Comparison

API Testing Tool vs RegExpress

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

API Testing Tool

This tool allows developers and QA engineers to test and debug APIs directly from their mobile devices. It supports various HTTP request methods, provides detailed response previews, and offers organized storage for saved requests.

Highlights
  • Customizable HTTP requests (GET, POST, PUT)
  • Detailed response preview
  • Organized storage for API requests
  • SQLite and iCloud integration
  • Debug APIs on device
Features
Read full description

Take your API testing to the next level with this user-friendly and efficient API Testing Tool! Designed for developers, QA engineers, and tech enthusiasts, this app provides a seamless way to test and debug APIs right from your device Key Features: • Customizable Requests: Easily configure GET, POST, PUT, and other HTTP requests with full control over headers, parameters, and payloads. • Response Preview: View raw responses, including status codes and data, for detailed debugging. • Organized Storage: Save and organize your API requests locally for quick access and reusability. • SQLite Integration: All your configurations are stored both on device and seamlessly using iCloud

About

RegExpress

This app is a comprehensive tool for building, testing, and debugging regular expressions. It offers real-time matching, syntax highlighting, and supports multiple regex flavors. Learn and practice with tutorials, puzzles, and challenges.

Highlights
  • Real-time regex matching
  • Support for 5 regex flavors
  • Step-by-step regex debugger
  • Pattern Library for saving patterns
  • Learning tutorials and daily puzzles
  • iCloud sync for Pro users
  • Universal app for iOS and Mac
Features
Read full description

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.

Screenshots

API Testing Tool4 screens
RegExpress4 screens

Verdict

The call

The clearest difference is review sentiment: API Testing Tool at 100% against RegExpress's 0%. API Testing Tool also leads on in-app purchases (none vs 4). RegExpress's advantage is price (Free vs $1.99) and device support (3 vs 1). On update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

RegExpress is free to download; API Testing Tool costs $1.99 up front. RegExpress sells 4 one-off in-app purchases. API Testing Tool asks for nothing beyond the download.

UpkeepUpdate frequency

API Testing Tool ships an update every 2 weeks, RegExpress every 3 weeks. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

Scorecard6 real differences · 4 level
API Testing Tool versus RegExpress: the parameters behind the verdict, then further details
ParameterAPI Testing ToolRegExpress
Price$1.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS18.016.6 — better
Further details — not scored
Size3 MB8 MB
Age rating4+4+
DeveloperANDREI EDUARD ISTRATENevv Atlantis LLC

Customer experience

API Testing Tool

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RegExpress

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

API Testing Tool

No in-app purchases

4 purchases

RegExpress

One-time4
  • Tip $1$0.99
  • Tip3$2.99
  • RegExpress Pro$4.99
Show 1 more
  • Tip5$4.99

Questions

Is API Testing Tool free?
API Testing Tool costs $1.99, with no in-app purchases.
Is RegExpress free?
RegExpress is free to download, with in-app purchases available.
Do API Testing Tool or RegExpress have ads?
Neither API Testing Tool nor RegExpress shows ads.
Which is updated more often, API Testing Tool or RegExpress?
API Testing Tool ships an update every 2 weeks, and RegExpress every 3 weeks. Most recently, API Testing Tool was updated on October 7, 2026 and RegExpress on October 21, 2026.

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