[pc86]

They can always tell their employees they're not allowed to do something, and punish the ones that do. I think it's an important distinction though that whatever they tell their employees, the app isn't doing anything wrong in a legal sense. So still legal, possible, and difficult.

[OJFord]

And I don't think there's anything illegal about the employer making it more difficult; that may well be the cheapest/easiest way of stopping employees using it.

[messe]

There's nothing illegal about it, but that doesn't mean that making life harder for your employees trying to make sure the hours they're working are legal is moral.

EDIT: I welcome anyone who wants to justify this ethically.

[OJFord]

Agreed. I haven't commented on morals, ethics, or even witb judgement on what ought to be legal or not.