SafeThink - Private AI

The AI assistant that never sends your data anywhere. 100% on-device, zero data collection.

SafeThink is the AI assistant that never sends your data anywhere. It works without the internet. It runs the Qwen 3.5 4B large language model entirely on your iPhone - no cloud APIs, no accounts, no subscriptions. Your conversations, documents, and photos stay on your device, always.

POWERFUL ON-DEVICE AI • Run a 4-billion parameter AI model directly on your iPhone • Streaming responses with real-time tokens-per-second display • 8K context window for longer, more coherent conversations • No internet required for AI chat - works completely offline

DOCUMENT ANALYSIS • Import PDF, TXT, or CSV files and ask questions about them • The AI reads your document content and provides summaries, answers, and insights • All document processing happens on-device - your files are never uploaded

IMAGE UNDERSTANDING • Attach photos and ask the AI about them • On-device Vision AI extracts text (OCR), identifies objects, detects faces, and reads barcodes/QR codes • The AI uses this analysis to describe and answer questions about your images

WEB SEARCH • Optional DuckDuckGo web search for up-to-date information • Search results are processed by your on-device AI for intelligent answers • Every network request is logged and visible in the Privacy Dashboard

PRIVACY BY DESIGN • Zero data collection - no analytics, no tracking, no crash reporting • No account required - just download and start chatting • Face ID / Touch ID lock to protect your conversations • Privacy Dashboard shows every network request the app has ever made • Network access is only used for downloading the AI model and optional web search

SMART FEATURES • Persistent memory - the AI remembers important facts across conversations • Voice input with on-device speech recognition • Markdown rendering with code syntax highlighting • Pin, archive, and search your conversation history • Export chats as JSON, Markdown, TXT, or PDF • Customizable system prompt, temperature, and top-p settings

REQUIREMENTS • iPhone 12 Pro or later (6 GB RAM minimum) • iOS 17 or later • ~3 GB free storage for the AI model download • Internet required only for initial model download

SafeThink proves that powerful AI doesn’t have to come at the cost of your privacy. Everything runs on Apple Silicon - your data never leaves your hands.