As a matter of policy, we want to protect your privacy so by default the journals that you write are stored locally on your device. This means that if for whatever reason you delete the app and reinstall it you will lose all of your journals unless you turn on the "journal sync" feature in the settings. This feature will save a copy of your journals in a secure cloud (we can't read them) and allows you to download them later.
Turn on/off journal sync:
First step is to go to the profile tab in the bottom right of the main app screen and then click on the little white cog in the top right of the screen. Next, toggle on or off the journal sync feature by tapping on the little circle
Go to the journal settings button and then click "download journal entries" and that should do it!