Purchasing does not work.

If you have problems purchasing the Wokabulary please check the following:

It sometimes happens that the App Store is down. Please check Apple's system status
Make sure In App Purchases are enabled on your device
Make sure the payment information on your Apple ID is valid
In the App Store app make sure you are signed in with the correct account and you have selected the correct store for your country
On the Mac, it often helps to log out of the Mac App Store (select "Sign out" from the Store menu in the App Store app) and then log in again
Try restarting Wokabulary (on the iPhone or iPad force quit the app by pressing the home button twice and swiping the Wokabulary window out of screen)
Try restarting your device

If this all fails and purchasing still does not work for you, please contact us.