New Features 🎉

Using up and down arrow keys will now cycle through your history of solutions and concatenate it to your current calculation
Entering infix operators on an empty textfield will insert the previous solution before it (the subtraction operator on the keyboard does not do this, as it could also act as a negative sign)
Button layout modified to support new history cycling

Notes

The app is not signed, so it will give a warning when attempting to run it for the first time