# RegEx+ vs 0Day

The clearest difference is review sentiment: 0Day at 100% against RegEx+'s 50%. 0Day also leads on price (Free vs $1.99) and rating (5.0 vs 4.2). RegEx+'s advantage is in-app purchases (none vs 2) and chart position (#102 vs unranked). On ratings volume and ads there is nothing between them.

0Day is free to download; RegEx+ costs $1.99 up front. 0Day sells 2 in-app purchases, starting at $3.99 per month. RegEx+ asks for nothing beyond the download.

0Day holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 50% of RegEx+'s written reviews are positive against 100% of 0Day's.

RegEx+ ships an update every 4 weeks, 0Day every 5 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RegEx+ | 0Day |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/regex-plus/id1511763524/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/0day-cve-and-exploit-alerts/id6761655372/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 5 days** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#102** | — |
| Size | 5 MB | 10 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [圣罡 汤](https://appshunter.io/developer/951344278) | [Richard Lous](https://appshunter.io/developer/1890695617) |

## What reviewers say

### RegEx+

[App page](https://appshunter.io/ios/app/regex-plus/id1511763524)

**Currently charting:** #102 Top Paid · Developer Tools (US App Store)

This tool helps developers master regular expressions on macOS and iOS. It offers a comprehensive cheatsheet and cloud synchronization across devices to decode and construct complex text patterns.

**Highlights:** Master regular expressions, Comprehensive cheatsheet, Cloud synchronization, Cross-device support (macOS, iOS), Decode complex patterns

**Features:** Vision Pro support

**In-app purchases:** none


### 0Day

[App page](https://appshunter.io/ios/app/0day-cve-and-exploit-alerts/id6761655372)

Receive immediate alerts for zero-day vulnerabilities, supply chain attacks, and compromised packages relevant to your specific technology stack. Get early warnings before they hit the news cycle, enabling proactive security measures.

**Highlights:** Zero-day vulnerability alerts, Supply chain attack notifications, Compromised package warnings, Stack-aware filtering, Early warning system, Push notifications, Full alert archive

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 0Day Pro | $3.99 | per month |
| 0Day Pro | $29.99 | per year |


## Frequently asked questions

### Is RegEx+ free?

RegEx+ costs $1.99, with no in-app purchases.

### Is 0Day free?

0Day is free to download, with in-app purchases available.

### Which has better reviews, RegEx+ or 0Day?

0Day is rated higher. RegEx+ averages 4.2 out of 5 from 5 ratings, while 0Day averages 5.0 from 2 ratings.

### Do RegEx+ or 0Day have ads?

Neither RegEx+ nor 0Day shows ads.

### Which is updated more often, RegEx+ or 0Day?

RegEx+ ships an update every 4 weeks, and 0Day every 5 days. Most recently, RegEx+ was updated on October 29, 2026 and 0Day on October 31, 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.*