OhNine App Tracks Claude AI Usage Limits in Real Time from Your Menu Bar

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A developer built OhNine, a free menu bar app, to solve the problem of Claude AI sessions ending abruptly without warning. The app monitors Claude's layered usage limits — including session, weekly, and model-specific caps — and displays live progress in the menu bar alongside the system clock. Users receive native alerts at 80%, 91%, and 100% usage, giving them time to wrap up before hitting a cutoff. The developer found no existing tool accurately tracked Claude's specific limit structure, which prompted the build. OhNine collects zero telemetry, a design choice the developer says has influenced how they approach all subsequent products.

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