Comparison

API Zen vs Chat API

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
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.

About

Chat API

Access powerful AI models locally or through cloud APIs. This tool offers flexible integration with GPT-4, OpenAI, Grok, and local LLMs for diverse tasks like coding, drafting, and research.

Highlights
  • Private local LLM support with Ollama
  • OpenAI and Grok API integration
  • Built-in text-only GPT-4 model
  • Bing-powered real-time searches
  • Image generation capabilities
  • Seamless model switching
Features
Read full description

Run private local LLM AI models with Ollama, or unleash AI through OpenAI & Grok APIs for advanced features and flexibility. ChatAPI offers a built-in text-only GPT-4 model for instant AI access, plus support for OpenAI API, Grok API, local LLM Ollama models, and Bing-powered real-time searches. - Flexible AI Access: Use the onboard GPT-4, connect Ollama for running private AI locally on your own PC or server, or integrate OpenAI/Grok/Bing APIs for advanced features like image generation. - Versatile & Powerful: Seamlessly switch between models for drafting, coding, brainstorming, or research with fast, reliable responses. Subscription Options: - Monthly: Unlimited GPT-4, OpenAI/Grok/Bing API integration, and Ollama support. - Yearly: Same as monthly, with cost savings. Download ChatAPI for flexible, private, and powerful AI interactions! Privacy Policy: https://sites.google.com/view/gpt-lite/privacy Terms of Use: https://sites.google.com/view/gpt-lite/terms Support: https://sites.google.com/view/gpt-lite/support

Screenshots

API Zen4 screens
Chat API4 screens

Verdict

The call

The clearest difference is ads: API Zen at none against Chat API's shown. Chat API's advantage is update cadence (weekly 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. API Zen sells 3 one-off in-app purchases and Chat API sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

API Zen ships an update every 2 months, Chat API weekly. The most recent releases landed on October 2, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
API Zen versus Chat API: the parameters behind the verdict, then further details
ParameterAPI ZenChat API
PriceFreeFree
Rating—4.2 (5 ratings) — better
Positive reviews—75.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 2 monthsWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size7 MB78 MB
Age rating4+17+
DeveloperJaseem Valiya ValappilAndres Nunez Soto

In-app purchases

3 purchases

API Zen

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

Chat API

Subscriptions3
  • Unlimited Access (Monthly)7 Days trial$1.991 Month
  • Unlimited Access (Yearly)$19.991 Year
  • Pro Supporter Yearly$49.991 Year

Questions

Is API Zen free?
API Zen is free to download, with in-app purchases available.
Is Chat API free?
Chat API is free to download, with in-app purchases available.
Do API Zen or Chat API have ads?
Chat API shows ads; API Zen does not.
Which is updated more often, API Zen or Chat API?
API Zen ships an update every 2 months, and Chat API weekly. Most recently, API Zen was updated on October 2, 2026 and Chat API on October 30, 2026.

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