To view and edit your plan, click on the drop down menu, then Settings and then Billing Settings.

This page will show which plan you are on.

If you are on the free plan, you can upgrade from here by tapping the Upgrade to Premium button.

If you are already on a paid plan, tap the Manage your plan, card details and view billing history button.

This will take you to the Stripe billing portal, where you can...

1. Cancel your plan - by pressing the Cancel plan button
2. Add a new card - using + Add payment method
3. Change the default card or delete a card - by tapping the three dots alongside the relevant card
4. View your billing history