Cloak AI - Local AI Assistant

Get private, on-device AI for iPhone and iPad. Chat offline, engineer prompts, summarize documents, draft emails, analyze photos, and care for plants.

Cloak AI is your private, on-device AI assistant for iPhone and iPad, designed to help you chat, engineer prompts, summarize documents, write, and analyze with fast, local intelligence.

With Cloak AI, artificial intelligence processing runs directly on your device hardware. Once a model is downloaded, you can optimize prompts, draft emails, summarize articles, polish notes, analyze photos, and care for plants without needing an active internet connection.

WHY ON-DEVICE AI MATTERS

Most AI apps transmit your personal messages, confidential notes, private drafts, and photos to external cloud servers. Cloak AI executes open-weights AI models directly on your device hardware with native Apple Metal GPU acceleration. Your conversations, prompts, drafts, and photos stay stored locally on your device.

KEY FEATURES

1. Prompt Lab Transform simple ideas into structured, high-performing AI prompts engineered for ChatGPT, Claude, Gemini, DeepSeek, Cloak AI, and Universal AI. Features intelligent intent detection, customizable tone and output formatting presets, target audience tailoring, automatic placeholder variable extraction, prompt rationale explanations ("Why is this better?"), and a personal saved prompts library.

2. Private AI Chat Converse naturally with on-device AI models. Brainstorm ideas, draft content, ask questions, and solve problems with fast, streaming responses and zero cloud tracking.

3. Text and Document Summarizer Condense articles, reading notes, and long documents into clear takeaways with 3 selectable length presets: Brief key points, Balanced overview, or Detailed summary.

4. AI Email Writer Draft articulate, well-structured emails and smart replies in seconds with 7 tone presets (Professional, Friendly, Formal, Casual, Persuasive, Concise, Warm) and automatic subject line generation.

5. Text Rewriter and Grammar Polisher Refine your text with 5 rewrite styles: Formal, Casual, Concise, Creative, and Fix Grammar. Improve clarity, vocabulary, and tone while keeping your original meaning intact.

6. Social Media Post Creator Craft engaging posts and captions tailored for Instagram, Facebook, X, LinkedIn, and TikTok using Professional, Casual, Humorous, or Inspirational tones with automatic hashtag suggestions.

7. Plant Care and Health Guide Identify common houseplants, assess visible leaf symptoms such as yellowing or spotting, view step-by-step care recovery suggestions, and check pet safety information completely offline.

8. Visual Image Analysis Analyze photos and describe scenes directly on device using local vision models without uploading your images to external servers.

9. Dynamic Model Library & Apple Metal GPU Acceleration Download, switch, and manage leading open-weights models (Gemma 2, Llama 3.2, Qwen 2.5, SmolLM2, Phi-3.5-mini) with native Metal GPU acceleration, task capability badges ("Best Suited For"), full storage transparency, and secure Apple Keychain authentication for gated models.

PRIVACY & ON-DEVICE SECURITY

• 100% on-device AI processing on Apple Silicon hardware.
• Chat history, prompts, drafts, and notes remain stored locally.
• Gated model tokens are secured directly in Apple's encrypted iOS Keychain.
• No account registration or sign-in required.
• No cloud subscriptions or hidden usage fees.

DEVICE REQUIREMENTS

• Compatible with iPhone and iPad running iOS 17.0 or later.
• Hardware-accelerated with Apple Metal GPU for low-latency local inference.