100% bring-your-own-key · no servers · available worldwide

Your keys. Your chats. Your device. Nothing in between.

BlackUI: BYOK Lite is a multi-AI dashboard that talks directly to Gemini, and to Claude if you add a key, then lets you turn code into a signed APK/AAB through your own GitHub account. There is no sign-in, no backend and no proxy: we provide no AI keys and we never see your data.

What it does

A plain-language look at each feature and where your data goes.

Your own keys

Gemini for chat; optional Claude and GitHub. Sent straight from your device to the provider.

Multi-AI chat

Gemini for everyday conversation and media, Claude for code — auto-switched or set manually.

Debug attached files

Attach a file or paste an error and get a fix in the chat.

File tools

Convert, merge and generate PDFs, documents, images and audio on your device.

APK / AAB builder

Build a signed app through your own GitHub Actions from an open template.

No accounts, no servers

Nothing to sign up for and nothing sent to us.

Where your data goes

Short and honest.

Chats, files, settings and keys stay in the app on your device. When you send a message, it goes directly to the provider whose key you entered (Google Gemini, Anthropic Claude, or GitHub for builds). The Advance Features unlock is a one-time Amazon in-app purchase handled entirely by Amazon. Read the Privacy Policy and Terms of Service.

Claude and the APK/AAB builder are Beta. They depend on external APIs we do not control. The builder uses our open template at github.com/thoibatrader-ship-it/apk-template-lite.

Frequently asked questions

Quick answers to what people ask most.

Do I need my own API key?

Yes. BlackUI: BYOK Lite is 100% bring-your-own-key. We do not provide any AI keys. You add your own Google Gemini key to chat, and optionally your own Claude key and GitHub token for the Advance Features. Keys are stored on your device and sent directly to the provider.

Do you have servers, accounts or a login?

No. There is no sign-in, no backend, no proxy and no analytics. Your device talks directly to Google, Anthropic and GitHub with your keys.

Where are my chats stored? Can they be recovered?

Only on your device, in the app’s local storage. If you clear the app’s data, uninstall it or delete a chat, it is gone for good. We have no copy.

How does payment work?

The Advance Features unlock is a single one-time in-app purchase through the Amazon Appstore. Amazon handles payment and refunds; we never see your payment details. There is no subscription.

Is it available outside India?

We do not restrict the app by country. Availability depends on Gemini, Claude, GitHub and the Amazon Appstore in your region.

Is my signing password safe?

The keystore is generated on your device. The password and keystore go only to your own private GitHub repository as encrypted secrets, and are never sent to us. We cannot recover them, so back them up.

Can I use what the AI generates commercially?

We place no restriction on AI output, but the AI provider’s terms apply. The app’s own logo, images and source code are not licensed for reuse.