Is there a free app out there that you can use to convert units of measurement? (e.g. volume, weight, distance, speed, etc.) All the ones I can find cost money.
True, but if you aren't in an area with data coverage, this wouldn't work. And some people do not use any Google products, because they feel they aren't very good at keeping your information private (personally I do use Google products though )
For those not familiar with this handy tool, simply put in whatever you want converted say "100 lbs to kg" and the first search result will be your conversion table. Or enter "5*9+(sqrt 10)^3=" and the result will show. For more info on the Google "Calculator" Look here
There's one called something similar to Ultimate Converter. It converts a lot of different unit types, currencies, etc, etc. Has a lot of features (not free though).