I just need one that can add up few items for eg. daily expenses etc. And should pop-up keyboard automatically as soon as I touch a cell.

No need for complex formula support or fancy graphics. Single sheet is also OK.

Edit: I am looking for something like this https://play.google.com/store/apps/details?id=net.thinctank.cellcalc

This one doesn’t popup keyboard so needs two touches to enter data. And I do not know how to access stored data!