E.g. when I ask for the current exchange rate it claims it's data is from today:

Which is not true:

Yes, it says below, "This rate can fluctuate, so it's always a good idea to check a live currency converter for the most up-to-date information," but that's a very high mismatch.
Another, even bigger mismatch:

Either no output or up-to-date output (if it's not real-time, put a disclaimer that it's from today at exact time).