Apologies if you've got here because the app has 'helpfully' suggested that you
'...consider purchasing the fully functional iThoughts app'
I hate it when apps deliberately restrict what I can do with them!
However...I make my living selling the iThoughts app. iThoughts2go only exists so that you can try iThoughts for FREE. The 'catch' is that whilst you may VIEW maps of any size, you may only AMEND maps with fewer than 20 topics. Other than that, iThoughts2go is identical to iThoughts.
If you'd like an unencumbered experience then please consider purchasing the fully functional app from the AppStore.
If you're unhappy with anything or have any questions/suggestions then please contact me direct as I can't respond to AppStore comments (Apple don't tell me who has left them.)