Prompta is an open-source UI client tool that allows users to have conversations with ChatGPT (and GPT-4) models. Users can store all their chat conversations locally and easily search through them. The tool also offers cross-device synchronization, allowing users to access their chat history on multiple devices. A unique feature is the ability to bring your own API key and the tool is keyboard-focused. Users can launch it in their browser or download it from GitHub. Prompta is developed by Ian Sinnott. Potential applications of this tool could include chatbots, customer support, virtual assistants, and any other scenario that requires interactive conversations with AI models.