For years, users have been asking Apple to implement a system through which applications from the App Store can be tried before being bought, but unfortunately the American company refuses to do so. To highlight a simple method by which this functionality can be offered starting with iOS 7, a developer thought to present un concept for iOS 7 of the entire system in action. In practice, developers could choose that their applications be available in a trial version for 1/7/30 days, and after the expiration of that term, the application would become inaccessible until purchase.
Developers can choose whether to allow a trial of 1, 7 or 30 days, or to disallow trials all together, on a per-app basis. For those apps that allow trials, the App Store would show a "Try for 7 days" button alongside "Buy app". If you install the trial app, it gets flagged with a "Trial" flag over the icon, in a similar way to the "New" flag that was introduced in iOS 6. When you run the app, it permanently runs with a double height status bar, which shows the amount of time left. Tapping this status bar opens the app store page allowing you to purchase the app. Once a trial is used up, you can't get a trial of that app again on the same Apple ID. When the trial is used up, the app icon still remains on your device, but the flag says "Expired" and tapping on it takes you to the App Store rather than opening the app.
The application installed as a trial in your terminal would have a special mark that would indicate that it is installed for testing, and during its run we would have displayed a banner that tells us how many more days we can try the application. After the expiration of the trial, the application would have displayed a mark called Expired, it will no longer be able to be accessed, and another trial will not be able to be started for the same application, on the same Apple ID. The developer's idea is very good and I am sure that many people would be happy to see the system implemented in the App Store, but there is a very big problem.
The trial applications would have full functionality, although they would be accessible for a limited period of time, and their hacking would be much, much simpler than in the past. Apple must think of an extremely complex system for protecting applications in this system, but until this is developed, everything remains just a good idea, but with little chance of implementation
