Well that kind of matches the message he received from the website. It looks like they are just trying to notify you that there is a Chase Mobile App available

Well that kind of matches the message he received from the website. It looks like they are just trying to notify you that there is a Chase Mobile App available (which for the average phone user, would be 99.9999% better than using a browser). Personally I wouldn't use a phone for banking but some people don't have laptops/desktops.