My reply was to contextualize that it wasn't a lie. Maybe a poor choice of words, but given the context on the page, it's clear what it is talking about, which isn't the application being cross platform. A lie implies deception, which I think given the context on the page there wasn't any intention to deceive, just poorly chosen words that can have different meanings depending on the context.
I'm not trying to assume or criticize their intentions. I'm criticizing their unintentional mistake.