# RegEspresso

> Simple mobile tool for testing and highlighting regular expression matches. (iPhone/iPad app by Yichen Cao.)

- Source: https://appshunter.io/ios/app/regespresso/id903640131 (this page in markdown: same URL + `.md`)
- Developer: [Yichen Cao](https://appshunter.io/developer/1470874785)
- Category: Productivity, Utilities
- Price: Free
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 8.0 · 1 MB
- Languages: American English
- Released: 2014-08-05
- Data updated: 2026-06-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/regespresso/id903640131/reviews.md

## What is RegEspresso?

Simple regular expression tester.

Enter your regular expression filter and enter your source text. Highlights matches on the fly.

## Key features

- Real-time regex matching
- On-the-fly highlighting
- Input regex filter
- Input source text


## Frequently asked questions about RegEspresso

### What is RegEspresso?

RegEspresso is a mobile application designed for testing regular expressions. It allows users to input a regex pattern and source text, then highlights any matches directly on the screen.

### Is RegEspresso free to use?

Yes, RegEspresso is available for free. There are no costs associated with downloading or using its core features for testing regular expressions.

### What devices does RegEspresso support?

RegEspresso is compatible with iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS operating system.

### How often is RegEspresso updated?

The latest version of RegEspresso is 1.1, which was released on March 19, 2015. The app was initially released on August 5, 2014.

### What is the age rating for RegEspresso?

RegEspresso has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### Does RegEspresso have ads?

No, RegEspresso does not contain advertisements. As a free application, it provides an ad-free experience for its users.

### Can RegEspresso be used offline?

The description does not specify offline functionality. However, as a tool for testing regex patterns with input text, it is likely designed to function without an internet connection.

## Version history (last 2 releases)

### 1.1 — 2015-03-19

This app has been updated by Apple to display the Apple Watch app icon.

Icon update, support for iPhone 6.
Better source text field.
Also a centered coffee cup :-)

### 1.0 — 2014-08-04

No release notes.

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## More apps by Yichen Cao

- [Colorxy](https://appshunter.io/ios/app/colorxy/id854408757)
- [pixel - color picker+keyboard](https://appshunter.io/ios/app/pixel-color-picker-plus-keyboard/id936267373)
- [– Counting +](https://appshunter.io/ios/app/counting-plus/id984747827)
- [Taptronome](https://appshunter.io/ios/app/taptronome/id1004974395)

All apps by Yichen Cao: https://appshunter.io/developer/1470874785

## Related topics

[yichen cao](https://appshunter.io/ios/topics/yichen-cao)

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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 2026-06-24.*