iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Developers Now Able to Provide Promo Codes for In-App Purchases
Promo codes for apps have long been available, but were previously limited to initial app downloads and were not available for in-app purchases. This change will make it easier for developers to give early app testers, reviewers, and other users access to the full content available within freemium apps.
While it is unclear if the feature is currently available to all developers, Jeff Scott of 148apps.com shared a screenshot on Twitter of an in-app purchase promo code for Real Racing 3, from major developer EA. EA is using the promotion to give customers 10 free gold within the app, which has an in-app value of $1.99. The gold can be obtained by visiting this link on an iOS device.
Entering the promo code provides users with gold in the app, and if the app is not installed, it will automatically download before redeeming the in-app purchase code.
Apple has not yet updated its developer site to reflect the availability of in-app promo codes and its rules still state "Promo codes don't work for In-App purchase products, including Newsstand issues."