Comparison

API Zen vs Curly

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

Head to head
About

API Zen

Features
Read full description

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 โ€ข Simple and intuitive request composer and viewer โ€ข Supports headers, request parameters, request body with JSON, XML, raw input, forms with file, image attachments, multipart and binary data โ€ข Organize endpoints into workspaces and projects โ€ข Enable iCloud syncing when creating a new workspace. If syncing is disabled workspace will be created on device only. โ€ข Seamless switching between local and iCloud workspaces โ€ข Option to add custom HTTP methods per project โ€ข Detailed response information which includes headers, cookies, metrics and connection information โ€ข View raw response with syntax highlighting โ€ข Preview HTML response output as web page โ€ข View all response history โ€ข SSL validation per request โ€ข Environment group with variables per workspace with option to select different environment per request โ€ข Supports dark mode โ€ข Import/Export workspace data API Zen is free for use. The app accepts optional donations which supports the development work.

About

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.

Highlights
  • 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
Features
Read full description

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

API Zen4 screens
Curly4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. API Zen sells 3 one-off in-app purchases. Curly asks for nothing beyond the download.

UpkeepUpdate frequency

API Zen ships an update every 2 months, Curly every 2 days. Both last shipped on September 15, 2026.

Scorecard3 real differences ยท 5 level
API Zen versus Curly: the parameters behind the verdict, then further details
ParameterAPI ZenCurly
PriceFreeFree
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 2 monthsEvery 2 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
Monetizationโ€”Free
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.0 โ€” better17.0
Further details โ€” not scored
Size7 MB5 MB
Age rating4+4+
DeveloperJaseem Valiya ValappilArtem Sharifullin

In-app purchases

3 purchases

API Zen

One-time3
  • Thanks$3.99
  • Thank you$5.99
  • Thank you very much$7.99
None

Curly

No in-app purchases

Questions

Is API Zen free?
API Zen is free to download, with in-app purchases available.
Is Curly free?
Curly is free to download, with no in-app purchases.
Do API Zen or Curly have ads?
Neither API Zen nor Curly shows ads.
Which is updated more often, API Zen or Curly?
API Zen ships an update every 2 months, and Curly every 2 days. Most recently, API Zen was updated on September 15, 2026 and Curly on September 15, 2026.

Other comparisons