Google has launched 'Property Sets' within their Search Console allowing webmasters to combine apps and sites within a single group in order to monitor overall clicks and impressions within a single report. It will be rolling out to all users over the next couple of days. This is a great feature for those that have many subdomains as well.
Google provides these instructions to get started:
1. Create a property set
2. Add the properties you're interested in
3. The data will start being collected within a few days
4. Profit from the new insights in Search Analytics!
Property Sets will treat all URIs from the properties included as a single presence in the Search Analytics feature. This means that Search Analytics metrics aggregated by host will be aggregated across all properties included in the set. For example, at a glance you'll get the clicks and impressions of any of the sites in the set for all queries.
This feature will work for any kind of property in Search Console. Use it to gain an overview of your international websites, of mixed HTTP / HTTPS sites, of different departments or brands that run separate websites, or monitor the Search Analytics of all your apps together: all of that's possible with this feature.