Comparison

Chat API vs Invoke

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

Head to head
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

About

Invoke

This app allows you to chat with your own locally hosted AI models, offering a private and secure experience. It connects to Ollama or LM Studio servers on your local network, requiring some technical setup for a fully offline AI conversation.

Highlights
  • Connects to local LLM servers
  • Offline and privacy-focused
  • Supports Ollama and LM Studio
  • Real-time message streaming
  • Chat history management
  • Dark Mode support
Features
Read full description

Note: This app is intended for users who are able to set up a local LLM server (Ollama or LM Studio) within their own LAN environment. Some technical setup is required. Chat with your local LLM! Seamlessly connect to Ollama or LM Studio for a fully offline, privacy-focused AI chat experience! This iOS app connects to a locally hosted Large Language Model (LLM) server and enables seamless, natural conversations. Compatible with Ollama and LM Studio via HTTP, it provides real-time message streaming and intuitive chat history management. The app operates entirely within a local network—no internet connection required—making it ideal for those who prioritize privacy and security. Key Features: - Easy connection to local LLM servers (Ollama / LM Studio) - Natural chat UI with bubble-style layout - Auto-saving and browsing chat history - Server and model selection via settings screen - Supports Dark Mode

Screenshots

Chat API4 screens
Invoke3 screens

Verdict

The call

The clearest difference is rating: Chat API at 4.2 against Invoke's 3.3. Chat API also leads on review sentiment (75% vs 58%) and iOS requirement (14.0 vs 16.6). Invoke's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume, update cadence and device support 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. Chat API sells 3 in-app purchases, starting at $1.99 per month. Invoke asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Chat API holds the better App Store score, 4.2 against 3.3. Both are backed by a comparable volume of ratings — 5 and 10 respectively. Written reviews point the same way: 75% of Chat API's written reviews are positive against 58% of Invoke's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

Scorecard6 real differences · 4 level
Chat API versus Invoke: the parameters behind the verdict, then further details
ParameterChat APIInvoke
PriceFreeFree
Rating4.2 (5 ratings) — better3.3 (10 ratings)
Positive reviews75.0% of reviews — better58.3% of reviews
Number of ratings510 — better
Update frequencyWeeklyWeekly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.6
Further details — not scored
Size78 MB3 MB
Age rating17+4+
DeveloperAndres Nunez Sotokazuhiko sugimoto

Customer experience

Chat API

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Invoke

All ratings10 ratings
Positive70.0%
Neutral0.0%
Negative30.0%
Written reviews12 reviews
Positive58.3%
Neutral0.0%
Negative41.7%

In-app purchases

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
None

Invoke

No in-app purchases

Questions

Is Chat API free?
Chat API is free to download, with in-app purchases available.
Is Invoke free?
Invoke is free to download, with no in-app purchases.
Which has better reviews, Chat API or Invoke?
Chat API is rated higher. Chat API averages 4.2 out of 5 from 5 ratings, while Invoke averages 3.3 from 10 ratings.
Do Chat API or Invoke have ads?
Chat API shows ads; Invoke does not.
Which is updated more often, Chat API or Invoke?
Chat API ships an update weekly, and Invoke weekly. Most recently, Chat API was updated on September 17, 2026 and Invoke on September 10, 2026.

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