From your dashboard screen, please click on 'Rewards' on the bottom right corner of your screen: 

You can see all Current Rewards on your app by swiping to the right. 

On iPhone: Grey dots on the bottom of the screen indicate how many rewards are currently available. 

On Android: You just need to swipe Right. 

If you want to see the past Rewards, please click on Rewards History on the bottom of your screen.