Useless.
I bought the CDs for the Gettysburg tour that went with this. Logged in and entered the code to get the app to work with the CDs. Sorry, that code was used too many times. I go into the store, all the books have the same code. I text the number for support on a weekday, no reply. I call the number and leave a voicemail. No reply. Sent a support message via their app. No reply. The CDs were a waste of $40 and the app is useless without the codes. Don’t waste your time or money on either.