Hi Flood, sorry for the delay. To answer your questions first: How old is your child please? 12 years Before Google family, when the phone is actually setup is the Android owner (you) the parent or the child - for example, to access Google Play Store is that done using your Google account? It’s the child’s account that actually is the owner. It is later restricted by installing Google Family Link. Regarding “2 accounts: the first (smartphone owner) was managed by Google Family Link “ is that Google Family Link for parents or Google Family Link for children & teenagers app? It’s Google Family Link for children & teenagers. The management app is installed on my phone. Regarding “run some app under the 2nd user only to block it from accessing private information of the 1st account - which apps please? It’s Pokemon Go. Pokemon Go requires access to contacts. On Android 5.1.1 I can’t restrict an installed app. it’s just take it or leave it. Regarding “Android 5 does not provide blocking access to certain data”, which data? As mentioned above it’s about the contacts I do not want to share with Niantic. So I set up a second account with no contacts at all. This uses another Google account as well. This Google account now is used to store all the Pokemons that already have been collected. Again: On my kid’s device I can always switch from the Google Family Link account to the KSK account. However, switching back is not possible unless I login using my Kaspersky account. Currently, my kids restarts the phone to gain access to the first account again. A note: I am using the free version of KSK. I am not sure if the “multi user functionality” is available in the paid version only. Regards, Kasper