Harness Chat

Productivity

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Hundreds of AI models on your own key — web search, real file downloads, automatic memory, and on-device models that work fully offline. Harness Chat is a beautifully simple AI chat app where you bring your own key. The app is free. You pay nobody but the models themselves: paste your OpenRouter API key (two minutes, guided in-app) and chat with hundreds of AI models — DeepSeek, MiniMax, Claude, GPT, Gemini, and more — at raw API prices. No subscription, no markup, no middleman. NO ACCOUNT NEEDED Signing in with Apple or Google is completely optional — it exists only to sync your chats and memory between your phone and the web/desktop app. Skip it entirely and everything stays on your device: your key, your chats, your business. PRIVATE BY DESIGN Because you're billed at the API level, your conversations fall under model providers' API data policies — not used to train models, unlike free consumer chatbots. No ads, no tracking, no analytics. If you do sign in, you can export everything we hold — every chat and memory — as one JSON file, anytime. WHAT IT DOES • Real tools: web search, plus files you can actually download — PDFs, spreadsheets, presentations, even small apps and games • Automatic memory (signed in): it learns your preferences across chats • Optional sync: chats follow you between phone and web when signed in • On-device models: download a small model and chat entirely offline, free • Effort control, live cost tracking, and your context usage at a glance A free OpenRouter account and API key unlock cloud models; on-device models need nothing at all.

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The developer, JADEN CALEB KWEK, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • User Content
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
JADEN CALEB KWEK
Size
18.4 MB
Category
Productivity
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
13+
  • 13+
  • Learn More
  • Infrequent
    Cartoon or Fantasy Violence
    Realistic Violence
    Profanity or Crude Humor
    Mature or Suggestive Themes
    Horror/Fear Themes
    Medical Treatment information
    Alcohol, Tobacco, Drug Use or References
    Sexual Content or Nudity
    Guns or Other Weapons

    Contains
    Messaging and Chat
    Health or Wellness Topics
Copyright
© 2026 Jaden Kwek
  • Developer Website
  • Privacy Policy

    • More by JADEN CALEB KWEK

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