title: Google Wallet Instant Buy versus Inapp
body: <p>I'm currently researching making online payments through Google Wallet for a website.  There will not be physical goods.</p>
  
  <p>I saw that there are two very different checkout API's,  inapp purchases <a href="https://developers.google.com/commerce/wallet/digital/docs/" rel="nofollow">https://developers.google.com/commerce/wallet/digital/docs/</a> and instant buy <a href="https://developers.google.com/commerce/wallet/online/tech-overview" rel="nofollow">https://developers.google.com/commerce/wallet/online/tech-overview</a> , but I'm not really sure what exactly the differences are between the API's in terms of when you should be using one versus the other.  Can anyone explain?</p>