For iPhone & iPad
If you have an existing subscription that you signed up for on your iPhone or iPad, and you wish to upgrade or downgrade to different subscription plan, follow these steps:
Open your iPhone or iPad Settings.
Tap your Apple ID name at the top of the screen.
Select Subscriptions.
Find and tap on the app (e.g., Arch, Fotorama, etc.).
You'll see your current plan and other available options.
Select the new plan you’d like to switch to.
Confirm the change.
For Android Devices
If you have an existing subscription and you wish to upgrade or downgrade to different subscription plan, follow these steps:
Open the Google Play app.
Make sure you’re signed in to the correct Google Account.
Find and open the app that offers to upgrade from a prepaid plan to a subscription or downgrade from a subscription to a prepaid plan.
Tap Manage subscription.
Select the new plan you want to change to.
Select a supported payment method.
Tap Buy or Subscribe.