This is a really cool app that takes the measurement and height of anything you point at. The app uses the camera and turns it into a range finder. It’s reliable enough to take measurements for general purposes, but it could still use some tweaks to be used as a completely accurate guide. The free version shows off the main features of measuring height and distance with trigonometry.
The paid version really only ads one important feature which is width and area. This is a handy little app to have in your tool kit on your Android. Just keep in mind that when you are getting the distance of an object that you should point at the base of the object. This will give a more accurate measurement.
This is a good app for rough measurements; however it is limited to 50m.