GrammarBot is an AI-powered tool designed to assist with spelling and grammar correction in English. This AI tool is unique as it performs its functions without relying on internet connections or subscriptions, unlike many other similar applications. To use GrammarBot, you need to first download the AI model, set up your choice of hotkey, then proceed to polishing your written English. Primarily targeted at MacOS users with M1/M2/M3 chips, GrammarBot is especially useful before sending an email, making LinkedIn posts and text messaging. The AI operates with a local LLM (large language model) which understands and creates natural language, functioning akin to a personal ChatGPT on your laptop. After downloading the AI model, internet is no longer a necessity for it to work, offering users comfort in the privacy of their data as no typed or checked text leaves their device. It's a user-friendly tool that prides itself on lifetime usage after a one-off purchase. Notable features include 1-year updates and email support availability.