Regexcellent: Learn Regex

Lessons, playground & golf

Free · In‑App Purchases

Learn regular expressions by writing them. Regexcellent combines a guided course, a live regex playground, and short challenges in a native app that works offline. LEARN AT YOUR OWN PACE Work through 40 interactive lessons in 8 modules, from literal matches and character classes to groups, backreferences, lookarounds, and practical recipes. Type patterns against sample text, see the matches, and use progressive hints when you need a hand. EXPERIMENT IN THE PLAYGROUND Test patterns with live match highlighting and capture details. Explore token-by-token explanations, toggle matching flags, and save useful patterns on your device. Export supported patterns as Swift, Kotlin, JavaScript, or Python snippets, with warnings when regex engines differ or a translation is unsupported. PRACTICE WITH REGEX GOLF Try 24 challenges and a daily rotating puzzle. Find a working solution, then make it shorter to improve your score. KEEP A REFERENCE CLOSE Search common regex tokens and open working examples in the Playground. BUILD A PRACTICE HABIT Track completed lessons, module badges, and your practice streak. Enable an optional local reminder when it suits you. MAKE IT YOURS Choose System, Light or Dark appearance. Swipe through onboarding with navigation controls always within reach, and see your module badges in a clear three-column layout. OPTIONAL ICLOUD SYNC Keep learning progress and saved patterns in sync across your iPhone, iPad and Mac using the same Apple Account. Sync is off until you enable it and confirm what will be copied to iCloud. FREE TO LEARN Every lesson and feature is free. The course, reference, challenges and regex engine work offline without an account. There are no ads, subscriptions or paid feature unlocks. Optional one-time App Store tips support development and unlock nothing. Sync and tips require internet and the corresponding Apple account. Built with SwiftUI for iPhone and iPad, with layouts that adapt to your screen. Regexcellent is for students, developers, and anyone who wants to understand the patterns they use. Start with your first match or use the Playground to explore a pattern of your own.

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Regexcellent 2.0 makes every screen easier to scan. Match and Replace sit in the Playground toolbar, with engine, mode and flags in one row; on iPad, Mac and Apple Vision Pro, results open in tabs. Filter the reference by category or favorites, one token per row. A Today row puts your review and the daily challenge first. Lessons open with a short concept. Mac windows remember their size and full-screen state. Every feature remains free.

Version 2.0.0

The developer, MIHAIL PLAMENOV DUCHEV, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    MIHAIL PLAMENOV DUCHEV
    Size
    4.4 MB
    Category
    Education
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
    Languages
    English and Bulgarian
    Age Rating
    4+
    In-App Purchases
    Yes
    • Large tip $3.99
    • Medium tip $2.99
    • Small tip $0.99
    • Learn More
    Copyright
    © 2026 Mihail Duchev
  • Developer Website
  • Privacy Policy

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