Most health apps throw 50+ metrics at you and call it insight. Ensta gives you one number that matters: your energy, 0 to 100, like a battery for your body. It pulls sleep, HRV, and stress from the wearable you already own, forecasts your energy 24 hours ahead so you can plan hard work for when you'll have the fuel, and explains why your energy shifted instead of just reporting that it did.
