ReferralMaker does not synchronize with the native Contacts and Calendar applications on your smart phone. Instead. Referral Maker offers a dedicated application. This approach is unpopular, due to the glitchy behavior of the app. A modern real estate CRM like RealtyJuggler Real Estate CRM synchronizes with the native Contacts and Calendar on your smart phone. This approach allows you to edit and view your database using the rock-solid smart phone applications that you already use.