I have been using the Swisscom parental control app for months already; I use to be able to define the 'daily surfing time limit' per day of the week. Once the daily limit was used up, it would block the devise automatically. Which is what it is suppose to do.
Now, since a few weeks already, even though I do set a daily time limit (for ex. 2 hours between 15:00 and 20:00pm), the time limit clock doesn't work anymore; this one is not decreasing as the devise is being used, which means that the time limit is never achieved and, therefore, the devise does not switch off when it is suppose to (after 2 hours of play).