The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
Grafer help you calculate anything - cups of coffee, water, steps, sleep duration, strength of the magnetic field around, decibels level and much more.Apple Health app integration:- Reading sleep duration, steps count, walking distance, body mass. You can plot these data and send it to your e-mail or save in Dropbox.This application uses icons from http://icons8.com
Now you can enter a negative value in the data graphs.More data sources in free version.If you need any additional functionality - write about it via the menu item "Feedback."Please, rate the app if you like it :)