Stand Hours

If you work at a desk (like me), or are in school and spend lots of time doing homework (also like me), standing up is an easy way to become just a little bit healthier each day. Getting up and walking around for even just one minute (100 steps) during an hour counts as a "stand hour."
Stand Hours reads your step data from the Health app, which means it works with any fitness tracker that supports Apple Health (including the iPhone's built-in pedometer).
Stand Hours also gives you hourly push notification reminders to get up and move around. The days and times that you receive these notifications are completely customizable.
In addition to reading steps from Apple Health, Stand Hours can (optionally) export your stand hours to Apple Health. Yes, Apple Health has a metric called "Stand Hours," but that can only be used by the Apple Watch. Instead, this app can store your stand hours as ANY activity metric in Apple Health - such as an empty one that you don't use. It's a great way to see this data in the Health app, even if you don't have an Apple Watch!