Hello, I have seen your project development brief As a certified developer of Zoho Creator, I can offer you the best of my technical expertise using Zoho Creator I can develop applications in zoho creator with integration of other products such as zoho books,zoho crm etc., also Do kindly connect with me through my email: vedavalli@itkeduserv.com. Kindly do revert on the above. Thanks again. Regards, Vedavalli