Comparison

API Zen vs API Tool Pro

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

Head to head
About

API Zen

Features
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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.

About

API Tool Pro

Features
Read full description

Network Stream Test is a powerful and user-friendly tool for developers and testers. Effortlessly create, send, and manage HTTP and WebSocket requests, view detailed responses, and organize your API calls with tabs, history, and collections. The app also supports network stream testing, including m3u8 (HLS) video playback, making it ideal for streaming developers. Features include file and image upload, environment variable management, authentication support, and a modern, customizable interface with light and dark themes. Perfect for debugging, learning, and streamlining your API and streaming workflow. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

API Zen4 screens
API Tool Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: API Tool Pro at none against API Zen's 3. API Tool Pro also leads on update cadence (every 3 days vs every 2 months). On price, ads, 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. API Zen sells 3 one-off in-app purchases. API Tool Pro asks for nothing beyond the download.

UpkeepUpdate frequency

API Zen ships an update every 2 months, API Tool Pro every 3 days. The most recent releases landed on September 15, 2026 and June 26, 2026 respectively.

Scorecard2 real differences · 4 level
API Zen versus API Tool Pro: the parameters behind the verdict, then further details
ParameterAPI ZenAPI Tool Pro
PriceFreeFree
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size7 MB37 MB
Age rating4+4+
DeveloperJaseem Valiya ValappilAshen Ishanka Costha

In-app purchases

3 purchases

API Zen

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

API Tool Pro

No in-app purchases

Questions

Is API Zen free?
API Zen is free to download, with in-app purchases available.
Is API Tool Pro free?
API Tool Pro is free to download, with no in-app purchases.
Do API Zen or API Tool Pro have ads?
Neither API Zen nor API Tool Pro shows ads.
Which is updated more often, API Zen or API Tool Pro?
API Zen ships an update every 2 months, and API Tool Pro every 3 days. Most recently, API Zen was updated on September 15, 2026 and API Tool Pro on June 26, 2026.

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