API Zen vs RequestLab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
API Zen
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API Zen brings the convenience of HTTP API endpoint testing on the go. With its intuitive request composer and detailed response information, it helps developers test endpoints with ease. Main features • Simple and intuitive request composer and viewer • Supports headers, request parameters, request body with JSON, XML, raw input, forms with file, image attachments, multipart and binary data • Organize endpoints into workspaces and projects • Enable iCloud syncing when creating a new workspace. If syncing is disabled workspace will be created on device only. • Seamless switching between local and iCloud workspaces • Option to add custom HTTP methods per project • Detailed response information which includes headers, cookies, metrics and connection information • View raw response with syntax highlighting • Preview HTML response output as web page • View all response history • SSL validation per request • Environment group with variables per workspace with option to select different environment per request • Supports dark mode • Import/Export workspace data API Zen is free for use. The app accepts optional donations which supports the development work.
RequestLab
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RequestLab is a simple, free, multi-platform tool designed for HTTP API development, debugging, and testing. Run and test your various HTTP requests against your endpoints and check the results. It is intended as a native alternative to programs like Postman, Thunder Client, Bruno, etc. for Apple devices. You can run RequestLab on your Mac, iPhone, iPad, and Vision Pro while enjoying the same functionality. Additionally, you have the convenience of sharing your requests between these devices using the import/export functionality. - Create and edit HTTP requests: GET, POST, HEAD, OPTIONS, DELETE, PUT, TRACE, CONNECT, PATCH - Supported authentication methods: Basic, Bearer - Import/Export from and to JSON format for sharing your request - No user tracking, no subscription, no login required. What happens on your device stays on your device.
Screenshots
Verdict
The clearest difference is in-app purchases: RequestLab at none against API Zen's 3. RequestLab also leads on update cadence (every 3 weeks vs every 2 months). API Zen's advantage is iOS requirement (13.0 vs 16.0). On price, ads and device support 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. API Zen sells 3 one-off in-app purchases. RequestLab asks for nothing beyond the download.
API Zen ships an update every 2 months, RequestLab every 3 weeks. The most recent releases landed on September 15, 2026 and September 22, 2026 respectively.
| Parameter | API Zen | RequestLab |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Vision Pro |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 7 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Jaseem Valiya Valappil | Martin Albrecht |
In-app purchases
API Zen
- Thanks$3.99
- Thank you$5.99
- Thank you very much$7.99
RequestLab
No in-app purchases






