Airmeasure lets you measure everything from small items, to room dimensions, to faraway buildings and structures.
It has laser levels that can be added to any wall or surface. There are brushes for drawing or marking things in 3D. And a catalog filled with virtual furniture that can be previewed in a room.
The app is 99-cents for iOS and a beta version is available for Android.
Planimeter measures distances for a bunch of stuff. Learn the distance between holes on a golf course to measurements for gardens, fencing and more.
Contractors, for example, could use it to measure areas for paving, asphalt, roofing jobs, and more.
Measurements can be taken in a variety of ways, too, from foot to acre. The app is 7-99 for iOS
Toolbox Pro offers a wide range of measuring options. Everything from barometer and altimeter to plumb bob. Surface level and more.