diff --git a/Sources/Earthquake Network/Costanti.h b/Sources/Earthquake Network/Costanti.h
index ba18936..3748dd7 100644
--- a/Sources/Earthquake Network/Costanti.h	
+++ b/Sources/Earthquake Network/Costanti.h	
@@ -316,7 +316,6 @@ typedef enum : NSInteger {
 #define EQN_ADMOB_ANNUNCIO_IDA_TEST @"ca-app-pub-3940256099942544/2934735716"
 
 // ACQUISTI IN APP
-#define EQN_ACQ_IN_APP @"EQN_ACQ_IN_APP"
 #define CONTEGGIO_APERTURE_PER_SCONTO @"CONTEGGIO_APERTURE_PER_SCONTO"
 #define PREZZO_SCONTATO_SCADUTO @"PREZZO_SCONTATO_SCADUTO"
 #define IAPHelperPurchaseNotification @"IAPHelperPurchaseNotification"
diff --git a/Sources/Earthquake Network/ViewController/Dettagli mappa/PastquakesDettagliMappa.m b/Sources/Earthquake Network/ViewController/Dettagli mappa/PastquakesDettagliMappa.m
index b7e3e22..6184fff 100644
--- a/Sources/Earthquake Network/ViewController/Dettagli mappa/PastquakesDettagliMappa.m	
+++ b/Sources/Earthquake Network/ViewController/Dettagli mappa/PastquakesDettagliMappa.m	
@@ -57,12 +57,7 @@
     [self.buttonAzione addTarget:self action:@selector(visualizzaPikerFiltro:) forControlEvents:UIControlEventTouchDown];
     [self applicaFiltroWithTime:@(2)];
     
-    if ([[NSUserDefaults standardUserDefaults] boolForKey:EQN_ACQ_IN_APP])
-        NSLog(@"ciao");
-    else
-        self.bannerView = [EQNUtility ottieniBannerWithController:self position:NO];
-
-    
+    self.bannerView = [EQNUtility ottieniBannerWithController:self position:NO];
 }
 
 - (void)didReceiveMemoryWarning {
diff --git a/Sources/Earthquake Network/ViewController/Dettagli mappa/ReteSismiDettagliMappa.m b/Sources/Earthquake Network/ViewController/Dettagli mappa/ReteSismiDettagliMappa.m
index a157d5e..e35454a 100644
--- a/Sources/Earthquake Network/ViewController/Dettagli mappa/ReteSismiDettagliMappa.m	
+++ b/Sources/Earthquake Network/ViewController/Dettagli mappa/ReteSismiDettagliMappa.m	
@@ -36,10 +36,7 @@
 
     }
     
-    if (![[NSUserDefaults standardUserDefaults] boolForKey:EQN_ACQ_IN_APP]){
-        self.bannerView = [EQNUtility ottieniBannerWithController:self position:YES];
-        
-    }
+    self.bannerView = [EQNUtility ottieniBannerWithController:self position:YES];
 }
 
 - (void)didReceiveMemoryWarning {
diff --git a/Sources/Earthquake Network/ViewController/Dettagli mappa/SegnalazioniUtenteDettagliMappa.m b/Sources/Earthquake Network/ViewController/Dettagli mappa/SegnalazioniUtenteDettagliMappa.m
index 38520c3..5affc34 100644
--- a/Sources/Earthquake Network/ViewController/Dettagli mappa/SegnalazioniUtenteDettagliMappa.m	
+++ b/Sources/Earthquake Network/ViewController/Dettagli mappa/SegnalazioniUtenteDettagliMappa.m	
@@ -49,10 +49,7 @@
     [self.buttonAzione addTarget:self action:@selector(visualizzaPikerFiltro:) forControlEvents:UIControlEventTouchDown];
     [self applicaFiltroWithTime:@(0)];
     
-    if (![[NSUserDefaults standardUserDefaults] boolForKey:EQN_ACQ_IN_APP]){
-        self.bannerView = [EQNUtility ottieniBannerWithController:self position:NO];
-        
-    }
+    self.bannerView = [EQNUtility ottieniBannerWithController:self position:NO];
 }
 
 - (void)didReceiveMemoryWarning {
diff --git a/Sources/Earthquake Network/ViewController/MasterViewController.m b/Sources/Earthquake Network/ViewController/MasterViewController.m
index e24d61f..93ad41d 100644
--- a/Sources/Earthquake Network/ViewController/MasterViewController.m	
+++ b/Sources/Earthquake Network/ViewController/MasterViewController.m	
@@ -49,27 +49,17 @@
 
     [self sincronizza];
     
-    
+    // check for an AppStore receipt
     NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
     NSData *receipt = [NSData dataWithContentsOfURL:receiptURL];
-    if (!receipt) { /* No local receipt -- handle the error. */
-        
-        [[NSUserDefaults standardUserDefaults] setBool:NO forKey:EQN_ACQ_IN_APP];
-        self.bannerView = [EQNUtility ottieniBannerWithController:self position:YES];
-
-    } else {
-        
+    if (receipt) {
         [[ServerRequest defaultServerConnectionSingleton] inviaRicevuta:receipt success:^(id result) {
-            
+            // nope
         } failure:^(NSError *error) {
-            
+            // nope
         }];
-        
-        
     }
     
-    /* ... Send the receipt data to your server ... */
-
     SWRevealViewController *revealViewController = self.revealViewController;
     if ( revealViewController )
     {
@@ -105,9 +95,7 @@
     
     [self caricaChildrenViewController:[NSIndexPath indexPathForRow:0 inSection:0]];
     
-    if (![[NSUserDefaults standardUserDefaults] boolForKey:EQN_ACQ_IN_APP]){
-        self.bannerView = [EQNUtility ottieniBannerWithController:self position:YES];
-    }
+    self.bannerView = [EQNUtility ottieniBannerWithController:self position:YES];
 }
 
 -(void)registraNotifiche{
diff --git a/Sources/Earthquake Network/model/EQNUtility.h b/Sources/Earthquake Network/model/EQNUtility.h
index d2a03a8..0b9375e 100644
--- a/Sources/Earthquake Network/model/EQNUtility.h	
+++ b/Sources/Earthquake Network/model/EQNUtility.h	
@@ -12,6 +12,8 @@
 #import "MasterViewController.h"
 @import GoogleMobileAds;
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface EQNUtility : NSObject
 
 +(NSDate *)getDataFromString:(NSString *)stringData;
@@ -34,7 +36,13 @@
 +(UIViewController *)shareFileWithPath:(id)path;
 +(NSArray *)arrayDescrizioneEnti;
 
-+(GADBannerView *)ottieniBannerWithController:(UIViewController *)controller position:(BOOL)isButton;
 
+/// Creates Ad-sense banner to show on a given controller
+/// This method returns nil if the user has a Pro version, no banner has to be shown
+/// @param controller Controller
+/// @param isButton Is button
++(nullable GADBannerView *)ottieniBannerWithController:(UIViewController *)controller position:(BOOL)isButton;
 
 @end
+
+NS_ASSUME_NONNULL_END
diff --git a/Sources/Earthquake Network/model/EQNUtility.m b/Sources/Earthquake Network/model/EQNUtility.m
index d20fa43..365a43e 100644
--- a/Sources/Earthquake Network/model/EQNUtility.m	
+++ b/Sources/Earthquake Network/model/EQNUtility.m	
@@ -373,9 +373,6 @@
 +(GADBannerView *)ottieniBannerWithController:(UIViewController *)controller  position:(BOOL)isButton
 {
     if ([EQNPurchaseUtility isProVersionEnabled]) {
-        [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:EQN_ACQ_IN_APP];
-        [[NSUserDefaults standardUserDefaults] synchronize];
-        
         return nil;
     }