Precise CAD-like self-adjusting measurement lines/arrows

Does anybody know of any add-on that can help to add precise CAD-like measurement-indicating lines/arrows that would self-adjust if the object’s dimensions are changed? The only one I know is the Measureit add-on, but it is very cumbersome to use compared to Sketchup’s Dimention-tool ( ). Here is also an add-on ( ) that’s even better than the original tool. For those of you looking to write a killer python script/add-on, something like this would be a massive improvement, kind of like the CAD Transform Addon.
Thank you.

Is this what you need?