Launched this week
CartHappy
Splits your grocery cart across stores, automatically
27 followers
Splits your grocery cart across stores, automatically
27 followers
Most grocery apps show you deals inside one store. CartHappy compares 350M prices a day across 10,000 stores, auto-applies every coupon, and splits your cart to whatever's cheapest that week. It can also learn your regular list and build your cart automatically — WXYZ Detroit tested it live on TV, saving a family $28 instantly. We built ours as an extension because it works horizontally, sitting inside each retailer's environment while helping the shopper shop across stores, not locked into one.
Hey PH 👋
I built CartHappy for my mom. She's in metro Detroit, and every week she's doing the same thing — checking flyers, clipping coupons, trying to find which store has eggs cheaper this week. I watched her do this for years and never saw a real fix that didn't ask her to change how she shops.
So we built CartHappy to do that work for her and others (nationwide now), automatically. Connect your store accounts, and it checks 350 million prices a day across 10,000 stores in the US, applies every coupon it finds, and splits your cart to whatever's cheapest that week. It can also learn your regular list from what you buy and build a cart on its own.
The harder problem was everyone building their own version of this locked inside one retailer, but nobody shops in just one store — my mom doesn't, and neither does anyone else. Doing this across retailers meant matching the same product across completely different catalogs, pricing systems, and coupon structures in real time — no shared source of truth to pull from. So the approach had to change: build it as an extension that works horizontally, sitting inside each retailer's site instead of replacing it.
WXYZ Detroit tested it live on TV a few weeks ago — a family synced their purchase history and CartHappy found them $28 in savings, instantly. That's the same thing my mom sees now every week.
It's live across Walmart, Target, Kroger (and its family of companies), and Safeway — we're working on adding more. Would love feedback from this community, especially on what would make it more useful week to week.
Thank you!
John
Grok Button
@jlaramie congrats! a novel idea in browser extension land!
@niyogi thank you! try it out and let me know what you think! https://www.carthappy.com/chrome
honestly love the cart splitting idea, super smart. one thing i'd want though is some kind of delivery coordination, like if the cheapest cart ends up split across three different stores, it would be nice if the extension could either schedule pickups or show me a single delivery option that consolidates everything so i'm not driving all over town on a tuesday evening
@neriman91088467 totally. it's planned in two releases...we'll automatically coordinate across the retailers the available pickup / delivery windows, select them in the best group, and consolidate into the shortest window!
@neriman91088467 how many stores do you usually shop at each week? and what would be your top 3?
Can you tell me what retailers you plan to add next? And, are you able to provide any of the back end data directly to brands or retailers?
@joe_parrish2 - we're looking closely at the others in the top 10; from Ahold to Aldi to Wakefern and then some key regional players like a Wegmans and Meijer.
In terms of the data, we're starting to engage with several inbound b2b inquiries looking to understand and track pricing, competitor products, etc.
honestly this looks super useful, the cross-store cart split is clever. one thing i'd love though is a price drop alert for items on my regular list, like if the chicken i buy every week goes on sale at aldi, just ping me so i can wait or stock up
@ozdenoglu41658 Love it - that's super straightforward to implement. Happy to do it. Thank you!
@ozdenoglu41658 how many stores do you usually shop at each week? and what would be your top 3?
Tried it on my usual Walmart run and it actually flagged a cheaper version of my coffee at Kroger, plus stacked a coupon I never would have found. The browser extension feels invisible in a good way.
@sefa3n8y woohoo - love it! thank you!
One thing I'd love to see is a shared family list mode, where my partner and I can both add items in real time and CartHappy splits the cart between stores based on whoever is shopping that day. That would make the auto-cart feature way more useful for households that don't always shop together.
@glhanbinatwoef you got it - we'll look into it. thank you!
@glhanbinatwoef how many stores do you usually shop at each week? and what would be your top 3?
Installed it this morning and the auto-split cart found cheaper stuff for half my list at different stores without me even searching. The coupon auto-apply is the part that genuinely surprised me, saved me about $19 on my usual run.
@cemale66l that's so so awesome to hear. thank you! keep using it please and let us know any ideas / feedback you have!! let's go!