Before you buy, you have already seen what Heartgild makes from your photo thanks to the free portrait. A themed pack gives you 10 portraits in one theme.
The $9.99 option lets you choose any four packs (40 portraits in all) and use them on up to 4 pets. Themes include Fine Art, Silly, Vacation, Holiday, Cozy, Superhero and Retro.
Packs also include the option to add extra photos for a closer match. Portraits made from extra photos use 2 of your portraits each.
Packs are a one-time purchase and do not expire, and credits are stored on your device. If you uninstall or switch phones they cannot be restored, so keep that in mind.