Publishers offering "In App Interstitial" spots

An in-app interstitial is a full-screen ad that appears at a natural pause in an app, such as between levels or screens. Publishers like Unity and Moloco serve it across many apps, and the user closes it after a few seconds.

How it's sold: You usually book it programmatically through a mobile ad network or a DSP, and a few publishers also sell it through their sales team. Four publishers list it today.
What it costs: Most publishers quote this on request, and it is normally bought per thousand impressions.
What you supply: You supply a full-screen image or a short video in portrait and landscape sizes, plus a store or landing page link.
Best for: It suits you if you want app installs or a big, hard-to-miss brand moment.
Before you buy: Check how often a single user can see the ad, since too many interstitials in a row can annoy people and waste your budget.