Johan van Rooyen

Developer Tools, Productivity, Security.

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About

Dedicated to building specialized practical software and mobile applications.

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Tastemaker

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Maker History

GUARDIAN2.0Silent mobile safety app with instant WhatsApp contact alert
Aug 2026

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Joined Product HuntAugust 15th, 2026

Forums

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11d ago

Hey Product Hunt! Founder building personal safety & IoT security tech in South Africa

Hey everyone! I'm an indie developer based in South Africa building GUARDIAN 2.0.

I got tired of legacy safety tools relying on slow, expensive SMS notifications, so I re-architected my platform to run real-time crash telemetry straight through WhatsApp while bridging directly into physical home alarm hardware (like Olarm, Paradox, and IDS).

Really glad to join the PH community! Excited to connect with other makers working on IoT, mobile sensors, and developer-led projects. What are you all currently building?

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1mo ago

GUARDIAN2.0 - Silent mobile safety app with instant WhatsApp contact alert

GUARDIAN 2.0 is a mobile safety application hosted at guardian2.web.app that utilizes Firebase and a contact backup framework to execute completely silently without visible or auditory indicators, integrating WhatsApp for user communication.