This is an interesting App by Developer @WadesHull. It basically allows you to estimate lengths in picture if a particular length is known in the picture. I like this idea, its different in a sort of Novel way without being a iPhone farting type App.
This app is a simple proportions app that lets you set the end points of a known length in a picture, and then asks for the end points for length in question. After you get those 4 points set and put in the value of the known length it will calculate how long the unknown length is.
One of the greatest attributes of this app is that it is written completely in QML. In fact just about every app that I will release will be in strickly in QML as I am not a programmer by trade. Just a guy who likes to have fun. I doubt I will be releasing this to the N900 as I use QtMobility? 1.1 and the N900 was abandoned back at QtMobility? 1.0.2 I do hope to port it to Symbian^3 at some point in time.
Source Nokia Developer