We have an enterprise iOS application and use an email invitation to invite employees to participate in a 2 day event using the app. Some employees have already downloaded the latest app from the app store and others have not -- but we don't know. What is the best way to handle this in the email invitation? We'd prefer not to have two different calls to action/two different links for the two scenarios.
We'd prefer not to have two different calls to action/two different links for the two scenarios.
So don't. Just put one link labeled Join Event! or whatever makes sense. If your question is "How can my web page determine if the user has my app installed and redirect to different sites/protocols based on that information?" you should check out this answer on Stack Overflow.