> In the last few days I had the choice of use the app or drive 20 mins each way plus park, walk and possibly queue.

It's rather shocking that this government service, whatever it may be, isn't accessible through a normal browser. Still, I would rather spend an hour driving somewhere than run spyware on my phone, at least if this is a one-time event. If I somehow faced an insurmountable inconvenience however, I would probably cave in and purchase a cheap Android phone only for these tasks.