Casper ‑ Cart Sync

Develop by Shopify

$15-$35

/ Month

Built for Shopify

Free plan available 5 Days Free Trial

Increase sales by keeping customers' carts on all devices

Track and sync

Detailed history logs

Month-long cart retention

Seamless cart sync

Effortless integration

Persistent cart

About Casper ‑ Cart Sync

Launched Jun 27, 2022

Built by Shopify

Address

114 W. 17th Street, New York, NY, 10011, US

Website Support Portal Privacy policy Tutorial FAQ Document

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Description

Keep carts synced across devices for logged-in customers, no more lost carts, no more lost sales.

Casper keeps shopping carts synced for logged-in customers, across all devices. Each cart is saved automatically and stays available for 30 days, even if the customer switches devices. This helps reduce cart abandonment and improve conversion, without popups or manual sync. Once it’s running, you’ll forget it’s there, but your customers will always find their cart, ready to buy.

Keep customer carts synced across all devices
Automatically save cart changes in real time
Keep a detailed history of each customer’s cart activity
No pop-ups, no setup. Casper runs quietly in the background
Turn saved carts into draft orders in seconds

Pros

Increases sales by keeping customers' carts synced across all devices
Enhances shopping experience with a persistent cart, contributing to smoother shopping journeys
Ideal for merchants of any size, from small shops to large wholesale operations
Boosts conversion rates and builds customer loyalty
Tracks and syncs carts across devices with detailed history logs
Extends cart retention to a month, surpassing Shopify's 15-day limit
Seamless integration with store themes
Effortless activation with just a few clicks

Top Helpful Reviews

Black Lapel

Nov 05, 2025 on Shopify

So far, not only is this app incredibly helpful, well designed, and easy to use, but support from Clément has been the fastest of any app we've installed to this point. If your business relies on a persistent cart, this is the app for you.

Luxclusif

Oct 29, 2025 on Shopify

I highly recommend the app. It also has great support, Clément is very quick to answer our questions, help us, consider suggestions for the roadmap, and implement them. We are very pleased with Casper.

Estes Wholesale

Oct 27, 2025 on Shopify

This app is the perfect solution for our customers who are placing large orders and spending several days building their cart over multiple devices. I had a few questions and Clément was very helpful and responsive in addressing those. Thank you!

Pierre Belvédère

Jun 17, 2025 on Shopify

The app works really good! We suffered an incovenience and the customer support solve that really quickly! improving also their application. We are really happy that we can offer a better experience for our customers.

AvafinaPet

Jun 11, 2025 on Shopify

App is working well - I had a little hiccup but I reached out to customer service and they replied in under a day, and were able to help out. Very friendly service- Definitely recommend.

Nash Trade (Euro)

Jun 04, 2025 on Shopify

This app is a game-changer - well-priced, incredibly effective, and solves a major shortcoming in Shopify’s native functionality. Since implementing it, we've seen a significant boost in customer satisfaction. Clément is highly responsive and has even implemented new features based on our feedback. Couldn't recommend it more - truly a 10/10 experience!

Coast Direct

Mar 21, 2025 on Shopify

Pooff just like that, carts were disappearing. Can you imagine Shopify tokenizes carts and doesn’t sync them across accounts? I know it’s hard to believe. In comes Casper, and without any issues, it just works. Carts are now synced effortlessly between devices for our logged in users. Definitely recommend.

Country Life

Jan 28, 2025 on Shopify

Nice app, working as expected. Plus, we received quick and helpful support when dealing with a problem specific to used theme (Trade theme). Thanks Clément, nice work

Eaata.pro

Nov 13, 2024 on Shopify

I had an issue and I received a fast and good answer, even a follow-up of the situation till they solve it. Thanks Clement

Platanomelón

Jul 25, 2024 on Shopify

A simple yet effective app for a very much needed feature that Shopify lacks, and keeps belittling as of today. Clément offered outstanding support and event took our feedback to improve the app, something bigger App developers usually don't do. A must have for any store in my opinion, from small to Plus ones.

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