BuyNote Free is the best application for your android phones!

BuyNote is the best way to take your shopping list with you everywhere! With this app, you can easily write down everything that you need to buy, and you can see all the items that you have to buy on a daily basis.

This app is perfect for people who like to make a list of all the things that they need to buy in the future. You can also use this app to keep a list of everything that you need to buy. 

The initial window is the calendar. A button of number 7 of the right-corner of the calendar is to switch the display from monthly to weekly.