Easy to set up and daily tracking is very simple. Visual display is great. If a habit is set for every other day, or with some other gap in between, the app shows a chain with open circles rather than solidly-colored circles. Likewise, if the goal is a specific number of minutes or repetitions, it color-codes the entry differently depending on whether you met or did fewer reps than the goal. Only using the free app for now but plan to upgrade.