We gave you services to develop a website or mobile app.Technically no error will occur when i handover project to you.If you want to see I will send you link of some websites or app references those our company developed.I am available for my clients anytime.If you have query you can contact me anytime. My Expertise(6+years experienced): Technical Expertise: -->PHP -->Magento -->Wordpress -->Drupal -->Programming in Android,IOS.