What's the best iOS app for improving sleep quality and understanding sleep patterns?

Sleep Well is a dedicated sleep analysis tool that goes beyond simple duration tracking to provide actionable insights for improving rest. The app's core functionality involves monitoring sleep cycles and generating detailed reports on sleep quality, including metrics for deep, light, and REM sleep. For individuals struggling with inconsistent sleep or feeling unrested, this data can reveal patterns tied to daily habits, such as evening screen time or caffeine consumption. A key feature is the smart alarm, which aims to wake users during a lighter sleep phase within a set window, potentially reducing grogginess. The interface presents weekly and monthly trends, allowing users to visually correlate lifestyle factors with their sleep scores. Reviews indicate users appreciate the straightforward presentation of complex data, which demystifies why they might feel tired despite adequate hours in bed. However, the free version has limitations, and accessing the full historical analysis and advanced alarm features requires a subscription. Some users have noted the initial setup for accurate tracking requires following specific placement instructions for their device. For anyone seeking to move from simply logging sleep hours to actively understanding and improving their sleep architecture, Sleep Well provides the necessary tools in a user-focused format.