RegEx Knife vs LudyActions
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RegEx Knife
This tool simplifies working with regular expressions by allowing users to highlight and edit capture groups, immediately viewing the results. It also facilitates experimentation with regex substitutions, offering a straightforward approach to complex pattern matching.
- Highlight capture groups
- Edit capture groups
- See immediate results
- Experiment with substitutions
- Works on iPhone and iPad
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RegEx Knife is an easy and useful tool for working with Regular Expressions. RegEx Knife is unique in how it allows you to highlight capture groups within a Regular Expression, edit them and immediately see the results. RegEx Knife also makes it easy to experiment with regular expression substitutions. Version 2 retains the simplicity of the original RegEx Knife, with the added advantage that it works on your iPhone as well as your iPad.
LudyActions
Enhance your iPhone and iPad automation with over 200 powerful actions for Apple Shortcuts. This free app offers extensive tools for text, math, date, media, and more, all processed on-device for privacy.
- 226+ powerful actions for Apple Shortcuts
- Text processing and manipulation
- Math and number operations
- Advanced date and time formatting
- JSON parsing and manipulation
- Extensive media tools (image, PDF, video)
- Persistent storage and iCloud sync
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LudyActions supercharges Apple Shortcuts with 226 powerful actions to automate anything on your iPhone and iPad. And it's completely FREE! ** NEW IN v1.3: Media Power Update - 25 new media actions! ** COMPLETELY FREE - All 226 actions included at no cost - No subscription required - ever - No in-app purchases needed - Privacy-first: all processing on-device BROWSE ALL ACTIONS - New Actions tab with complete catalog - Search and filter by category - Detailed descriptions and examples - Copy action names to find in Shortcuts TEXT PROCESSING (45 actions) - Case conversion: uppercase, lowercase, title case - Trim, split, join, replace text - Count words, characters, lines - Extract emails, URLs, numbers - Base64 and URL encoding/decoding - MD5, SHA256 hash generation MATH AND NUMBERS (33 actions) - Arithmetic and rounding - Min, max, average, sum - Random number generation - Trigonometry functions - Number formatting DATE AND TIME (31 actions) - Format dates with custom patterns - Add/subtract days, months, years - Calculate days between dates - Get date components - Relative time formatting JSON PROCESSING (14 actions) - Parse and validate JSON - Get values by key path - Create and modify structures LIST OPERATIONS (15 actions) - Sort, reverse, shuffle - Get first/last/random item - Filter and find items MEDIA TOOLS (54 actions) - Image resize, crop, rotate, flip, overlay - Image filters, watermark, format conversion - PDF text extraction, merge, split, page count - Video trimming, thumbnails, metadata - Audio metadata extraction - OCR text recognition PERSISTENT STORAGE (7 actions) - Store values across shortcut runs - iCloud sync across devices - Perfect for counters and preferences HTTP AND NETWORKING (6 actions) - GET, POST, PUT, DELETE requests - URL building and encoding CLOUDKIT SYNC (7 actions) - Save/fetch data to iCloud - Query cloud records NOTION INTEGRATION (5 actions) - Search and update pages - Add database rows Download LudyActions and unlock the full potential of Apple Shortcuts - completely FREE! Privacy Policy: https://ludy.app/privacy
Screenshots
Verdict
RegEx Knife and LudyActions both sit at 4.3 stars, but that hides the real split: 100% of LudyActions's written reviews are positive against 62% of RegEx Knife's. LudyActions also leads on monetization model (free vs paid) and update cadence (every 9 days vs every 3 months). RegEx Knife's advantage is ratings volume (25 vs 5) and iOS requirement (8.0 vs 17.0). On price, rating, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.3 for RegEx Knife against 4.2 for LudyActions. That said, the two scores are not equally well evidenced: RegEx Knife has 25 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 62% of RegEx Knife's written reviews are positive against 100% of LudyActions's.
RegEx Knife ships an update every 3 months, LudyActions every 9 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | RegEx Knife | LudyActions |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (25 ratings) — better | 4.2 (5 ratings) |
| Positive reviews | 61.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 25 — better | 5 |
| Update frequency | Every 3 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Mark Alldritt | Ludy Ankas, LLC |
Customer experience
RegEx Knife
LudyActions
In-app purchases
RegEx Knife
No in-app purchases
LudyActions
No in-app purchases
