If you're using an Android device, you can update your SkoolTree app through the Google Play Store. To do so, open the Google Play Store app and tap on the menu icon in the top left-hand corner. From there, tap on "My apps & games." Under the "Updates" section, you should see SkoolTree listed. If there's an update available, tap on "Update."
If you're using an iOS device, you can update your SkoolTree app through the App Store. To do so, open the App Store app and tap on the Updates tab at the bottom of the screen. You should see SkoolTree listed under the "Pending Updates" section. If there's an update available, tap on "Update."