### v2.11.30
1.Supports an intermediate expression by writing a @ symbol at the beginning. The intermediate expression results are not included in the total.
2.Improved tax rate settings.
3.Supports a custom date format.
4.Added the total row to the floating widget.
5.Fixed some minor bugs.

### v2.10.29
1.Fixed a bug that cannot create new keypad.

### v2.10.28
1.Fixed a crash on certain device