Frequently Asked Questions Should I log out each time I close the Avent uGrow App? There's no need to log out of your Philips Avent uGrow App after each session, although you can if you want to. Find out what happens to your data when logged out. Sync the app To prevent data loss you are not able to log out when you are offline and data is not synced. Syncing is done in the background and happens automatically if you're connected to the internet.