Xprompt: Foundation Model Lab

Test and compare AI prompts

$0.99

Also Included In

ForM is now Xprompt, part of Caio's Creative Studio. Compare the on-device model and Private Cloud Compute side by side, with exact token counts. Xprompt is a lab for Apple's Foundation Models. Write a prompt, tune it, and see exactly how the model responds, before it ever ships in your app. TWO MODELS, ONE PLACE Run prompts on the on-device model, or on Apple's server model through Private Cloud Compute, with a larger context window and deeper reasoning. Switch per chat, any time. COMPARE SIDE BY SIDE Split any chat in two and send every prompt to both. Try different models, temperatures, sampling or reasoning levels, with timing and token counts under each answer. SEE WHAT THE MODEL SEES • Exact input, output and reasoning token counts • A live meter that shows how full the context window is • The model's reasoning, streamed as it thinks • Clear errors when a prompt is refused, rate limited or runs out of context ITERATE FAST • Edit any message and resend it, or branch a conversation into a new chat • Change the instructions mid-chat; the next reply uses them • Attach images and ask about them • Temperature, sampling and reasoning controls • Markdown with code blocks and tables BUILT FOR iPAD AND MAC A native sidebar, keyboard shortcuts, Dynamic Type and VoiceOver throughout. Available in English, Portuguese, Spanish, Italian and Chinese. No accounts and no API keys. On-device chats never leave your device, and Private Cloud Compute is Apple's privacy-first cloud. Requires Apple Intelligence. Image prompts, reasoning and Private Cloud Compute need iPadOS 27 or macOS 27. Private Cloud Compute has a daily usage limit set by Apple. PART OF CAIO'S CREATIVE STUDIO Xshirt, Xprompt and Xspeak are three apps for iPad and Mac by Caio Agra Lemos, made for the ideas you put out.

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ForM is now Xprompt, part of Caio's Creative Studio with Xshirt and Xspeak. Same app, same chats, new name.

Version 2.1

The developer, Caio Agra Lemos, 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, for example, based on the features you use or your age. Learn More

    The developer indicated that this app supports the following accessibility features. Learn More

    • Supported Features

      • VoiceOver

      • Larger Text

      • Dark Interface

      • Differentiate Without Color Alone

      • Sufficient Contrast

      • Reduced Motion

    Information

    Seller
    Caio Agra Lemos
    Size
    9.1 MB
    Category
    Utilities
    Compatibility
    Requires iPadOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    English and 4 more
    • English, Italian, Portuguese, Simplified Chinese, Spanish
    Age Rating
    13+
    • 13+
    • Learn More
    • Infrequent
      Medical Treatment information

      Contains
      User-Generated Content
    Copyright
    © 2026 Caio Agra Lemos
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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