Subscription apps often start with a free trial and then require users to pay a subscription fee. You can offer a physical or digital reward equivalent in value to your one-month subscription. This allows the customer to use your service longer and potentially stay a subscriber for subsequent months.
Drive free trials past the install by offering a physical or digital reward to new customers who sign up and finish three pieces of content.
Upgrade your subscription
Encourage your users to upgrade from the basic subscription to the premium or longer subscription by offering a real world reward equivalent to the price difference.