DraftKey is a private, on-device AI writing assistant for Mac that runs entirely on Apple Silicon without sending text to the cloud. It offers Tab-triggered autocomplete and keyboard-shortcut-driven rewrites across compatible Mac apps. Users can adjust tone, shorten, clarify, or fix grammar through a lightweight writing tools panel. A one-time payment of $4.99 covers up to three Macs with no subscription required. The license also includes clipboard history and mechanical keyboard sounds.