diff --git a/src/App/Resources/AppResources.Designer.cs b/src/App/Resources/AppResources.Designer.cs
index 20aeb4a19..51a6cfb8c 100644
--- a/src/App/Resources/AppResources.Designer.cs
+++ b/src/App/Resources/AppResources.Designer.cs
@@ -6434,6 +6434,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Unlocking may fail due to insufficient memory. Decrease your KDF memory settings to resolve.
+        /// </summary>
+        public static string UnlockingMayFailDueToInsufficientMemoryDecreaseYourKDFMemorySettingsToResolve {
+            get {
+                return ResourceManager.GetString("UnlockingMayFailDueToInsufficientMemoryDecreaseYourKDFMemorySettingsToResolve", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Unlock vault.
         /// </summary>
diff --git a/src/App/Resources/AppResources.resx b/src/App/Resources/AppResources.resx
index a137e2384..f4bae0727 100644
--- a/src/App/Resources/AppResources.resx
+++ b/src/App/Resources/AppResources.resx
@@ -2634,4 +2634,7 @@ Do you want to switch to this account?</value>
   <data name="MasterPasswordRePromptHelp" xml:space="preserve">
     <value>Master password re-prompt help</value>
   </data>
+  <data name="UnlockingMayFailDueToInsufficientMemoryDecreaseYourKDFMemorySettingsToResolve" xml:space="preserve">
+    <value>Unlocking may fail due to insufficient memory. Decrease your KDF memory settings to resolve</value>
+  </data>
 </root>
diff --git a/src/iOS.Core/Constants.cs b/src/iOS.Core/Constants.cs
index 402988dd7..1c9896ec1 100644
--- a/src/iOS.Core/Constants.cs
+++ b/src/iOS.Core/Constants.cs
@@ -32,5 +32,6 @@
         public const string UTTypeAppExtensionImage = "public.image";
 
         public const string AutofillNeedsIdentityReplacementKey = "autofillNeedsIdentityReplacement";
+        public const int MaximumArgon2IdMemoryBeforeExtensionCrashing = 48;
     }
 }
diff --git a/src/iOS.Core/Controllers/BaseLockPasswordViewController.cs b/src/iOS.Core/Controllers/BaseLockPasswordViewController.cs
index 855581b4b..db0a946c2 100644
--- a/src/iOS.Core/Controllers/BaseLockPasswordViewController.cs
+++ b/src/iOS.Core/Controllers/BaseLockPasswordViewController.cs
@@ -225,6 +225,18 @@ namespace Bit.iOS.Core.Controllers
             var kdfConfig = await _stateService.GetActiveUserCustomDataAsync(a => new KdfConfig(a?.Profile));
             var inputtedValue = MasterPasswordCell.TextField.Text;
 
+            // HACK: iOS extensions have constrained memory, given how it works Argon2Id, it's likely to crash
+            // the extension depending on the argon2id memory configured.
+            // So, we warn the user and advise to decrease the configured memory letting them the option to continue, if wanted.
+            if (kdfConfig.Type == KdfType.Argon2id
+                &&
+                kdfConfig.Memory > Constants.MaximumArgon2IdMemoryBeforeExtensionCrashing
+                &&
+                !await _platformUtilsService.ShowDialogAsync(AppResources.UnlockingMayFailDueToInsufficientMemoryDecreaseYourKDFMemorySettingsToResolve, AppResources.Warning, AppResources.Continue, AppResources.Cancel))
+            {
+                return;
+            }
+
             if (_pinLock)
             {
                 var failed = true;