# a8s Regex — Test your regex offline

> Test your regex offline (iPhone/iPad app by Antoine Jacono.)

- Source: https://appshunter.io/ios/app/a8s-regex/id6792500473 (this page in markdown: same URL + `.md`)
- Developer: [Antoine Jacono](https://appshunter.io/developer/6792331709)
- Category: Developer Tools, Utilities
- Price: $2.99
- Age rating: 4+
- Requires: iOS 17.0 · 10 MB
- Languages: American English, French (France), Italian, Japanese, Russian, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-07-20
- Data updated: 2026-09-17

## What is a8s Regex?

Create, test and refine regular expressions on Mac, iPhone, iPad and Apple Vision Pro. a8s Regex highlights matches in your text and helps you understand each result.

TEST AND EXPLORE
• Highlighted matches and detailed capture groups.
• Replacement previews using $1, $2 and subsequent groups.
• Examples for extracting email addresses, parsing logs and reformatting dates.
• Up to 50 positive or negative test cases, saved with your pattern.

KEEP YOUR WORK
Save patterns to history, mark favorites and return to your last session. Export results as JSON or CSV. History stays on each device, with no automatic synchronization.

A PRECISE ENGINE
The app uses NSRegularExpression, Foundation’s ICU engine. Its syntax may differ from JavaScript, PCRE or Python. Positions use UTF-16 units.

ON YOUR DEVICE
Local processing, with no account, advertising or tracking. One-time purchase, no subscription.

## Is a8s Regex safe?

Not enough ratings yet to assess a8s Regex.

## Is a8s Regex legit?

a8s Regex has limited verification signals. The AppsHunter Legitimacy Score for a8s Regex is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.3.3 — 2026-09-15

The interface is available in French, English, Japanese, Simplified and Traditional Chinese, Russian, Italian and Spanish. Large exports are bounded, saving while typing is improved, and matches remain available if replacement fails. Oversized sessions are preserved for recovery. Long option labels can wrap across lines.

### 1.3.2 — 2026-09-12

This update improves responsiveness and precision throughout the regex workspace.

• Main results appear without waiting for expensive test cases.
• Oversized replacements preserve your source text.
• Improved Unicode positions, character counts and capture highlighting in lookaheads.
• More reliable highlighting, selection and text pasting.
• Better preservation of older favorites when saving again.
• CSV exports protect values from being interpreted as formulas; JSON keeps exact values.

### 1.3.1 — 2026-09-11

This update improves evaluation, editing, and history reliability.

• Better memory limits for large captures and replacements.
• More responsive evaluation cancellation.
• Fixed test cases for text containing many matches.
• Match results remain visible for empty input.
• Improved technical text entry and Japanese/Chinese composition handling.
• Confirmation before resetting the current session.
• Favorites are preserved when recent history reaches its limit.

### 1.3 — 2026-09-09

Trois exemples prêts à lancer : adresses e-mail, journaux et dates.
Des cas de test positifs et négatifs, conservés avec vos expressions dans l’historique.
Interruption des évaluations coûteuses et annulation des calculs devenus inutiles.
Amélioration des traductions anglaises et des panneaux sur iPhone.

### 1.0 — 2026-07-22

No release notes.

## More apps by Antoine Jacono

- [Blinky Light](https://appshunter.io/ios/app/blinky-light/id6792331707)

All apps by Antoine Jacono: https://appshunter.io/developer/6792331709

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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 2026-09-17.*