How do I distinguish apps with in-app purchases from completely free apps on Google Play? As far as I can tell, Google does not provide a mechanism for searching for completely free apps in Google Play.  When using the FREE filter, you get both completely free apps and apps with in-app purchases, where some elements are unavailable without paying, so they are not completely free. In some categories, most of apps' content is available via in-app purchases only, so it's misleading to have such apps in the free list.

In the Google Play application, I am able to detect that an app isn't completely free If I open the details page and see "In-app purchases" on the left side.  It is inconvenient having to open every app page just to verify this, but at least it's a workaround.  Is there some way to include that criteria into the search function?

Additionally, when searching Android apps through a desktop browser (Chrome) instead of the Google Play app on the device, "in-app purchases" does not appear to be displayed, even in the details page of the app.

The question: How to detect or filter out apps that are not completely free, on Google Play?
I'd say we've waited it out – as meanwhile this issue seems solved:

 
Screenshots (click to enlarge)

As the first screenshot (top of the page when visiting with the web browser) clearly shows: If an app offers in-app purchases, it is marked such (look where my arrow points to). At the bottom of the page, you can even see the prices per item (second screenshot).