Question

if a smartphone app is available on apples app store, what type of distribution channel is it using?
indirect
direct
indirect offline
direct online

Explanation:

In distribution channels, direct online distribution involves a company making its product available directly to customers through an online platform it controls or an authorized online medium. Apple’s App Store is an online platform where app developers (or Apple for its apps) make the app available directly to users (customers) online. Indirect would involve intermediaries, and indirect offline is non - online with intermediaries, which doesn't fit here. So the app on Apple's App Store uses direct online distribution.

Answer:

Direct online