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Cardiogram
Welltory
Heart Analyzer
Instant Heart Rate
RscMe
Heart for Heart
Heart Rate
Apple Watch heart rate alerts the moment you go above or below the BPM thresholds you set. Background Mode, iPhone Critical Alerts, and Alert Sharing with trusted contacts.

Website, pricing, platforms and company facts side by side.
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| Website | diffee.me | beatwatcher.app |
| Pricing | — | |
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| Company | — | Startup from the United States · 1 - 9 employees · 2020 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Diffee yet.
Beat Watcher is designed to do one thing well: alert you when your heart rate goes above or below the BPM thresholds you set. Choose a high threshold, a low threshold, or both with the Digital Crown, and Beat Watcher taps your wrist and plays a sound the moment your heart rate crosses it....
What each product offers, as listed by its team.


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As answered by people managing Diffee and BeatWatcher.app.
BeatWatcher.app's answer:
Beat Watcher is built around alerts, not charts. You choose a high and a low heart rate threshold, and Apple Watch taps your wrist and plays a sound the moment a reading crosses one. Background Mode keeps monitoring when your wrist is down, and alerts can also reach your iPhone as Critical Alerts or go to trusted contacts through Alert Sharing.
BeatWatcher.app's answer:
People who want to notice right away when their heart rate is higher or lower than they expect: during stress, workouts, sauna, sleep and recovery. Many people in the POTS, ME/CFS and Long Covid communities use it for heart rate awareness and pacing. Family members and caregivers can receive alerts through Alert Sharing.
BeatWatcher.app's answer:
If you want to know about a high or low heart rate when it happens, not later in a chart, Beat Watcher is designed for exactly that. You set the thresholds, monitoring and alerts run on Apple Watch itself, and the people you trust can receive your alerts for free.
BeatWatcher.app's answer:
I’m John Ganotis. I build apps on my own, and Beat Watcher is one I use every day. The idea came in 2020, while I was reading James Nestor’s book Breath: I wanted a way to notice in the moment when I was getting stressed, instead of reading a chart afterward. Apple Watch had the sensor; what I wanted was an alarm I could set.
Beat Watcher launched in December 2020 as exactly that: set a high or low BPM threshold with the Digital Crown, and Apple Watch taps and sounds when your heart rate crosses it. Since then the app has grown where people asked it to. Background Mode keeps watching when your wrist is down. The optional iPhone companion can deliver alerts as Critical Alerts, so they come through on silent or Do Not Disturb. Alert Sharing lets people you trust receive your alerts on their own phones, free. Beat Watcher also works with chest straps like the Polar H10.
Beat Watcher is a general wellness app, not a medical device, and I try to describe it that way everywhere. For medical decisions, people should talk to their care teams. I still answer every support email myself.
BeatWatcher.app's answer:
Swift and SwiftUI, with Apple’s HealthKit on Apple Watch and iPhone.
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