Google has allowed both Android / iOS developers to publish deep links through a part of the Google Play Services API, which is App Indexing API.
This talk is a super brief introduction to App Indexing API for those who do not know about it, have heard about it but not really sure what it is or how to implement it.
* https://developers.google.com/app-indexing/android/publish?hl=en
* http://search-codelabs.appspot.com/codelabs/app-indexing#1
* http://searchengineland.com/google-adds-additional-ranking-boost-for-using-app-indexing-api-232018