Cumbersome: AI API Client

OpenAI & Anthropic API Client

Free

NOTE: Requires API keys from OpenAI, Anthropic, or Google AI Studio. Not plug-and-play like ChatGPT or Claude. Cumbersome is the manual transmission of AI apps. More complex than consumer products, but with far greater control and transparency that power users demand. Face/Off Mode is the flagship feature: generate 3 AI responses with different creativity levels, then an AI judge evaluates all 3 and crowns the winner. Get the best response on the first try. WHAT YOU GET — Face/Off Mode: 3 responses compete, AI judge picks the winner — Direct access to flagship AI models without corporate downgrades — Document-style workspace instead of cramped chat bubbles — Edit any conversation message to improve context and responses — Switch between AI providers mid-conversation — Native apps for iPhone, iPad, Mac with iCloud sync — Complete privacy: your data never touches our servers — Transparent pricing: pay providers directly at cost WHY CUMBERSOME EXISTS Consumer AI apps route requests to cheaper models behind the scenes, hide costs with subscriptions, and cram serious work into chat bubble interfaces designed for texting. You bring your own API keys and connect directly to AI providers. We're out of the money flow and data collection business entirely. KEY FEATURES Face/Off Mode: Generate 3 responses with different creativity levels. An AI judge evaluates all 3, picks the winner, and explains why. Perfect for critical tasks where quality matters more than cost. Direct Model Access: Connect to actual flagship models. No secret routing to cheaper versions. Document Workspace: Full-screen document interface for real work. Edit AI responses inline, view markdown rendering, and actually read long outputs without scrolling through chat bubbles. Conversation Editing: Edit any message in your chat history. Remove off-topic messages, fix context drift, create perfect conversation templates. Multi-Provider Switching: Switch between OpenAI, Google, and Anthropic mid-conversation. Compare responses side-by-side. Cross-Device Sync: Native apps for iPhone, iPad, and Mac. Everything syncs via your personal iCloud—not our servers. True Privacy: Your device connects directly to AI providers. We literally cannot see your conversations. We have no backend database. Cost Transparency: See exactly what each request costs in real-time. Most users spend $2-10/month instead of $40-60 for multiple AI subscriptions. WHO THIS IS FOR Perfect for developers, researchers, and power users frustrated with consumer AI apps that secretly downgrade performance, impose artificial limits, and collect your data. GETTING STARTED 1. Download Cumbersome (100% free) 2. Create developer accounts at OpenAI, Google AI Studio, and/or Anthropic 3. Generate API keys in their developer consoles 4. Enter your keys in Cumbersome 5. Start chatting with flagship models at transparent costs HONEST WARNINGS This app requires technical knowledge. You'll manage API keys, see technical parameters, and need to understand model differences. If you want AI to "just work," stick with consumer apps. If you want control, transparency, document-style workspace, and complete privacy—welcome to the complexity you've been missing. PRICING The app is 100% free. You pay AI providers directly through your own accounts. No subscriptions, no markup, no data monetization.

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TUNE ALL API PARAMS: Power users can now send custom parameters directly to AI provider APIs. Access advanced features like reasoning effort controls, sampling parameters, and custom stop sequences without waiting for app updates. - Configure parameters in Advanced Features modal (tap + button in chat) - Works across OpenAI, Anthropic, and Gemini - Override built-in settings when needed - Syncs via iCloud across all your devices Other Improvements: - Enhanced chat input layout with improved button placement - Platform-specific UI refinements for iOS and macOS - Better handling of complex API configurations

Version 1.9.0

The developer, Folding Sky Co, 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 Not Collected

    The developer does not collect any data from this app.

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

    Accessibility

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    Information

    • Provider
      • Folding Sky Co
    • Size
      • 18.4 MB
    • Category
      • Productivity
    • Compatibility
      Requires iOS 18.0 or later.
      • iPhone
        Requires iOS 18.0 or later.
      • iPad
        Requires iPadOS 18.0 or later.
      • Mac
        Requires macOS 15.0 or later.
      • Apple Vision
        Requires visionOS 2.0 or later.
    • Age Rating
      13+
      • 13+
      • Learn More
      • Infrequent
        Profanity or Crude Humour
        Mature or Suggestive Themes
        Horror/Fear Themes
        Medical Treatment Information
        Alcohol, Tobacco, Drug Use or References
        Sexual Content or Nudity
        Guns or Other Weapons
    • Copyright
      • © 2025 Folding Sky Co
  • Developer Website
  • Privacy Policy

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