Frequently Asked Questions Can I buy Philips Sonicare For Kids brush heads from the app? If you are using the Sonicare For Kids app, there is an option to purchase the brush heads from the app. Below you will find more information. Purchasing new brush heads It is recommended to change your Philips Sonicare For Kids brush heads regularly (every 3 months). On the Sonicare For Kids app, you can set a reminder when it is time to purchase new brush heads. There will be a link on the app that can direct you to where you can purchase them.