When I started to control my salt intake, I found that most food's labels were, at best, lacking information to compare between different foods. So I made this little app to help me decide which food to choose.

Clicking on bold text you can change between grams/milligrams of sodium/salt. Then type the data into the fields, the app will give you the percentage of salt compared with a daily upper limit of 2300 milligrams of sodium.