RegExpress vs SQL Practice

RegExpress is a complete regular expression toolkit for iPhone, iPad, and Mac. Create, test, understand, and refine regex patterns in one focused workspace, whether you are learning the basics or maintaining production expressions. Test with the flavor you actually use. RegExpress supports Swift Regex, Foundation (ICU), JavaScript/ECMAScript, Python Compatibility Mode, and native PCRE2. Flavor-aware options, syntax references, examples, diagrams, comparisons, and compatibility details help you spot differences before they become bugs. Write and test with confidence See live matches and capture groups as you type. Switch between automatic and manual execution, inspect clear errors, and keep the editor responsive during demanding patterns. Built-in safety analysis identifies potential backtracking risks, while find and replace lets you preview changes before applying them. Focus on complex patterns Open the multiline Focus Editor for more room, syntax-aware tools, a persistent token dock, flavor-specific options, visual railroad diagrams, code snippets, and quick access to the Pattern Builder, test suites, and reference material. Understand and improve every expression Turn plain-language requirements and examples into a regex. Explore explanations, recommendations, optimization suggestions, debugging tools, diagrams, and a searchable cheat sheet. Compare patterns by matches, compatibility, and performance to choose the right approach. Build a reusable regex workflow Save patterns, organize them into folders and automatic collections, keep history, and create test suites with positive and negative cases. Save complete .regexpress workspaces, reopen .regproj test projects, import shared content, and generate code for your project. A command palette, Spotlight integration, App Shortcuts, multiwindow support, and sharing tools keep common actions close at hand. Learn by doing Browse flavor-aware examples, follow guided tutorials, use the syntax reference, and practice with challenges designed for different skill levels. A useful free experience Core editing, unlimited live matching, all five engines, standard options, capture results, find and replace, examples, reference material, and Swift code generation are free. You can also save up to 20 patterns, keep 50 recent history items, create one test suite with up to 10 manual cases, and use selected previews of advanced tools. RegExpress Pro is available as a one-time purchase with no subscription. Pro unlocks deeper debugging and performance analysis, complete visual tools, advanced generation and optimization, additional code targets, unlimited tests and saved content, iCloud sync, advanced organization, and more. Whether you need a quick match, a visual explanation, or a repeatable testing workflow, RegExpress helps you build regex with clarity and confidence.

Learn SQL in 15-minute daily sessions — on your phone, anywhere. SQL Practice turns idle moments into practical data skills. With interactive exercises, realistic datasets, and instant feedback, you’ll build SQL confidence from beginner fundamentals to interview-ready skills. Who it’s for: - Career changers entering tech - Professionals adding SQL to their toolkit - Students preparing for technical interviews - Anyone curious about data and databases Why it’s different: - Learn by doing: write and run real SQL queries - SQL Patterns (Pro): understand reusable approaches instead of memorizing answers - Database Bits (Pro): build intuition with short, visual lessons - Smarter feedback (Pro): see why your result differs from the expected output - Progressive curriculum: start with the fundamentals and advance at your own pace - Mobile-first design: practice whenever you have a few spare minutes When you get stuck: With Pro, SQL Practice helps you move forward without immediately giving away the answer. Use progressive hints, compare your results with the expected output, and explore SQL X-Ray explanations that break queries into understandable steps. What you’ll learn: - SELECT, WHERE, ORDER BY, and filtering - JOINs and relationships between tables - COUNT, SUM, AVG, GROUP BY, and HAVING - Subqueries and advanced query techniques - Reusable SQL patterns (Pro) - Core database concepts, indexes, and data design (Pro) Practice your way: - Guided SQL lessons - Easy, medium, and hard exercises - Quick drills - Short visual database lessons (Pro) - Daily practice challenges - Streaks, XP, achievements, and progress tracking - Hardcore mode: turn off the advanced SQL keyboard and solve the toughest challenges without assistance—the highest level of SQL practice. Free and Pro: Core SQL lessons, exercises, drills, streaks, and basic progress tracking are free. An optional auto-renewing Pro subscription unlocks SQL Patterns, Database Bits, progressive hints, detailed result comparisons, and SQL X-Ray step-by-step explanations. Available plans, billing periods, trial eligibility, and localized prices are shown before purchase. No purchase is required to use the core learning and practice features. Start your data journey today — no prior coding experience required, just 15 minutes of curiosity. Privacy Policy: https://martongreber.github.io/mvp/privacy.html Terms of Use: https://martongreber.github.io/mvp/terms.html