Aion is a native macOS menu bar utility for people who keep too many apps open, and do not want a timer blindly closing the ones that are still working.

Instead of relying only on inactivity time, Aion checks what an app is doing before it quits. It leaves downloads, video and audio playback, calls, recording, and local automation alone, and uses the standard macOS quit flow so unsaved-work prompts can appear. When an app is truly idle, Aion closes it to help reduce clutter, memory pressure, and battery use.

Key features:

- Smart idle detection and automatic quitting

- Protection for active downloads, media, calls, recordings, and local automation

- Per-app keep-open and close rules

- Focus Modes for changing routines

- Activity History for reviewing what happened

- Microphone and camera activity protection

- Installer cleanup and resource insights

- iCloud settings sync across Macs

Aion is built for macOS 14 and later, runs as a lightweight menu bar app, and keeps app monitoring and rule decisions local to the Mac. Aion is free to use with essential auto-quit and rule features; Pro is a one-time purchase that adds unlimited rules, Focus Modes, app variant detection, and iCloud sync.

Designed for busy Macs, creative work, development environments, and anyone who wants a cleaner desktop without risking work that is still in progress.