[varispeed]

Such feature is designed to catch people who might not pay attention. Innocent looking money grab.

Some better parking apps simply let you start the meter and then stop when you get back to your car, so you don't have to worry you miss it and get a fine.

[hoherd]

If you forget to pay when you get back to your car, are you charged the max? That's how it works with other systems like this that I've used.