Gear In-App Purchase (IAP) is a Galaxy Apps service that let you sell digital content inside your application, which is installed on the Gear device. You can offer your customers a variety of items directly within your paid or free application. The IAP feature can be offered as a consumable, non-consumable, or subscription.
You can use the IAP, for example, in the following scenarios:
An application that enables additional features
Any application that allows the user to remove ads
A watchface that offers a free version for some hours
An audio-book application that allows the user to purchase and download new books
A game that offers new levels to play
An RPG game that allows the user to buy virtual items