Quite aside from the scummy behaviour, the assumptions behind it are a real bugbear. Just because I'm on a mobile browser it doesn't mean I'm able, or want to,

Quite aside from the scummy behaviour, the assumptions behind it are a real bugbear. Just because I'm on a mobile browser it doesn't mean I'm able, or want to, install apps on my phone. What if it's a friend's phone, or I don't use Google Play, or it's an out of date version of Android, or any number of reasons.