It started well, but then allowed blocked sites through.......I'll have to check the setup etc is right & report back later.

Later........

I would suggest the clock needs to be simplified & some obvious instructions on how to setup the app. would be greatly beneficial, I did eventually get it to activate the 'time interval' for 23.58 mins. [I think].......{Does it really need a 'time interval' ?......}...we'll see how it goes, I'm still trying to figure it all out.
It would be a shame if it wasn't improved, 'cos it's a really nice piece of software that is really needed nowadays. Please don't let small faults reduce the efficacy of this app. You deserve a better response for all the time, effort & expertise that you must have put in order to write this app. !