App Store Subscription:
Launch the Settings app on your iPad.
tap on iTunes & App Store.
Tap on your Apple ID at the top.
Choose View Apple ID from the popup menu.
Enter your password when prompted and tap on OK.
Tap on Manage under Subscriptions .
Tap on the name of the subscription you'd like to cancel or modify.
Turn the Auto-Renewal option to Off.
LumaShare Direct Subscription: You can cancel through fotoShare Cloud (Subscriptions > LumaShare > Billing)