Thanks ☺️ that’s the peaks app. It’s a great app for your Apple Watch and iPhone if you sleep track every night with your Apple Watch Ultra. It uses your heart rate and sleep tracking data to plot your energy levels, learn how to manage good habits and healthy choices and even safeguard you from harmful or unhealthy choices like cutting down on caffeine intake, limiting midnight snack and you can also adjust the times accordingly with your schedule. I also recommended it when I discuss about self care with others, and to my Apple fan friend who also sleep tracks with his Apple Watch Series 6. You may need to get used to the routine in the first few days of using it like the training load which the times may seem like a bit off but once you get used to it you’ll like it.
Feel free to try the full version- you get more widgets and complications for both Watch and the iPhone. The full version is free if you book a teleconference call with the developers which are nice youngsters who spent all their days as Apple Watch wearers to build the app- and they listen to your feedback as well. You will also be able to test out their new update being built with SwiftUI through an interactive simulation which will also allow you to get industry insights into iOS development!