diff --git a/Linphone.xcodeproj/project.pbxproj b/Linphone.xcodeproj/project.pbxproj
index 6b2d2faa9..849a2ef13 100644
--- a/Linphone.xcodeproj/project.pbxproj
+++ b/Linphone.xcodeproj/project.pbxproj
@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		66C491F92B24D25B00CEA16D /* ConfigExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 66C491F82B24D25A00CEA16D /* ConfigExtension.swift */; };
+		66C491FB2B24D32600CEA16D /* CoreExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 66C491FA2B24D32600CEA16D /* CoreExtension.swift */; };
 		D706BA822ADD72D100278F45 /* DeviceRotationViewModifier.swift in Sources */ = {isa = PBXBuildFile; fileRef = D706BA812ADD72D100278F45 /* DeviceRotationViewModifier.swift */; };
 		D70C93DE2AC2D0F60063CA3B /* Localizable.xcstrings in Resources */ = {isa = PBXBuildFile; fileRef = D70C93DD2AC2D0F60063CA3B /* Localizable.xcstrings */; };
 		D717071E2AC5922E0037746F /* ColorExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = D717071D2AC5922E0037746F /* ColorExtension.swift */; };
@@ -88,6 +89,7 @@
 
 /* Begin PBXFileReference section */
 		66C491F82B24D25A00CEA16D /* ConfigExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ConfigExtension.swift; sourceTree = "<group>"; };
+		66C491FA2B24D32600CEA16D /* CoreExtension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CoreExtension.swift; sourceTree = "<group>"; };
 		D706BA812ADD72D100278F45 /* DeviceRotationViewModifier.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DeviceRotationViewModifier.swift; sourceTree = "<group>"; };
 		D70C93DD2AC2D0F60063CA3B /* Localizable.xcstrings */ = {isa = PBXFileReference; lastKnownFileType = text.json.xcstrings; path = Localizable.xcstrings; sourceTree = "<group>"; };
 		D717071D2AC5922E0037746F /* ColorExtension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ColorExtension.swift; sourceTree = "<group>"; };
@@ -283,6 +285,7 @@
 			isa = PBXGroup;
 			children = (
 				D719ABC82ABC6FD700B41C10 /* CoreContext.swift */,
+				66C491FA2B24D32600CEA16D /* CoreExtension.swift */,
 			);
 			path = Core;
 			sourceTree = "<group>";
@@ -627,6 +630,7 @@
 				D7C48DF62AFCDF4700D938CB /* ContactInnerActionsFragment.swift in Sources */,
 				D72343322ACEFF58009AA24E /* QRScannerController.swift in Sources */,
 				D72343342ACEFFC3009AA24E /* QRScanner.swift in Sources */,
+				66C491FB2B24D32600CEA16D /* CoreExtension.swift in Sources */,
 				D726E43D2B19E4FE0083C415 /* StartCallFragment.swift in Sources */,
 				D72343302ACEFEF8009AA24E /* QrCodeScannerFragment.swift in Sources */,
 				D726E43F2B19E56F0083C415 /* StartCallViewModel.swift in Sources */,
diff --git a/Linphone/Core/CoreExtension.swift b/Linphone/Core/CoreExtension.swift
new file mode 100644
index 000000000..0b0b9f94c
--- /dev/null
+++ b/Linphone/Core/CoreExtension.swift
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2010-2023 Belledonne Communications SARL.
+ *
+ * This file is part of linphone
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+
+
+// Core Extension provides a set of utilies to manage automatically a LinphoneCore no matter if it is from App or an extension.
+// It is based on a singleton pattern and adds.
+
+import UIKit
+import linphonesw
+
+struct CoreError: Error {
+	let message: String
+	init(_ message: String) {
+		self.message = message
+	}
+	public var localizedDescription: String {
+		return message
+	}
+}
+
+extension Core {
+	
+	public static func runsInsideExtension() -> Bool { // Tells wether it is run inside app extension or the main app.
+		let bundleUrl: URL = Bundle.main.bundleURL
+		let bundlePathExtension: String = bundleUrl.pathExtension
+		return bundlePathExtension == "appex"
+	}
+	
+}
+