Quick answer
CodexBar is a menu bar meter for macOS and Linux that shows live limits for about 110 providers. UsageAtlas is a desktop dashboard for Windows, macOS, and Linux that pairs live limits with months of local history. Pick CodexBar for breadth on a Mac, UsageAtlas for history or Windows.
At a glance
| CodexBar | UsageAtlas | |
|---|---|---|
| Platforms | macOS 14+, Linux | Windows, macOS, Linux |
| Providers | About 110 | 14 |
| Main view | Menu bar meter | Dashboard window plus tray or menu bar |
| History | Cost scans for Codex and Claude | 7, 30, or 90 days by project, session, model, and tool |
| Alerts | Yes | One per window per reset |
| Public profile, Wrapped, README cards | No | Optional and free |
| License | MIT | MIT |
When CodexBar is the better pick
You work on a Mac, you want a meter rather than a window, and you use providers UsageAtlas does not read. CodexBar's coverage is the widest of any free tracker we know of. It also has a Qt 6 app and a CLI for Linux.
When UsageAtlas is the better pick
You need Windows, which CodexBar does not ship for. Or you want history that outlives Claude Code's 30-day cleanup, a breakdown by project, or an optional public profile. See CodexBar on Windows if that is why you are looking.
Questions, answered
Is CodexBar free?
Yes. CodexBar is free and MIT licensed.
Does CodexBar run on Linux?
Yes. Besides the macOS menu bar app, it ships a Linux app built on Qt 6 and a CLI.
Does CodexBar keep usage history?
It scans local logs for Codex and Claude cost. UsageAtlas keeps daily history for all its tools and seals finished days, so they survive Claude Code's 30-day cleanup.