Fetch Rewards is one of the easiest apps I use to get free giftcards! Just scan all your receipts into the app to keep racking up those points. Once you reach 3000 points = $3 gift card!
Referral Code: J24VT
Be sure to check your bonuses that change weekly and monthly to make sure you are maximizing your points back and sometimes getting FREE Items with 100 % points back.