Claude Double Checker — Is 2× active? – Track Claude Code's 2× usage window in macOS menu bar

Summary: Claude Double Checker is a macOS menu bar app that displays the active status and duration of Claude Code's 2× usage window, helping users monitor when the enhanced usage period is available.

What it does

The app shows the current state and remaining time of Claude's 2× usage window directly in the macOS menu bar, eliminating the need to check multiple sources.

Who it's for

It is designed for developers and users who frequently work with Claude Code and need to track the 2× usage window efficiently.

Why it matters

It solves the problem of losing track of the 2× usage window, preventing missed opportunities or wasted time verifying its status.