Ethereal Engine: Local AI Chat

Ramzy Abushaaban

About this app

Ethereal Engine turns your phone into a private AI assistant — a full AI chatbot that runs 100% offline. Download a free AI model once, then chat with no internet, no cloud, no account, and no limits.

Your conversations never leave your device. Ever.

⚡ TRUE ON-DEVICE AI
All AI processing happens locally using llama.cpp, a high-performance inference engine optimized for mobile. Works in airplane mode — your private AI chat is always available, even with zero signal.

🖼️ AI THAT CAN SEE — NEW
Send photos or snap a picture with the camera and let vision AI models describe, explain, or answer questions about what they see — all offline.

📷 SCAN & TRANSLATE TEXT — NEW
Point your camera at any text to extract it instantly (OCR), then summarize or translate it with AI. Supports Latin, Chinese, Japanese, Korean, and Devanagari scripts.

📄 CHAT WITH YOUR DOCUMENTS — NEW
Attach PDFs, text files, code, CSV, JSON, or markdown and ask questions about them. Your files stay on your phone.

🛠️ STUDIO: BUILD MINI APPS — NEW
Describe an app and watch the AI build it — calculators, trackers, little games — then pin them to your home screen. All generated offline.

🚀 ASK ETHEREAL ANYWHERE — NEW
Select text in any app and send it straight to your AI through Android's share menu — summarize articles, explain code, rewrite messages.

📥 FREE OPEN-SOURCE AI MODELS
Browse a curated selection of mobile-optimized GGUF models from Hugging Face — Gemma, Qwen, Llama, Mistral, DeepSeek, and more — or search the full catalog. From lightweight 1B models to powerful 10B models, pick the size that fits your phone's RAM and storage.

💬 FULL-FEATURED CHAT
• Multiple conversations with persistent history
• Per-chat model selection, settings, and system prompts (personas)
• Thinking mode for step-by-step reasoning
• Markdown rendering with syntax-highlighted code blocks
• Smart defaults tune each model family automatically
• Turbo decoding for faster responses

⚙️ BUILT FOR PERFORMANCE
• ARM-optimized inference for fast generation on modern phones
• Smart CPU core detection for the best speed/battery balance
• Downloads resume automatically and continue in the background

🌍 10 LANGUAGES
English, Arabic, Spanish, French, German, Chinese, Japanese, Korean, Portuguese, and Hindi.

🔒 PRIVACY BY DESIGN
• Zero data collection — no analytics, no tracking, no ads
• No account or sign-up required
• No internet needed after downloading a model
• Chats stored locally, protected by Android encryption

Whether you need a private AI assistant, an offline AI translator for travel, a local LLM playground, or an AI that reads documents and photos without uploading them anywhere — Ethereal Engine is your AI, on your phone, working for you alone.

What’s new

What's new in 2.0.2
• The app is now fully translated into 9 languages (Spanish, French, German, Arabic, Chinese, Japanese, Korean, Portuguese, Hindi) — including Studio, Camera Lens, document attachments, and sharing.
• Fixed a crash when scanning text with the camera or from the gallery.
• Fixed a crash when opening a model's details page on devices without a browser.