Doodle saves its progress to our server every time the app returns to the home screen, or a child signs out. But it does need a data connection (3G, 4G or wifi) to do this. If it doesn't have a data connection, then it saves the progress on the device instead.
Make sure;
When a child finishes a session, they tap this sign out icon to guarantee the session has been saved.
Checking connection to the server;
If you select settings > work programme, you can see whether data from the app has synchronised to the server
A green tick is good.
If you see a red x, simply tap on it, make sure you have data connection and click Retry.