The private AI app for Android

What the Android app does

Chat with GPT-6, Claude, Gemini, Grok, DeepSeek and more, and switch models in the middle of a conversation. Cited web search, so you can check where an answer came from. Image Studio and file attachments, right from your phone. Voice input, push notifications and home screen widgets. Every chat, project and model choice synced with the web, desktop and iPhone apps. The app is free. A free account includes 100 credits every month, and paid plans add larger models and more credits.

Every leading model, one app

Each lab's own app runs only that lab's models. Quad puts them side by side. Models (Quad: GPT-6, Claude, Gemini, Grok, DeepSeek and more; One lab's own app: That lab's models only). Switch models mid-chat (Quad: Yes, with the context kept; One lab's own app: No). Training on your chats (Quad: Never, on any plan; One lab's own app: Depends on the vendor and your settings). Price to start (Quad: Free, 100 credits a month; One lab's own app: Free tiers vary, paid plans often $20 a month). Leave the picker on Smart and Quad chooses a model for each message, or pick one yourself. A quick question can go to a fast model and a hard one to the strongest, without paying for three subscriptions. Quad gives you the models, not each vendor's own app features.

More than chat

Cited web search, so you can check where every answer came from. AI images in Image Studio, and AI video on the Ultra plan. Documents, slides, sheets, forms and diagrams you edit together with Quad beside the chat, then download as Word, PowerPoint or PDF. Projects that keep files, chats and instructions together for one piece of work. Chat with your PDFs, Word files and spreadsheets on models that read them. Everything you make on your phone is waiting on your computer and the web.

Your phone and your computer, together

Start a chat on your phone and finish it on your laptop, or the other way round. Everything syncs. With Quad Link on your computer, you can start agent work from your phone and approve it when it asks, while the work runs on the computer you paired. Documents, slides and images you make in Quad are in your library on every device. Get the desktop app for Mac or Linux, or use Quad in any browser at quad.chat.

Private on every device

Quad never uses your chats or files to train AI models, on any plan, free included. There is no setting to find. Quad never sells your data and never shares workspace content with advertisers. On the Private Lane, chats go only to model providers under a Zero Data Retention agreement, so the provider keeps nothing after it answers. Models without a ZDR route ask you to confirm first. Chats and files are encrypted in transit and at rest, and you can export or delete them yourself at any time. Incognito chats stay out of your history, and their temporary data is deleted from Quad's servers within an hour. The details, and where privacy stops, are on the private AI chat page and the zero data retention page.

Frequently asked questions

Is there one Android app for ChatGPT, Claude and Gemini?

Yes. Quad for Android runs GPT-6, Claude, Gemini, Grok, DeepSeek and more in one app. Quad gives you the models, not each vendor's own app features.

Is the Android app free?

Yes. The app is free on Google Play and a free account includes 100 credits every month.

Do my chats sync with my computer?

Yes. Chats, projects and settings sync with the web, desktop and iPhone apps.

Does Quad train on my chats from the Android app?

No. Quad never uses your chats or files to train AI models, on any plan, and never sells your data.