Atomic Chat — Local AI Chat

ATOMICMAIL SYSTEMS

About this app

Atomic Chat is a private AI assistant that runs entirely on your Android device. No accounts, no sign-ups, no cloud servers. Every conversation stays on your phone.

WHY ATOMIC CHAT
- 100% on-device AI — models run locally on your device
- Complete privacy — your chats never leave your phone
- Works offline — no internet required after initial model download
- No account needed — open the app and start chatting
- Open source models — choose from leading open-weight LLMs

WHAT YOU CAN DO
- Ask questions and get instant answers
- Brainstorm ideas and get creative suggestions
- Draft emails, messages, and documents
- Summarize text and extract key points
- Translate between languages
- Get help with writing, coding, and learning
- Have natural, flowing conversations on any topic

CHOOSE YOUR MODEL
Pick from a curated selection of open-source language models optimized for mobile. Download once, use forever. Swap models anytime based on your needs — smaller models for speed, larger models for depth and quality.

BUILT FOR PRIVACY
Atomic Chat processes everything locally on your device. Your prompts, your conversations, and your data never touch a server. No telemetry, no analytics tracking your conversations, no third-party AI providers, no data sharing.

OPTIMIZED FOR MODERN ANDROID
Atomic Chat is built to take full advantage of modern Android hardware, delivering fast response times and efficient battery usage. Best experience on devices with 6GB+ RAM.

PERFECT FOR
- Privacy-conscious users who don't want their conversations in the cloud
- Developers and AI enthusiasts exploring local LLMs
- Travelers and commuters who need AI without internet
- Professionals handling sensitive information
- Anyone curious about running AI on their own device

WHAT MAKES IT DIFFERENT
Unlike cloud-based AI assistants, Atomic Chat doesn't send your prompts to OpenAI, Google, or any other server. There is no account to create, no subscription required for local models, and no risk of your conversations being used to train someone else's AI. The model runs on your phone. The conversation stays on your phone. Period.

Atomic Chat puts the power of modern AI in your pocket — without the compromises of cloud services. Download, pick a model, and start chatting. Your data is yours.

—

Note: Larger AI models require significant device storage (1-4GB per model) and work best on phones with 6GB+ RAM. Initial model download requires internet; everything after works offline.

Ratings and reviews

Solid, but LFM 2.5 vision just froze for me and didn't work, and I cannot adjust context length still. Supports search now, so it's probably the best out of any local model app on phones, but the accuracy of said search is quite mixed maybe due to context length(?), and of course a model that runs on your phone is always going to be super limited until somehow RAM crisis goes away and somehow phones get on par with today's gaming PCs maybe

Not enough granular control of the inference settings like temperature and repetition penalty. Some models are totally unusable as they just loop endlessly about nonsense. Not a fan of locked model selection either. Curated models are fine, but the ability to load other models is needed. The UI is nice, clean, and very responsive. Could be a good app with further development.

Add support to connect to desktop app, running LLM on desktop and access it through the android app on the same network. Also the download feature usually bugs and you have to download the model again. Edit: Thanks for the response. Now the app supports cloud (Localhost & proprietary models) & local models, Also web search, which is Fantastic! But there is still no support for image or file upload, If you could add those, I will change to 5 Stars immediately!

What’s new

Push notifications when a model finishes downloading or a chat replies while you’re away from the app