Focus Mode & Hard Lock for Coding Interview Prep
PrepOS Pomodoro-style focus sessions tied to LeetCode or any prep app — optional Hard lock blocks Cmd+Q until the timer ends.
Generic Pomodoro apps do not know you are in LeetCode versus YouTube. PrepOS starts a focus session on the active prep window — LeetCode, Playground, Notes — and tracks time per app.
Hard focus vs soft focus
- Soft: timer runs, you can quit PrepOS normally.
- Hard: Cmd+Q (and related quit shortcuts) blocked until the session completes — for deadline weeks.
Lockdown mode for finals week
When you need zero escape hatches, lockdown mode pairs with focus. Useful the night before an onsite or campus OA — not every day, but there when discipline matters more than comfort.
Why this beats a browser extension
Extensions block sites; they do not stop you from opening a new profile or your phone. A desktop shell with hard lock makes the friction real enough that you finish the block you planned.