Here this will help you
https://www.cubi.casa/for-appraisals/?referral=workingre2382022
Question: If you use this tool are YOU measuring per ANSI? I say yes for several reasons.
1. YOU used the APP just like you used a 100 Ft Tape or a Laser.
2. Is this app accurate? Yes, it is no more/less inaccurate than a 100" tape or a Handheld Laser or combination of both.
Question: Should FNMA adopt this Cubi.casa App or a Competitors App? I say yes! It saves Time, It is consistent with ANSI. The only error is exterior/interior wall thickness of each subject. That would be a universal MINOR error for all Subjects. Another Potential Problem with Cubi-Casa might be on Upper Floors that have for example a Bonus room common over garages that has a Knee Wall.
What do you think Nando?