I have an app which has versions for both Android and iPhone. So I have two URL-s for them (Market and AppStore), but I do not want to add two different QR codes to the homepage. Is there a way (online service I'd expect) to have single URL for both markets, which will detect user device and will forward immediately to suitable application version? Programmatically looks really trivial, but perhaps someone has already solved the issue.
UPDATE: It seems I had to create the service myself. Feel free to try and use it also: http://qrappdownload.appspot.com/ . You can give two URL-s and it generates QR core for URL which is universal for the two biggest platforms. The universal URL is resolved by same service, based on mobile user agent (just whether it consists Apple or Android string is checked). Downside is that QR code has to be quite large, as the URL has to include both appstore URLs and is therefore pretty long. Maybe you can shorten the URL with some URL shortening service, have not tried it.