I need a guide for adding trial period option for iOS app auto-renewing subscription without using separate server.The thing is that different time period options inside one auto-renewing group of items have separate IDs, however there is no ID for trial period. How can I request it from out my app after user presses Trial period button.There are no descriptions on Developer Forums and on other websites, no examples as well, so I don't know how to implement this.P.S.: I use RMStore to cover transaction APIs.Here is how the code approximately looks:- (void)performRequestForProduct:(NSString *)productID completionBlock:(void(^)(BOOL success))func { NSSet *productIdentifiers = [NSSet setWithObjects:kInAppIDUltimate, kInAppIDPremium1Year, kInAppIDPremium1Month, kInAppDonationBundleID, nil]; [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; [[RMStore defaultStore] requestProducts:productIdentifiers success:^(NSArray *products, NSArray *invalidProducts) { if (invalidProducts.count