Musicnotes Pro (iOS app) - Manage your subscription

If you have purchased the Musicnotes Pro - Premium - Annual, Musicnotes Pro - Annual (formerly Pro - Plus - Annual), or the legacy Musicnotes Pro - Standard - Annual membership subscription from within the Musicnotes Player for iOS app, you will need to manage your subscription through the Apple ID with which you had purchased the subscription. 

Subscription changes for Musicnotes Pro subscriptions - purchased from within the Musicnotes Player for iOS app - will be made immediately, whether you are upgrading, downgrading, or cancelling. 

Please note:

• You will be unable to manage the subscription purchased from within the Musicnotes Player for iOS app - upgrade, downgrade, cancel, etc. - from the Musicnotes website, or be able to change Musicnotes Pro subscriptions on the Musicnotes website. 
• Once subscribers upgrade from the legacy Musicnotes Pro - Standard, they will not be able to downgrade to Pro - Standard at a future time, as new Pro - Standard subscriptions will not be available.

Please refer to these instructions from Apple's support site: https://support.apple.com/billing