i swear i keep discovering a new grocery app every couple months! right now i am up to 9--yep it takes a few minutes to ensure i do all my scanning, checking in, and pic taking at the end of a shopping trip but every little bit adds up and when you are using 9 apps--it can add up quite quickly!
Snap by Groupon: not a big earner, items seem a bit random and uncommon. still worth a look though, especially if you buy magazines.
Ibotta: i am late to this party and i know i only scratch the surface of its earnings potential. many places to earn outside grocery stores like pet stores and even online sites. if you use my referral code, ezl4q, you will earn a bonus $1! there is a lot going on here--i keep it simple but i know i am only scratching the surface of this app's earning potential.