Huy Vu

I build apps for problems I cause myself

About

Software engineer in the Bay Area. I build small Mac apps for problems I caused myself — usually some bad habit I couldn't fix with willpower, so I made software that doesn't give me the choice. First one out: Hydration Hostage — it locks your screen until the camera sees you actually drink water. Building more in the same spirit: tools with one strong opinion that just make you do the thing.

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Maker History

Hydration HostageYour screen stays locked until you actually drink water
Jun 2026

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Joined Product HuntJune 17th, 2026

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10h ago

Hydration Hostage - Your screen stays locked until you actually drink water

Reminders are easy to ignore. Dismissing a notification costs nothing. So Hydration Hostage doesn't remind. It locks your Mac on a schedule and only unlocks when the camera (100% on-device, nothing uploaded) sees you actually take a sip. Three escalating modes depending how much you trust yourself. One-time purchase, no subscription. The first of a series of apps that make you do the thing instead of nagging you to. Reminders ask. Hydration Hostage enforces.