AnkiApp lets you organize related cards within a deck by using tags. You can then set up a review that focuses only on reviewing these tagged cards.
Cards can be tagged from the cards view, or during a review session. For tagging during a review session, you can choose the "tag" option from the side menu. Starring or ignoring a card is a convenient way to quickly add a tag that allows you to 1) quickly find starred cards in the cards overview screen, or 2) keep cards out of review sessions (if ignored).
To tag a card from the deck screen, open the cards view and choose a card. Star a card is at the bottom:
Now, to review the starred cards, go to the deck screen and find the "star" filter:
All the cards in your review session will now have the chosen filter.