Enter cumulative values

Thanks a lot to this Forum for the great information in it.

I am trying to have a cell where I enter values, one at a time in the same cell, and another cell, adds the values entered.

For example, on cell A1, I enter: 1,enter, 3, enter, 2, enter. Cell B1 will show: 1 then 4, then 6 (as the values on A1 are entered).

I have tried with circular reference, nut have not found a way to have it working correctly.

Any ideas will be highly appreciated

Thanks

As I am using Excel on an iPad, I cannot use VBA