Sleep takes up a third of our lives, yet it’s often the part we understand the least. Pillow is a sleep tracker for iPhone and Apple Watch that helps improve your rest by making sense of what happens once you drift off. By automatically tracking sleep stages, heart rate and nightly habits, the app turns raw data into useful insights you can act on.

What we love: How effortlessly Pillow fits into your routine. Automatic sleep tracking kicks in as soon as you fall asleep – mapping light, deep and REM phases with no set-up beyond placing your iPhone on the mattress or wearing your Apple Watch. Optional soundscapes and guided sleep aids help ease the transition from busy days to slower nights while Smart Wake Up chooses a gentler moment to wake you.

Quick tip: Wear your Apple Watch to track your vitals automatically and log how you feel when you wake up. Over time, Pillow connects factors such as your mood, caffeine intake and stress levels with your sleep quality, helping you spot what leads to better nights.

Meet the creator: Neybox is focused on building thoughtful, privacy-first wellness apps. It was founded by Spyros Passas and Panos Spiliotis, who took plenty of naps while developing Pillow.