[shepik]

The interface looks great.

Handling of "to" is a bit odd though.

150 kn in km/h [277.79976 kph] - this is unit convertion

150 kn to km/h [-276.79976 kph] - this is unexpectedly subtraction. I expected the unit conversion here, because of Raycast and Google

[tonyonodi]

Yeah, this was a deliberate decision, but a tough one and I can see why you might find it annoying. I think it makes date and time calculations more readable:

09:11 to 15:46