API Zen vs Curly
Price, ratings, monetisation and update history for both apps, side by side โ 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 โข Simple and intuitive request composer and viewer โข Supports headers, request parameters, request body with JSON, XML, raw input, forms with file, image attachments, multipart and binary data โข Organize endpoints into workspaces and projects โข Enable iCloud syncing when creating a new workspace. If syncing is disabled workspace will be created on device only. โข Seamless switching between local and iCloud workspaces โข Option to add custom HTTP methods per project โข Detailed response information which includes headers, cookies, metrics and connection information โข View raw response with syntax highlighting โข Preview HTML response output as web page โข View all response history โข SSL validation per request โข Environment group with variables per workspace with option to select different environment per request โข Supports dark mode โข Import/Export workspace data API Zen is free for use. The app accepts optional donations which supports the development work.
Curly
A native REST API client for iOS and iPad, designed for developers to test and debug APIs efficiently. It supports various request methods, response inspection with syntax highlighting, and collection organization.
- Send GET, POST, PUT, PATCH, DELETE requests
- Edit query params, headers, auth, and request body
- JSON syntax highlighting for responses
- Organize endpoints into collections
- Import Postman and Bruno collections
- Environment variables with autocomplete
- Pre-request and post-response scripts
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Curly is a native REST API client built for iOS and iPad. Designed for developers who need a fast, lightweight tool to test and debug APIs directly from their device. Features: - Send GET, POST, PUT, PATCH, DELETE requests - Edit query params, headers, auth, and request body - Inspect responses with JSON syntax highlighting - Filter JSON responses with JSONPath expressions - Organize endpoints into collections with emoji icons and nested folders - Drag-and-drop requests between folders - Import Postman and Bruno collections - Import requests by pasting cURL commands - Copy requests as cURL for sharing - Environment variables with autocomplete, inline preview, and bulk import across environments - Pre-request and post-response scripts - View response headers, status codes, timing, and size
Screenshots
Verdict
The clearest difference is in-app purchases: Curly at none against API Zen's 3. Curly also leads on update cadence (every 2 days vs every 2 months). API Zen's advantage is iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. API Zen sells 3 one-off in-app purchases. Curly asks for nothing beyond the download.
API Zen ships an update every 2 months, Curly every 2 days. Both last shipped on September 15, 2026.
| Parameter | API Zen | Curly |
|---|---|---|
| Price | Free | Free |
| Positive reviews | โ | 100.0% of reviews |
| Update frequency | Every 2 months | Every 2 days โ better |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Monetization | โ | Free |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 13.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 7 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Jaseem Valiya Valappil | Artem Sharifullin |
In-app purchases
API Zen
- Thanks$3.99
- Thank you$5.99
- Thank you very much$7.99
Curly
No in-app purchases









