If you're looking for a secure ChatGPT client that syncs prompts across multiple devices, ChatTab is an excellent choice. This native macOS desktop app integrates with OpenAI's ChatGPT API and supports multiple models like GPT3.5, GPT4, and Claude2. It features iCloud sync, ensuring your prompts are synced across all your devices, and securely stores your API key using Apple's keychain. The app is privacy-friendly, with no data storage or tracking logs, and offers various pricing plans including a free starter plan.
Another option to consider is QuickyAI, an extension that turns any webpage into a ChatGPT interface. This tool allows you to chat with any webpage directly without leaving your browser, and supports GPT-4 and GPT-4 32k models. QuickyAI requires a user-provided OpenAI API key, which is stored locally in the browser for secure data handling. It offers a convenient way to boost productivity by making ChatGPT accessible for tasks like answering emails and rewriting paragraphs.