Hi samhita009,
We are working on full data synchronization using GMAT Club account, but unfortunately it's not available so far. At the same time, you can synchronize OG books data with any device you want or safe backup copy.
- Go to the Books tool, tap second button on your right (a square with 2 arrows), tap "Backup", send email to any account you have access from iPad.
- Open email on your iPad, select and copy data, open GMAT ToolKit and go to the same settings, tap "clipboard" and that's all.
I don't know whether iTunes should or shouldn't synchronize apps' data... if history from the Practice tool is very important for you, please, pm me and maybe we can figure out how to transfer it before we finish our work with the full data synchronization.
Best,
Walker