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Description:The only scientifically validated HRV app that does not require an external sensor. HRV4Training helps you to optimize your goals and avoid overtraining by measuring your heart rate variability and providing customized feedback on your physical condition. HRV4 training does not require a heart rate monitor as it can accurately assess your HRV using the phone's camera. Compatible with your phone: The app instantly recognizes if your phone is supported, so you can always get a refund if it does not.
Required Android Versions: Ice Cream Sandwich [4.0.3–4.0.4] - Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]
