The advantages of online food order/delivery are many compared to phone call. 

1. You won’t be wasting your credit telling the vendor what you’d like to eat and how you’d want it delivered to you. (The vendor will be properly informed about your order, such as Diet Coke instead of coke or zobo instead of foster clark).
2. The mere fact that you are ordering online, you ll be protected from human error (maybe poor network or mixed order).
3. Since you can add multiple addresses, you can send food to loved ones with the hassle of calling the delivery guy to see whether he has arrived or not.
4. With less that 6 clicks you can order for your favorite picnic dishes and will be delivered to you right on time.   

Simply because, Chopsmobile need your email and phone number to notify about any emergency . In the case where a restaurant ran out of what you want you need to know and maybe Chopsmobile will suggest another place with similar quality.

You can register on Chopsmobile completely free, however, for a vendor there are process of verification which every vendor has to undergo.