Ability to update your goal parametes

One feature request for you to consider.
As I was trying out other Habit trackers, I saw one that allowed you to update the metrics for a habit (e.g., go from 3 days a week to 4 days a week) without disrupting your historical success rate. It would measure the habit based on the new metrics only going forward.
This would allow you to work your way up to a goal without putting the final goal in the metrics and missing it for many weeks as you progress.