Feature request: "third side" of a card for hints/notes

[KillyMXI]

In order to better remember some words I often use various mnemonics.
With simple cards consisting of two sides I have no place to store extra notes without spoiling it on either side.
I need a part of information to be revealed only with the answer, regardless of what side was the question.

With Anki I'm able to make my own template of any complexity, but overall UX makes me sad.
I'm quite pleased with the look and certain features of Ulangi, but this one limitation will prevent me from migrating.