3sparks Chat allows you to connect with local models like LM Studio and Ollama on Mac, PC, or Linux, as well as cloud-based APIs like OpenAI and Mistral. It features an AI Keyboard Extension allowing you to refine messages instantly over iMessage, WhatsApp, and other apps. The platform emphasizes customizable keyboard prompts, personalized AI chat instructions, and full data control without forced cloud dependency, thereby providing a seamless and integrated experience across all your Apple devices.