Here’s how to grab more Diamonds:
Head to the Bestie tab by tapping the chat icon in the bottom-right corner.
Tap the call button in the top-right. If you’re out of Diamonds, you’ll see a prompt to purchase more.
On the payment screen, choose the Diamond package you’d like and you’re all set to keep the conversation going!
You can view your current Diamond balance on the Profile screen, accessible from the Journal tab (pictured). Tapping the Diamonds card will also take you to the purchase screen.