Reviewers describe Alter as a Mac AI tool they use constantly because it fits directly into daily work instead of sending them back to browser tabs and chat windows. The most repeated praise is for strong context awareness across apps and on-screen content, fast access to many current models, customizable actions and shortcuts, and workflow features like dictation, smart pasting, meeting transcription and summaries, file handling, and privacy-friendly local options. Users also highlight frequent updates and responsive founders, though one reviewer wants a better chat interface and easier history access.