Apps for IPhones and IPads for Home Modification Practice

The USA OT Conference featured an interesting session on apps for practice. Some of the popular apps used by staff include:
My Measures Pro
Measures Lite
Magicplan
Upad
Cad Touch
Doodle Buddy
Finger Cad
Home 3D
Iblue Print 2.0
Touch Draw

I would be interested in hearing from anyone with some terrific suggestions on apps that they have used, whether they are listed above, or any new apps. In particular, some information on what works well and what doesn’t with respect to the various apps that are available through the app store, would be great….