We monitor all the apps available on the iTunes platform and Google Play on a weekly basis and that tracks both new apps that have come to market and also updates and new versions of apps that are already available.
Where we detect an update or new version of an app that we have already reviewed, we automatically flag the existing review with a notification that it relates to a prior version and we put the new version of the app back into our review queue to be reassessed.
It is important to only rely on reviews that relate to current versions of an app as updates and new versions can materially change an apps performance, risks and issues.