App Store
Version 1.2 · 2026-02-01
Latest Updates and Security Patches
Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Not yet tested.
The store currently lists version 1.2, updated 2026-02-01.



Store screenshots supplied by the developer.
First Responder is a heart rate and oxygen (SpO2) monitoring app for Apple Watch. It provides real-time monitoring of heart rate and oxygen saturation on one screen without sharing, tracking, or saving any personal data. The app is designed to prioritize user privacy, allowing it to be used on different users' devices without affecting personal health data.
Key features include:
Real-time heart rate and oxygen monitoring.
No data tracking, saving, or sharing of any kind.
Simple and quick to use: No configuration required.
30% of net profit goes to the UK Air Ambulance charity.
The app is fast to load and optimized for user convenience, with a simple one-time purchase and no subscriptions. If you need any test accounts or additional details, please feel free to reach out.Now with data streaming from Watch to Phone for remote monitoring(within bluetooth range)…
From the developer’s store description.
For developers and the curious
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No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.
Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
Not yet tested. No analysis has been run for this app, so there is no version or date to report.
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Latest Updates and Security Patches
heart-rate-oxygen-monitor-proWhat the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
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