Calculator with history.

Have you recalculated many times to make sure the result is correct?
This calculator does not need to recalculate because you can check the input contents.

This calculator can be corrected immediately by pressing the "delete" key to delete the incorrectly entered numbers and re-enter them.
There is no need to re-enter what you have entered.
(The "Delete" key is valid for numbers.)

History can be shared with the "share" key.
History can be copied and shared by long pressing.

[Disclaimer]
The author is not responsible for any damages, lost profits or any claims from third parties caused by using the software.