Surprised no one has mentioned https://instacalc.com https://instacalc.com yet. Not a native Mac app but genius. Update: There is a chrome extension https://c

Surprised no one has mentioned https://instacalc.com https://instacalc.com yet. Not a native Mac app but genius. Update: There is a chrome extension https://chrome.google.com/webstore/detail/instacalc/hfoojdaofolilkhakmhicmonbjmkpoai https://chrome.google.com/webstore/detail/instacalc/hfoojdao...