---
title: "Discussion on \"I Built a Crisis-Detection Engine That Never Phones Home\" | Hashnode"
description: "Discussion on \"I Built a Crisis-Detection Engine That Never Phones Home\". Pain Tracker detects crises using only your device—never sends data, never spies. 100 % local, encrypted, open-source. Real code inside."
url: "https://hashnode.com/posts/i-built-a-crisis-detection-engine-that-never-phones-home/692a88d78ccd14ae95773ee7"
---

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# [I Built a Crisis-Detection Engine That Never Phones Home](https://blog.paintracker.ca/i-built-a-crisis-detection-engine-that-never-phones-home?utm_source=hashnode&utm_medium=feed)

Pain Tracker detects crises using only your device—never sends data, never spies. 100 % local, encrypted, open-source. Real code inside.

Nov 29, 2025 · 8 min read · blog.paintracker.ca  
Updated Jan 15  
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## Written by

[CrisisCore-Systems](https://hashnode.com/@CrisisCoreSystems)

@CrisisCoreSystems · Vernon, BC, Canada

  
[View profile](https://hashnode.com/@CrisisCoreSystems)

Building privacy first health tools that fail safely when users are already under pressure.

I’m the founder of CrisisCore Systems and the developer behind PainTracker.ca, a privacy-first, offline-first pain journal built for people who’ve been failed by “normal” health apps. I build PWAs that run entirely on your device, use real encryption, and respect trauma and crisis instead of exploiting them. Here I write about Web Crypto, IndexedDB, workers’ comp evidence, and building software that still works when life doesn’t.

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