How to change your iOS Subscription
Changing your Apple iOS Subscription for PostureScreen is no different than any other application. This is all controlled completely through the Apple AppStore directly, not our application.
To Edit, Upgrade, or Cancel and change an existing subscription, simply under the Upgrades button, click Manage Subscriptions button -OR- open AppStore app directly and follow these steps.
A Step By Step Tutorial from Apple is also available here: https://support.apple.com/en-us/HT202039
Video Tutorial Link: https://youtu.be/nVMyeiEzwJE