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k_Tc
212mo ago
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I built an offline-first, privacy-focused Blood Pressure tracker
by 1derfool·Feb 26, 2026·2 points·1 comment
AI Analysis
●●SolidSolve My ProblemNiche Gem
Privacy-focused BP tracker without cloud—competes directly with MyFitnessPal Health and Withings Connect.
Strengths
- •Genuinely offline-first architecture with encrypted local storage and no account requirement
- •Clinical features like morning surge detection and family profiles go beyond typical consumer health apps
- •PDF reports and CSV export give real utility for doctor visits
Weaknesses
- •Crowded category: dozens of health tracking apps exist (Apple Health, Fitbit, Samsung Health integrations)
- •Arbitrary $3.99 price in a market where most alternatives are free or subscription-based
Category
Target Audience
Healthcare users, privacy-conscious individuals tracking blood pressure or managing hypertension.
Similar To
MyFitnessPal Health · Withings Connect · Fitbit app
Post Description
Hi HN,
I built a Blood Pressure tracker because I was tired of the existing apps requiring cloud accounts, subscriptions, or selling health data to advertisers.
BP Tracker Pro is a "Class I Data Logger" built with Capacitor and Vanilla JS. It runs 100% offline on your device.
Key Features: - Gorgeous panel to visually track your blood pressure readings - Zero Cloud Sync: Data lives in a local JSON store (encrypted at rest by Android OS). You can bacjup - PDF Reports: Generates clinical reports for doctors using jsPDF (client-side). - Morning Surge Detection: Analyzes AM vs PM readings to flag stroke risks. - Family Mode: Track multiple profiles (e.g., aging parents) from one dashboard.
Tech Stack: - Vanilla JS + Vite (No React/Vue overhead) - Capacitor v8 (Bridge to Native) - Chart.js for trends
https://play.google.com/store/apps/details?id=com.bloodpress...
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