My mirror stays empty but I've been drawing cards!

The mirror pulls the data from your saved readings. 

That means that you need to save your tarot readings for it to work. Our app does not save your readings to the cloud automatically, you'll need to input your question, and any notes that you may have for it to be saved. 

Here's how you can save a tarot reading.

Update: In 1.8+ you have the option to auto-save your readings. Please see this article on how to enable this feature.