I bought the Plus version because it's awesome! It converts everything! I would be totally lost without it.
At first I just used the lite version, but I got so tired of searching the web for calculators to convert the different things I wanted converted.
30 years ago I probably could have done them all on my calculator. Remember that old saying about "if you don't use it, you'll lose it?" Well I'm here to tell you it's very true! Thank you, David, for creating such an awesome and simple to use little app!!!