diff --git a/iOS/app/MMMemory.xcodeproj/project.pbxproj b/iOS/app/MMMemory.xcodeproj/project.pbxproj
index cf84228..f27b9e8 100644
--- a/iOS/app/MMMemory.xcodeproj/project.pbxproj
+++ b/iOS/app/MMMemory.xcodeproj/project.pbxproj
@@ -11,6 +11,7 @@
 		3D03666F3BC2B1F2CBB49530 /* Main.SectionSelection.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6D5F2B2E3A26F03F6825608E /* Main.SectionSelection.swift */; };
 		79FB208C9DADDA6179E588C3 /* Main.SectionGrid.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9AC22F19366076CF4168BFBD /* Main.SectionGrid.swift */; };
 		89086E3972F560A9A1A76CE4 /* Model.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9C71EDBDFFDBC96F6E8E7762 /* Model.swift */; };
+		A8118182ABE97FA935A1A4F9 /* model.iOS.swift in Sources */ = {isa = PBXBuildFile; fileRef = E3A95F2FA5C43AF82C7A97FC /* model.iOS.swift */; };
 		B19B3998FA2BA651ACB1E53C /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = C1742EFC5A1E818780679340 /* Assets.xcassets */; };
 		CAFD870CA84084E45011CC23 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 4E32B0495E4BCEA4EE0508D4 /* LaunchScreen.storyboard */; };
 		D505E64F4CD6EAEB530BF851 /* Main.Section16Buttons.swift in Sources */ = {isa = PBXBuildFile; fileRef = A38A1AA6B57483F6B44CDF78 /* Main.Section16Buttons.swift */; };
@@ -28,10 +29,20 @@
 		A355A898E25602F45B88CCBA /* Main.Platform.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Main.Platform.swift; sourceTree = "<group>"; };
 		A38A1AA6B57483F6B44CDF78 /* Main.Section16Buttons.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Main.Section16Buttons.swift; sourceTree = "<group>"; };
 		C1742EFC5A1E818780679340 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
+		E3A95F2FA5C43AF82C7A97FC /* model.iOS.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = model.iOS.swift; sourceTree = "<group>"; };
 		F16A7DD61EF6CD4FB4E3DE25 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXGroup section */
+		4F93BC5459F4AF4391816D4A /* shared */ = {
+			isa = PBXGroup;
+			children = (
+				E3A95F2FA5C43AF82C7A97FC /* model.iOS.swift */,
+			);
+			name = shared;
+			path = ../../shared;
+			sourceTree = "<group>";
+		};
 		667BC26EA8068A9FA707FC02 /* src */ = {
 			isa = PBXGroup;
 			children = (
@@ -60,6 +71,7 @@
 		CD7F0F0C9CA1BA5EAFD5CA09 = {
 			isa = PBXGroup;
 			children = (
+				4F93BC5459F4AF4391816D4A /* shared */,
 				667BC26EA8068A9FA707FC02 /* src */,
 				AE7B74413EC292E802CC5C70 /* Products */,
 			);
@@ -134,6 +146,7 @@
 				3D03666F3BC2B1F2CBB49530 /* Main.SectionSelection.swift in Sources */,
 				DB1010B8A246D47BEC6B3FA6 /* Main.swift in Sources */,
 				89086E3972F560A9A1A76CE4 /* Model.swift in Sources */,
+				A8118182ABE97FA935A1A4F9 /* model.iOS.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/iOS/app/MMMemory.xcodeproj/project.xcworkspace/xcuserdata/mk.xcuserdatad/UserInterfaceState.xcuserstate b/iOS/app/MMMemory.xcodeproj/project.xcworkspace/xcuserdata/mk.xcuserdatad/UserInterfaceState.xcuserstate
index 5b9881c..0bd332e 100644
Binary files a/iOS/app/MMMemory.xcodeproj/project.xcworkspace/xcuserdata/mk.xcuserdatad/UserInterfaceState.xcuserstate and b/iOS/app/MMMemory.xcodeproj/project.xcworkspace/xcuserdata/mk.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/iOS/app/project.yml b/iOS/app/project.yml
index 01f5e56..4cd13c3 100644
--- a/iOS/app/project.yml
+++ b/iOS/app/project.yml
@@ -8,6 +8,7 @@ targets:
         deploymentTarget: "16.0"
         sources:
             - path: "../src"
+            - path: "../../shared/model.iOS.swift"
         settings:
             base:
                 INFOPLIST_FILE: Info.plist
diff --git a/iOS/src/Main.SectionGrid.swift b/iOS/src/Main.SectionGrid.swift
index 5c89e1d..4f54493 100644
--- a/iOS/src/Main.SectionGrid.swift
+++ b/iOS/src/Main.SectionGrid.swift
@@ -14,10 +14,10 @@ extension Main {
         let btn = core.buttons[id]
         btn.frame =
           CGRect(
-            x: p.0,
-            y: p.1,
-            width: memorySide(),
-            height: memorySide()
+            x: CGFloat(p.0),
+            y: CGFloat(p.1),
+            width: CGFloat(memorySide()),
+            height: CGFloat(memorySide())
           )
         btn.backgroundColor = .blue
       }
diff --git a/iOS/src/Model.swift b/iOS/src/Model.swift
index c7d8cd8..0b64e15 100644
--- a/iOS/src/Model.swift
+++ b/iOS/src/Model.swift
@@ -4,23 +4,11 @@ struct M {
   var itemsCount: Int = 16
 }
 
-func memorySide() -> CGFloat {
-  return 50
-}
-
-func memorySpace() -> CGFloat {
-  return 20
-}
-
-func memoryGap() -> CGFloat {
-  return memorySide() + memorySpace()
-}
-
-func memoryItemPositions(_ M: M) -> [(CGFloat, CGFloat)] {
-  var pos = [(CGFloat, CGFloat)]()
+func memoryItemPositions(_ M: M) -> [(Float, Float)] {
+  var pos = [(Float, Float)]()
   for i in stride(from: 0, to: M.itemsCount, by: 1) {
-    let row = floor(Double(i) / 4)
-    let x = memoryGap() + (Double(i) - row * 4) * memoryGap()
+    let row = floor(Float(i) / 4)
+    let x = memoryGap() + (Float(i) - row * 4) * memoryGap()
     let y = memoryGap() + row * memoryGap()
     pos.append((x, y))
   }
diff --git a/shared/model.iOS.swift b/shared/model.iOS.swift
new file mode 100644
index 0000000..044f484
--- /dev/null
+++ b/shared/model.iOS.swift
@@ -0,0 +1,11 @@
+func memorySide() -> Float {
+  return 50
+}
+
+func memorySpace() -> Float {
+  return 20
+}
+
+func memoryGap() -> Float {
+  return memorySide() + memorySpace()
+}