Comparison

REST API Client vs API Zen

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

Head to head
About

REST API Client

This tool allows users to send and analyze API requests with customizable parameters, authorization, and body content. It offers robust search and filtering capabilities for managing saved requests, optimized for iPadOS with keyboard support.

Highlights
  • Send and analyze API requests
  • Customize query parameters, authorization, and headers
  • Support for four body types
  • Search and filter requests
  • Create, save, update, and delete requests
  • Optimized for iPadOS with keyboard support
Features
Read full description

Send and analyze requests with detailed response headers and results. Add query parameters, authorization tokens, headers, or body content to tailor every request. Choose from four flexible body types: none, form-data, form-urlencoded, or raw. Search and filter requests by name, URL, HTTP method, or modified date, and organize them by month or year. Create, save, update, or delete requests seamlessly within the REST API Client. Fully optimized for iPadOS, with support for Smart/Magic Keyboard and time-saving keyboard shortcuts.

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 • 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.

Screenshots

REST API Client4 screens
API Zen4 screens

Verdict

The call

The clearest difference is ads: API Zen at none against REST API Client's shown. REST API Client's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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

Both are free to download. REST API Client sells 1 one-off in-app purchase and API Zen sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

REST API Client ships an update every 3 weeks, API Zen every 2 months. The most recent releases landed on September 21, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 7 level
REST API Client versus API Zen: the parameters behind the verdict, then further details
ParameterREST API ClientAPI Zen
PriceFreeFree
Rating4.3 (6 ratings) — better—
Number of ratings6 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size17 MB7 MB
Age rating4+4+
DeveloperTevon WallaceJaseem Valiya Valappil

In-app purchases

1 purchases

REST API Client

One-time1
  • Remove Ads$1.99
3 purchases

API Zen

One-time3
  • Thanks$3.99
  • Thank you$5.99
  • Thank you very much$7.99

Questions

Is REST API Client free?
REST API Client is free to download, with in-app purchases available.
Is API Zen free?
API Zen is free to download, with in-app purchases available.
Do REST API Client or API Zen have ads?
REST API Client shows ads; API Zen does not.
Which is updated more often, REST API Client or API Zen?
REST API Client ships an update every 3 weeks, and API Zen every 2 months. Most recently, REST API Client was updated on September 21, 2026 and API Zen on October 2, 2026.

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