Are there monthly charges for the iOS Screen Mirror apps?
AirBeamTV offers paid apps without monthly fees and free apps with subscriptions.
You only pay once in the iTunes App Store that includes all major and minor updates and lifetime free support.
Subscription based apps (in-app purchase)
To enjoy the same features of the fully paid app, you can choose between different types of subscriptions (monthly, yearly and lifetime). At this time the following apps are available with in-app purchase: