Germany is regulated to the n'th degree. Everything has a rule. Having lived in the country for a great many years rules include,
No hanging washing out on a Sunday
Mowing the lawn to be undertaken not after certain times, not on Sundays
No barbecues on balconies
Dogs are not allowed to bark after 9pm (sign on farming village notice board)
No car washing outside your house, only in designated car washes (Kries Holzminden)
Fail the driving test 3 times you will have to attend the 'idiots school'
Winter tyres compulsory on a specific date in October
A fine if you shout at, abuse or stick your fingers up to another motorist
Recycling inspectors look in bins
Weed killer banned
You are responsible for the pavement (snow) outside your house
Every aspect of life has a rule so you know exactly where you stand, not only do the police enforce these rules but your neighbours will willingly tell on you 'Anzeigen' or report you to the authorities. It's in their DNA and psyche.
The Germans will eventually allow the app, but only when they have thoroughly legislated for it.