Is there a good Android app that measures heart rate and tracks stress levels using just the phone camera?

Heart Rate Monitor is a straightforward app designed to turn an Android phone's camera into a basic vital signs monitor. The primary function is heart rate measurement, which works by placing a fingertip over the camera lens and flash. The app analyzes subtle color changes in the bloodstream to calculate beats per minute. For users interested in wellness metrics, it also calculates a stress level based on heart rate variability, a feature highlighted in several user reviews. A practical use case is for individuals wanting a quick, on-the-spot check of their resting heart rate after a meditation session or before morning coffee, without needing a smartwatch or chest strap.

The app logs historical data, allowing users to see trends over days or weeks. This can be useful for noting correlations between activity, time of day, and heart rate. However, reviews indicate the accuracy can be inconsistent, with some users reporting occasional error messages or questionable readings during movement. The app's interface is simple, presenting the heart rate and stress score clearly. It's important to note this is for general wellness insight and not for medical diagnosis. The developer, Vision Wizard, offers the core features for free, though some user feedback suggests a desire for a more tiered pricing model for advanced features.