This app allows you to create a sequence of timers on your phone, and then play, pause, and reset them from you FitBit. The design and purpose of this app was inspired by HIIT workouts, but this app could be used for anything from exercise to cooking to reminders.
Due to an issue with the Fitbit SDK (documented here https://community.fitbit.com/t5/SDK-Development/AdditiveList-not-allowing-duplicate-items/td-p/4114674), you cannot add duplicate timers (e.g. you cannot do 5, 10, 5, 10). However, there is a work around that you can do by using decimals to make them unique (e.g. you CAN do 5, 10, 5.0, 10.0, 5.00, etc).