Sleepcraft is a free health app that delivers advanced sleep tracking and analysis by reading your Apple Health sleep data and breaking it down into detailed phases like light sleep, deep sleep, REM, and awake time. It's designed for folks who want more precision and clarity beyond basic sleep stats.

What Sleepcraft does best 

Sleepcraft maps your sleep architecture onto a 12‑hour clock face, showing how much time you spent in each sleep stage with age‑adjusted clinical benchmarks. It also lets you tag lifestyle factors like caffeine or exercise and see how they relate to sleep trends over 90 days. 

Sleepcraft offers more depth than many free trackers, but it currently requires Apple Health data, which means you’ll likely need an Apple Watch or another HealthKit‑compatible device to get meaningful results. Without this, the app can’t generate its full suite of detailed sleep metrics or trends. 

Smart sleep analysis for curious users 

Overall, Sleepcraft stands out as a powerful analyzer for sleep quality, especially if you already use Apple’s Health ecosystem. Its rich visualizations and phase scores help you understand sleep patterns more completely than basic trackers. While it’s best suited for Apple Health users, it’s a valuable tool for anyone serious about sleep insights.