Ability to use a calculator when entering bill
When entering a bill, it would be handy if there's a quick plus button there so that I can add multiple items fast and easy.
Currently there's an empty button on the number pad that shows up which I think could very well be used for simple plus/minus calculations.
We just added a very basic calculator function to our web app, so you can now use basic mathematical operations when entering a cost (addition, subtraction, multiplication, and division). We hope to add similar features to our mobile apps at some point in the future!
I want this feature as well. This might not seem like a great feature but this is cool and helps the end user a lot. When I have to take out items that only belongs to me or when I enter itemized bills, I miss this feature so much. Just + and - should be a good start. * and / will need a little thinking because of operator precedence.