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Life & fun · May 27, 2026

Azora

Breathe with heart rate feedback from just your phone camera

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What it does

Azora is a breathwork app that measures your heart rate using only your phone camera. After each session, you also get deeper heart statistics so you can understand your progress over time and how breathing has affected your heart and stress. Azora uses PPG technology to measure your pulse, with about ±1 to 2 BPM error in ideal conditions.

Does the same job

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  • EB
    Every Breath You Take – Heart Rate Variability Training2023 · github.com · ▲348

    Through controlled breathing it is possible to regulate your body's stress response. I've built an app to measure and train this effect with a Polar H10 Heart Rate monitor. With every breath you take, you can set the pace of your breathing rate, measure your breathing control with the chest accelerometer, and see how heart rate variability responds.

  • Heart Rate2020 · ▲93

    Measure your heart rate with just your phone

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    A weird thing that detects your pulse from the browser videoMar 2026 · pulsefeedback.io · ▲115
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    Hear, see and feel your own heartbeat

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  • DT
    Don't Hold Your Breath – Breathing Analysis with Polar H10 HR Monitor2023 · github.com · ▲51

    A person's heart rate fluctuates based on factors such as activity, environment, and mental state. Additionally, heart rate variations occur on a much shorter timescale, with changes happening every few seconds. During inhalation, heart rate slightly increases, and it decreases again during exhalation, a phenomenon known as respiratory sinus arrhythmia. There are several reasons for this. Firstly, an increase in volume within the thoracic cavity (the space between the ribs) leads to a corresponding drop in pressure, which is counteracted by a rise in heart rate to regulate blood pressure.…

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