We do scrumerfall here (or whatever you want to call it) and we estimate in hours (eeek!). We do not use the fields for capturing the hour estimates and progress in the story - as we don't totally want to follow waterfall! 
I am seeking data to know how long a story was in a status to understand a few things about our sprints.
- Are we estimating accurately
- Are there bottlenecks the data will surface
- Are certain devs taking longer on stories then other - to see how we can better set them up for success
I have seen some plugins - but not cloud based. And I am happy to run a search seeking the dates of stories in a status - but I can't seem to figure out the right search componets.
Help me help my team!