The app from hell. Locks up iPad forcing restart.

A very fine app indeed but with 2 tiny problems (thus 4 stars, rather than the 5 it would otherwise earn). 1. It only “works” on level ground for distances between 0 & 20 ft. 2. It requires 2 people to “work” at all, one to hold the iPhone against the tip of his nose, the other (a preferably taller person) to read the distance off the screen. On the plus side--& this is the great strength of the app earning it a postive review here--there’s a complete range of user heights extending right down into negative territory. This thoughtful feature means that the app would be usable (were it usable at all) both by extremely small people & by people of any height suspended upside down over a cliff face, say, or a tall building.

Slow and buggy. Avoid