Do i have to buy premium acct to my phone as parent acct and at the same time premium acct to my child's phone? I don't know how this works but i trust kaspersky as my antivirus and i also trust that it will keep my child surf safely too

Hello @nhey_quebec,

Welcome!

1. No you do not have to purchase Kaspersky Safe Kids (KSK) Premium. 
2. You may install KSK Premium Trial (7days) on both your phone & your child’s phone, the proviso is the KSK version is the same on both devices.
3. After installing the KSK Trial application, you can test the software & decide whether on not to use the Free version or the Licensed version. The Free version has some limited features, no Technical Support & advertising. To use all of the KSK Premium features, after the 7day Trial, purchase & activate the License with a KSK activation code.
4. Before installing KSK check both devices meet the KSK hardware & software requirements?
5. The Parent must have an active MyKaspersky.com account to use and manage KSK. 
6. If the mobiles are iOS, KSK has less features & functionality. 

Please post back if you have any further questions & or need any assistance?

Thank you🙏

Flood🐳

Resources:

What is Kaspersky Safe Kids

How to set up Kaspersky Safe Kids

How to install Kaspersky Safe Kids for Android and set up child and parent profiles

Android KSK Library