By far the best habit and goal builder/tracker on the App Store. Well-designed (also in terms of "how it works"), flexible, powerful. And very actively developed.
The new business model introduced with version 3 still seems overpriced, unfortunately. Previously existing users like me got a free lifetime subscription, though. Nonetheless, I doubt that the heavy monthly price tag helps to grow the user base. ;-/ Which otherwise would be well-deserved.
brsma about Strides: Habit Tracker + Goals, v4.1.1