diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index ba20b793..b793156a 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -67,6 +67,9 @@ class ApplicationController < ActionController::Base
     return unless request.headers['X-Dawarich-Client']
 
     session[:dawarich_client] = request.headers['X-Dawarich-Client']
+
+    # Force HTML format for iOS clients to ensure proper authentication flow
+    request.format = :html if request.headers['X-Dawarich-Client'] == 'ios'
   end
 
   def user_not_authorized