hi not bad for the beginning. but it should look a bit more serious. the app will contain 2 bmi types, waist to hip ratio calculation, waist to height ratio calculation, calories calculator, body fat calculator and a recommended dietary allowances calculator. the little images should somehow fit the caluclator types. also the green is a bit to dark. also pls aware that the icon sizes are
36 x 36 px 48 x 48 px 72 x 72 px 96 x 96 px. if the logo is too detailed it will look awefull on 36x36px