The rewards you can win will be listed under the tab 'My Hearts' as shown below.
You can use your Hearts to unlock gift cards that are available for your level (read more about choosing your reward pool here). An unlocked gift card is one that you can potentially win whenever you play a game in the app. Unlocking a gift card is not the same as winning one π
As you can see above, I would need five hearts to unlock the Priceline gift card. After I unlock it, each time I play a game in the app, I could win either a Kmart gift card, a charity donation or a Priceline gift card.
Each time you complete a task, you earn points that can advance your level. As you level up, more gift cards become available to be unlocked. The screenshot below shows that I can not unlock an Amazon, Bunnings, Flight Centre or Netflix gift card until I reach level 7.
Interested in knowing how you can win rewards? Read this quick article!
Learn more about hearts and levels here.