Try MOTIS (Mobile Object Tracking Item System)

Guide Add Customer

add customer screen
As the Admin you can login to the MotisAdmin Admin Portal and there enter the details of all the companies that you service. You can fill out this form for each company. You must have at least one customer. The fields you must fill out are: Company Name, Email address, Username and Password. Your customer can then login and view their specific items. Click save when done.