Overall Serenity is great! I've created routines for my morning, when I first get into the office, when I get home from work, and before bed and they're really helping me stay organized and productive.
I do have a few minor quibbles and feature requests though:
* The Get Inspired tab isn't very useful after you've looked at it once but takes up 25% of the main navigation bar; a way to toggle it off would be nice. Similarly, the Daily Quote isn't something I use and the ability to disable it would be nice.
* Give more options around moving from current task to next task. Currently, if I click next task it marks current task as not done. If I have 5 minutes allocated for "Do the Dishes" and finish the task in 3 minutes, let me mark the task as done and move on to the next one. Maybe have 2 options at the bottom "Mark as done" and "Skip"?
* Pause behavior seems weird? Like it keeps moving through tasks in the background while paused? Again, if I have a 5 minutes "Dishes" task but it actually takes 8 minutes, let me pause it before the 5 minutes is up, unpause it when I actually finish the task, and have the routine pick back up without "stealing" the extra 3 minutes from the next task.
Again, great app overall but I'd like to see more features around managing and interacting with routines and tasks, less inspirational/motivational stuff, and the UI either more minimal or more customizable.