Lekh AI

Product Introduction

1. Definition: Lekh AI is a native iOS, iPadOS, and macOS application functioning as a 100% on-device AI assistant. It falls into the technical category of edge AI software, processing all AI tasks locally on the user's iPhone, iPad, or Mac without requiring internet connectivity or cloud servers.
2. Core Value Proposition: Lekh AI exists to provide powerful, private AI capabilities directly on Apple devices, eliminating data privacy risks, subscription fees, and cloud dependency. Its primary value is delivering offline AI chat, vision, document analysis, image generation, and voice interaction with zero data transmission to external servers.

Main Features

1. On-Device AI Chat:
   • How it works: Utilizes quantized and optimized versions of state-of-the-art large language models (LLMs) like Gemma 3 QAT (1B-4B), Qwen 2.5/3 (1B-4B), Llama 3.2 (1B-3B), and OpenELM (270M) running entirely on the device's Neural Engine and CPU/GPU. Supports document attachment (PDF, images) for analysis using integrated vision models. Conversations can be exported as PDF, text, or markdown.
2. Persistent AI Memory:
   • How it works: Implements a local vector database or similar on-device storage mechanism. The AI retains user-provided context (name, preferences, facts) across different chat sessions. Users can query stored information (e.g., "What's my favorite...?") and have full control to enable/disable or clear this memory via the app settings.
3. Siri & Shortcuts Integration:
   • How it works: Leverages Apple's SiriKit and Shortcuts app frameworks. Enables hands-free voice commands like "Hey Siri, Ask Lekh AI" or "Hey Siri, Generate image with Lekh AI". Supports custom Shortcuts workflows and continuous conversation mode for natural interaction.
4. Local AI Image Generation:
   • How it works: Runs Stable Diffusion derivatives (SD 1.5, SDXL) and specialized Lekh AI models (Photo Realism, Interstellar, etc.) using Core ML or Metal Performance Shaders. Includes style presets and 4x AI upscaling via the RealESRGAN neural network executed on-device. All image creation and enhancement happen locally.
5. Local AI Server (REST API):
   • How it works: Turns the iPhone into a local HTTP server accessible via REST API over the user's WiFi network. Compatible with Python, curl, or any HTTP client. Provides private API access to the on-device AI models (chat, vision, image gen) without data leaving the local network.
6. Natural Voice Chat (TTS):
   • How it works: Employs neural text-to-speech (TTS) engines, including Kokoro, running locally. Enables hands-free conversational mode where users speak naturally and receive high-quality, synthesized voice responses directly on the device.
7. Vision Features (On-Device):
   • How it works: Uses on-device computer vision models for real-time camera analysis, scene description, optical character recognition (OCR) for text extraction from documents/signs/receipts, and image understanding. Processes visual data entirely locally.
8. AI Personas:
   • How it works: Implements custom prompt engineering and potentially fine-tunes base models locally to create 25+ distinct AI personas (wizards, pirates, detectives) with unique personalities, speaking styles, and personalized welcome messages, all operating within the on-device environment.

Problems Solved

1. Pain Point: Data Privacy Concerns in AI. Lekh AI directly addresses the risk of sensitive user data (conversations, documents, images) being sent to and stored on cloud servers by processing everything 100% on-device.
2. Target Audience:
   • Privacy-Conscious Professionals: Lawyers, healthcare workers, journalists, financial advisors handling confidential data.
   • Offline Users: Travelers, remote workers, individuals in areas with poor/unreliable internet.
   • Tech Enthusiasts & Developers: Users interested in edge AI capabilities, wanting to experiment with local LLMs/Image Gen, or utilize the local REST API.
   • Cost-Sensitive Users: Individuals avoiding recurring AI subscription fees.
3. Use Cases:
   • Analyzing confidential legal/medical PDFs offline without uploading.
   • Brainstorming or coding assistance during flights or commutes without internet.
   • Generating private creative content (images, stories) without cloud dependencies.
   • Using Siri voice commands for hands-free AI help while driving or cooking.
   • Setting up a private AI API endpoint on a local network for custom apps.

Unique Advantages

1. Differentiation: Unlike cloud-based AI assistants (ChatGPT, Claude, Gemini) or other apps using cloud APIs, Lekh AI requires no internet connection, has no subscription fees (one-time $2 payment), and guarantees zero data transmission off the device. It consolidates multiple AI modalities (text, vision, image, voice) into a single, fully offline native app.
2. Key Innovation: The core innovation is the comprehensive integration of advanced, quantized AI models (LLMs, Diffusion, TTS, Vision) capable of running efficiently on mobile hardware (A15 Bionic chip or later) using Apple's Core ML and Neural Engine frameworks, combined with unique features like the local REST API server and persistent on-device memory.

Frequently Asked Questions (FAQ)

1. Does Lekh AI require an internet connection?
   No, Lekh AI is a 100% offline AI app. All processing, including AI chat, image generation, vision analysis, and voice chat, occurs entirely on your iPhone, iPad, or Mac after the initial model download. No internet is needed for core functionality.
2. What Apple devices are compatible with Lekh AI?
   Lekh AI requires iOS 18, iPadOS 18, macOS Sequoia, or visionOS 2.0. An iPhone 13 or newer (6GB+ RAM) is recommended for optimal performance. iPhone 15 Pro/16 Pro or iPad Pro is best for running the largest models like SDXL or 4B parameter LLMs.
3. How much storage do Lekh AI models need?
   On-device AI models require significant storage. Individual models range from 5GB to 15GB depending on size and type (e.g., large LLMs or SDXL). Users can selectively download only the models they need to manage storage. The app itself is 2.8GB.
4. How does Lekh AI ensure my privacy?
   Privacy is ensured through 100% on-device processing – no data (chats, images, documents, voice) ever leaves your device. Additional features include Face ID/Touch ID app lock, encrypted iCloud sync (optional for conversation history), no accounts, no tracking, and no data collection as verified in its App Privacy report.
5. Can I use Lekh AI with Siri?
   Yes, Lekh AI integrates deeply with Siri. Use voice commands like "Hey Siri, Ask Lekh AI" for chat or "Hey Siri, Generate image with Lekh AI" for image creation. You can also build custom Shortcuts incorporating Lekh AI actions and enable continuous conversation mode.