MapQuest has become the top iPhone app in the US after refusing to change the name of Lake Ontario. The mapping service made this decision following an executive order by President Donald Trump to rebrand the lake as Lake America. As a result, MapQuest has seen a surge in popularity, overtaking other popular apps such as ChatGPT and ESPN Fantasy Sports on the US App Store.

The service was ranked number one for free apps on Apple's App Store and number eight on Google Play. Further details about this development are available, including the circumstances surrounding the executive order and MapQuest's response to it.