Caret is an AI that sees what is on your screen and offers tab-to-complete writing across apps on Mac.

FAQ
Caret is a macOS-wide AI completion assistant that uses on-screen context to finish thoughts in messages, email, docs, and collaboration tools. It brings tab-to-complete writing across apps without switching to a separate chat window. Core capabilities include: On-screen context understanding for completions, Tab-to-complete in any Mac app, Keeps personal writing voice and tone.
Common scenarios include: Fast instant-message replies, High-frequency email and document writing, Unified completion across multi-app workflows.