Quick answer
Claude Code Usage Monitor is a free Python terminal tool that tracks Claude burn rate from local logs. UsageAtlas is a free desktop app that shows the limits Anthropic reports, keeps history, and adds Codex, Cursor, and 11 more tools. Keep the monitor in a terminal pane if you like it, and use UsageAtlas for the rest.
Side by side
| Claude Code Usage Monitor | UsageAtlas | |
|---|---|---|
| Interface | Terminal UI | Desktop app |
| Install | Python package claude-monitor | Installer for Windows, macOS, Linux |
| Tools | Claude | 14 tools |
| Limit source | Calculated from local logs | Reported for your account, plus local logs |
| History | Current usage | 7, 30, or 90 days |
| License | MIT | MIT |
Why the limit source matters
Claude Code and the Claude apps share one set of limits. A tool that reads only local logs cannot see what you used on claude.ai or another computer. UsageAtlas shows the percentage Anthropic reports for your account, so that usage is included.
Questions, answered
Does Claude Code Usage Monitor work on Windows?
Yes. It is a cross-platform Python tool, so you need Python and a terminal. UsageAtlas installs like any desktop app instead.
Which one is more accurate for limits?
UsageAtlas reads the limit percentage Anthropic reports for your account. Tools that work from local logs have to estimate, and they miss usage from other devices.
Can I see Codex usage too?
Not in Claude Code Usage Monitor. UsageAtlas shows Codex windows and credits next to Claude.