For most projects a measurement to within half a foot is fine for estimating. If the total width of a room is close to 12 or 15' (standard carpet roll widths), get an exact number to know if your carpet sub needs to seam two pieces of carpet together.
Door heights are standard on most houses. Electrical heights are usually standard. Windows are usually dropped the height of a header.
For estimating many projects (painting, flooring, non-custom trim jobs), this app would be more than adequate.
When you get the job and go back to do the work, I'd suggest a Bosch LASER tape measure. Accurate to within 1/16" or better. It's great for trim work.
1. Obtain laser tape, pencil, and paper.
2. Sketch out floor plan with pencil on paper in rough scale.
3. Take laser tape and take needed measurements. Annotate measurements on your rough scale paper drawing.
4. Go back to desk and open OmniGraffle (or Visio or whatever).
5. Draw up a scale floorplan, exportable into any needed, industry standard formats.
6. There is no step 6.
Some variation of this HOWTO has worked for me professionally for 2 decades. Sometimes, the old way is better than a novel, high tech solution.
Edit: And yes, I did try the Roomscan app. It was tedious and inaccurate.
And while not germane to your particular use, this is still worth noting:
"Structure allows you to capture dense geometry. This enables you to simulate real world physics."
Easy enough to try both though.
Edit:
Btw, anyone who applied for Project Tango got back from them in any way? I didn't.
I haven't seen even an e-mail confirming they received my application, so I don't know whether I was rejected or never entered.
All in all, it is a very good (FREE!) app that can be used to get a decent idea of what might be needed in home renovation.
I have difficulty seeing any professionals adopting RoomScan as it still seems more difficult than just using a laser measure.
[1] http://www.extremetech.com/extreme/126843-think-gps-is-cool-...
I haven't tried anything, but it seems there are already lots of solutions and this is just another approach.
Couldn't find it on my brief scan of the article.
can't get past 2 walls. iphone 4s