Here you can understand the steps in mix designing and bullet priperties of materials.
https://civil4m.com/threads/become-concrete-master-learn-everything-with-me.319/
Excel program will work on desktop. In order to use it on mobile, download microsoft excel app from play store.
There is one problem in excel program, the select grade item is protected which not allowing to change value.
Will be updating excel program to make it work correctly as soon as possible.