Dev Tool box vs API Client
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Dev Tool box
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DevToolbox is an essential collection of developer utilities designed to streamline your coding workflow. Whether you're debugging APIs, encoding data, or formatting JSON, DevToolbox provides the tools you need in a clean, native interface. KEY FEATURES: ⢠JSON Formatter & Validator Format, validate, and beautify JSON with syntax highlighting. Tree view visualization for better structure understanding. Built-in search functionality to find text within large JSON files. ⢠URL Encoder/Decoder Quickly encode or decode URLs for API testing and web development. RFC 3986 compliant encoding for maximum compatibility. ⢠Base64 Encoder/Decoder Convert text to Base64 and vice versa. Supports URL-safe Base64 and auto-padding. Perfect for encoding credentials, tokens, and data URIs. ⢠JWT Decoder Decode and inspect JSON Web Tokens without external services. View header, payload, and signature details instantly. Automatically handles "Bearer " prefix. ⢠Text Case Converter Transform text between various cases: camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE_CASE, dot.case, UPPERCASE, lowercase, and Title Case. Smart parsing for any input format. ⢠Hash Generator Generate secure hashes using MD5, SHA-1, SHA-256, and SHA-512 algorithms. Essential for checksum verification and security testing. ⢠Unix Timestamp Converter Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds. Multiple output formats including ISO 8601, UTC, and local time. ⢠Number Base Converter Convert between Decimal, Binary, Octal, and Hexadecimal. Auto-detects input format with 0x, 0b, 0o prefix support. ⢠String Escape/Unescape Escape special characters for JSON strings or unescape encoded text. Handles \n, \t, \", \\ and more. ⢠Color Converter Convert HEX colors to RGB and HSL with live preview. Generates ready-to-use SwiftUI, UIKit, and CSS code snippets. WHY DEVTOOLBOX? ⢠Native Performance: Built with SwiftUI for blazing-fast performance ⢠Privacy First: All processing happens locally on your device ⢠Universal App: Works seamlessly on iPhone, iPad, and Mac ⢠Dark Mode Support: Easy on the eyes during late-night coding sessions ⢠No Ads, No Tracking: Just pure functionality ⢠Offline Ready: No internet connection required Perfect for mobile developers, web developers, API developers, QA engineers, security professionals, and students learning to code. DevToolbox is your pocket-sized development companion. Stop switching between websites and online tools - get everything you need in one native app.
API Client
Test REST APIs directly from your mobile device. Paste URLs, select methods, and view detailed responses including status codes, headers, and formatted JSON. Manage environments, save requests, and even import/export cURL commands.
- Paste URL and send requests
- Smart JSON viewer with search
- Environment management
- Collections and history
- cURL import and export
- API monitoring
- Test suites and assertions
- API docs generator
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Test any API right from your phone. Paste a URL, hit send, see the response. API Client is a lightweight REST and HTTP tester. No account needed. No cloud sync. No setup. Just open the app and start testing. āø JUST PASTE & SEND Enter any URL, pick a method (GET, POST, PUT, PATCH, DELETE), and tap Send. See status codes, response time, headers, and formatted JSON ā all in one view. āø SMART JSON VIEWER Collapsible JSON tree with search, tap-to-copy, and syntax highlighting. Format or minify JSON with one tap. Build request bodies visually without typing raw JSON. āø ENVIRONMENTS Switch between development, staging, and production with one tap. Each environment stores its own base URL, bearer token, API key, and custom headers. Use {{variables}} across all requests. āø COLLECTIONS & HISTORY Save requests to collections. Pin favorites for quick access. Full history grouped by date with one-tap rerun. Search across all saved requests. āø cURL IMPORT & EXPORT Paste any cURL command to import instantly. Export any request as cURL to share with your team or use in terminal scripts. āø API MONITORING Set up automatic health checks for your endpoints. Get push notifications when an API goes down or degrades. Track incidents and recovery times. āø TEST SUITES & ASSERTIONS Group requests into test suites. Add response assertions ā validate status codes, check JSON fields, verify headers. Run all tests with one tap. āø API DOCS GENERATOR Generate shareable PDF documentation for any endpoint ā method, URL, headers, body, response samples, and status codes included. WORKS GREAT FOR ⢠Developers testing REST APIs from anywhere ⢠Students learning HTTP methods and API concepts ⢠QA engineers validating endpoints ⢠DevOps checking microservice health ⢠Anyone who needs an API client on mobile WHY API CLIENT? This app runs entirely on your device. Your API keys and tokens stay on your phone. No sign-up required ā just open and test. SUBSCRIPTION AND PRICING ⢠RESTPilot Pro Lifetime ā $9.99, one payment ⢠RESTPilot Pro Monthly ā $1.99 per month, renews automatically ⢠Payment is charged to your Apple Account at confirmation of purchase ⢠A subscription renews unless it is cancelled at least 24 hours before the end of the current period ⢠Manage or cancel anytime in your Apple Account settings Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cosmovex.web.app/apps/restpilot/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: Dev Tool box at none against API Client's 8. API Client's advantage is ads (none vs shown) and iOS requirement (14.0 vs 18.0). On price, update cadence and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. API Client sells 8 in-app purchases, starting at $1.99 per month. Dev Tool box asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Dev Tool box | API Client |
|---|---|---|
| Price | Free | Free |
| Positive reviews | ā | 0.0% of reviews |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | Yes | No ā better |
| In-app purchases | No ā better | Yes |
| Monetization | ā | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 14.0 ā better |
| Further details ā not scored | ||
| Size | 4 MB | 41 MB |
| Age rating | 4+ | 17+ |
| Developer | Seonggon Sim | Sahana A S |
In-app purchases
Dev Tool box
No in-app purchases
API Client
- RESTPilot Pro Monthly$1.991 Month
- Pro Lifetime Limited Offer$5.99
- Pro Lifetime Limited Offer$7.99
- Pro Lifetime Limited Offer$9.99
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- Pro Lifetime Limited Offer$11.99
- Pro Lifetime Limited Offer$13.99
- Pro Lifetime Limited Offer$15.99
- Ad Free experience$19.99









