This app calculate exercise time(21 sports) from Calorie.
If you are on a diet, before eating food, you check exercise time.
It may desist from eating between meals.

・example
Weight : 60 Kg, Calorie : 1000 Kcal
Running 2.6 Hour
Swimming 1.6 Hour
・・・・

「eat this food, How much should I exercise.」you can know it.

※This app calculate by METs values.
2011 Compendium of Physical Activities: A Second Update of Codes and MET Values.
Ainsworth BE, Haskell WL, Herrmann SD, Meckes N, Bassett DR Jr, Tudor-Locke C,
Greer JL, Vezina J, Whitt-Glover MC, Leon AS.
Med Sci Sports Exerc. 2011, 43(8):1575-1581.