diff --git a/DevCleaner.xcodeproj/project.pbxproj b/DevCleaner.xcodeproj/project.pbxproj
index af84fb5..b119046 100644
--- a/DevCleaner.xcodeproj/project.pbxproj
+++ b/DevCleaner.xcodeproj/project.pbxproj
@@ -17,6 +17,7 @@
 		7110B4992030F17B00EDBFA3 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 7110B4972030F17B00EDBFA3 /* Main.storyboard */; };
 		712F999E20D65229003927BC /* Donations.swift in Sources */ = {isa = PBXBuildFile; fileRef = 712F999D20D65229003927BC /* Donations.swift */; };
 		712F99A020D6810A003927BC /* MessageView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 712F999F20D6810A003927BC /* MessageView.swift */; };
+		7140B617231A81DC005768A7 /* ReviewRequests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7140B616231A81DC005768A7 /* ReviewRequests.swift */; };
 		714AB65F22DA87FA00A7FBB7 /* DeviceLogsFileEntry.swift in Sources */ = {isa = PBXBuildFile; fileRef = 714AB65E22DA87FA00A7FBB7 /* DeviceLogsFileEntry.swift */; };
 		7155325E2061AFD80025EB75 /* Logger.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7155325D2061AFD80025EB75 /* Logger.swift */; };
 		715E8C3D216566FD0059A2E5 /* Weak.swift in Sources */ = {isa = PBXBuildFile; fileRef = 715E8C3C216566FD0059A2E5 /* Weak.swift */; };
@@ -63,6 +64,7 @@
 		7110B49B2030F17B00EDBFA3 /* DevCleaner.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = DevCleaner.entitlements; sourceTree = "<group>"; };
 		712F999D20D65229003927BC /* Donations.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Donations.swift; sourceTree = "<group>"; };
 		712F999F20D6810A003927BC /* MessageView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MessageView.swift; sourceTree = "<group>"; };
+		7140B616231A81DC005768A7 /* ReviewRequests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReviewRequests.swift; sourceTree = "<group>"; };
 		714AB65E22DA87FA00A7FBB7 /* DeviceLogsFileEntry.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DeviceLogsFileEntry.swift; sourceTree = "<group>"; };
 		7155325D2061AFD80025EB75 /* Logger.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Logger.swift; sourceTree = "<group>"; };
 		715E8C3C216566FD0059A2E5 /* Weak.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Weak.swift; sourceTree = "<group>"; };
@@ -189,6 +191,7 @@
 				7162E12C209905BC00081E4E /* Preferences.swift */,
 				712F999D20D65229003927BC /* Donations.swift */,
 				718D4ABD23140ABA001E9382 /* Files.swift */,
+				7140B616231A81DC005768A7 /* ReviewRequests.swift */,
 			);
 			path = Managers;
 			sourceTree = "<group>";
@@ -417,6 +420,7 @@
 				7155325E2061AFD80025EB75 /* Logger.swift in Sources */,
 				71FD37D7206AD6BE0042812D /* ArchiveFileEntry.swift in Sources */,
 				71C8ACE020A62B8000E7A13B /* ScanReminders.swift in Sources */,
+				7140B617231A81DC005768A7 /* ReviewRequests.swift in Sources */,
 				7100BEE222F6E771002E82B2 /* Signposts.swift in Sources */,
 				716667D0221A26BA004D4FC4 /* FileManager+HomeFolder.swift in Sources */,
 				718D4ABE23140ABA001E9382 /* Files.swift in Sources */,
diff --git a/DevCleaner/Managers/Preferences.swift b/DevCleaner/Managers/Preferences.swift
index f2bbbda..39cd859 100644
--- a/DevCleaner/Managers/Preferences.swift
+++ b/DevCleaner/Managers/Preferences.swift
@@ -33,6 +33,7 @@ public final class Preferences {
         public static let notificationsPeriod = "DCNotificationsPeriodKey"
         public static let dryRunEnabled = "DCDryRunEnabledKey"
         public static let totalBytesCleaned = "DCTotalBytesCleaned"
+        public static let cleansSinceLastReview = "DCCleansSinceLastReview"
         public static let customArchivesFolder = "DCCustomArchivesFolderKey"
         public static let customDerivedDataFolder = "DCCustomDerivedDataFolderKey"
         public static let appFolder = "DCAppFolder"
@@ -157,6 +158,23 @@ public final class Preferences {
         }
     }
     
+    public var cleansSinceLastReview: Int {
+        get {
+            if let value = UserDefaults.standard.object(forKey: Keys.cleansSinceLastReview) as? NSNumber {
+                return value.intValue
+            }
+            
+            return 0
+        }
+        
+        set {
+            let numberValue = NSNumber(value: newValue)
+            UserDefaults.standard.set(numberValue, forKey: Keys.cleansSinceLastReview)
+            
+            self.informAllObserversAboutChange(keyThatChanged: Keys.cleansSinceLastReview)
+        }
+    }
+    
     public var customArchivesFolder: URL? {
         get {
             if let archivesPath = UserDefaults.standard.object(forKey: Keys.customArchivesFolder) as? String {
diff --git a/DevCleaner/Managers/ReviewRequests.swift b/DevCleaner/Managers/ReviewRequests.swift
new file mode 100644
index 0000000..5aebabc
--- /dev/null
+++ b/DevCleaner/Managers/ReviewRequests.swift
@@ -0,0 +1,35 @@
+//
+//  ReviewRequests.swift
+//  DevCleaner
+//
+//  Created by Konrad Kołakowski on 31/08/2019.
+//  Copyright © 2019 One Minute Games. All rights reserved.
+//
+
+import Foundation
+import StoreKit
+
+public final class ReviewRequests {
+    // MARK: Properties
+    public static let shared = ReviewRequests()
+    
+    // MARK: Constants
+    private static let bytesNeededForReviewRequest: Int64 = 20 * 1024 * 1024 * 1024 // 20GB
+    private static let cleansNeededForReviewRequest = 3
+    
+    // MARK: Showing review request
+    public func requestReviewIfNeeded() {
+        let totalBytesCleaned = Preferences.shared.totalBytesCleaned
+        let totalCleansPerformedSinceLastRequest = Preferences.shared.cleansSinceLastReview
+        
+        // desired rules:
+        // we show it either if we passed TOTAL of 20GB of cleaned bytes, which may be even on the first run of the app
+        // or, if we clean smaller amounts, after 3 cleans
+        // after we pass those 20GB total cleaned amount, we ask everytime we clean basically
+        if totalBytesCleaned > ReviewRequests.bytesNeededForReviewRequest || totalCleansPerformedSinceLastRequest >= ReviewRequests.cleansNeededForReviewRequest {
+            SKStoreReviewController.requestReview()
+            
+            Preferences.shared.cleansSinceLastReview = 0
+        }
+    }
+}