Nice, but not intuitive.

This is a very nice converter app.
It passed 4 of my 5 accuracy tests: length, area, volume (cooking), and temperature.
It failed on mass conversion, because it seems to be missing "stone".
Although the interface is not very intuitive, it is slick. I think it just takes getting used to.
They do provide an auto-run tutorial when you first start the app.
Beware that only two categories come unlocked when you download the app. The others you have to buy in-app for $1.99.
Its not a huge investment, but there are other conversion apps just as nice, and free.
Overall, for a paid app, this is mostly worth the cost.

MoonSmiles about Convertr : Unit & Currency Converter