grocery shopping list

i need to create a grocery shopping form that is quite integrated. it will need to pull from other sources like store comparisons, apply savings codes tally the costs. as a customer begins to type out the name of an item i would like a prediction function that completes the word

Hi sweetiescakes, 

Thanks for contacting us.

For the apply savings code and tally the costs, if I understand it correctly, this are discount coupons and total of the bought products which can be done using Purchase Order tool or other payment tools in JotForm. But unfortunately, for the store comparison and prediction function you want in your form, it needs custom and complex programming to be implemented. 

Do let us know if you need further assistance.

Regards.