading, including the visual debugger, pattern optimizer, pattern constructor, visual diagrams, pattern recommendations, pattern comparison, test suites, and code generation.

New visual regex diagrams turn patterns into zoomable railroad-style diagrams, with warnings and token details to help you understand complex expressions.

Quick Actions are now configurable. Choose which shortcuts appear in the main toolbar, including Library, Tools, Reference, Options, Keyboard, Playground, AI Assistant, Optimize, Debug, Builder, Test Suite, Save, History, Compare, Settings, Clear, and Code.

Workspace test suite generation can create test cases from the current editor, connect them to a pattern, and open the generated suite for regression testing.

Theme support has been expanded with a dedicated theme picker and app-wide color updates, plus refreshed light, dark, and tinted app icons.

Simplified Chinese has been added alongside English, Spanish, and Brazilian Portuguese.

Help tips, sheet headers, results filtering, search and replace, reference screens, pattern comparison, optimization, and tutorial/reference areas have been refreshed for clearer guidance and more consistent controls.

This update also includes reliability fixes for drafts, iCloud sync, pattern history, imports, export formatting, accessibility identifiers, UI tests, performance tools, and several regex engines.

### 6.13 — 2026-04-04

- Price change

### 6.12 — 2026-02-18

- Bug fixes

### 6.11 — 2025-12-19

Introducing RegExpress Pro

We've added a Pro upgrade to support ongoing development while keeping core regex testing free forever.

Free Features:
• Full regex pattern testing with real-time matching
• Save up to 7 patterns
• 5 Regex Golf challenges to test your skills
• 45-second debug visualizer preview
• Syntax highlighting and cheat sheet

Pro Upgrade ($3.99 - one-time purchase):
• Unlimited pattern saves with iCloud sync
• Visual step-by-step debugging
• Code generation for Swift, JavaScript, Python & more
• Test suite with regression testing
• All learning paths and Regex Golf challenges
• Full pattern explanations and performance metrics

No subscription required - unlock Pro once and it's yours forever.

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All apps by Nevv Atlantis LLC: https://appshunter.io/developer/1785977795

## Related topics

[regular expressions basics](https://appshunter.io/ios/topics/regular-expressions-basics)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-04.*