Depending on how they are implemented, interstitials for app installs can lead to a search penalty. This particular targeting is part of the mobile-friendly algorithm used by Google:

“Starting today [Nov 2, 2015], pages with an app install interstitial that hide a significant amount of content on the transition from the search result page won’t be considered mobile-friendly.” source

Make sure you follow the official guidelines for designing and presenting app interstitials.