Casper ‑ Persistent Cart Sync

Save and sync a persistent cart across all devices

by Outis · Launched: June 2022 · Free plan available.

4.7 (27) on Shopify Used by 48 Shopify stores Built for Shopify

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Sync and save every customer's cart across devices. Fewer abandoned carts, more recovered sales.

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About Casper ‑ Persistent Cart Sync

Customers add to cart on one device, then buy on another. Casper saves and syncs each logged-in customer's cart across all their devices, mobile or desktop, so a persistent cart stays ready for 90 days. This cross-device cart sync cuts abandoned carts and drives automatic cart recovery, with no pop-ups, no restore button and no setup. Track cart history and cart insights to spot buying intent. For wholesale and B2B stores, turn any large saved cart into a draft order in one click. Cart sync follows each customer across phone, tablet and desktop Every cart is saved automatically and stays live for 90 days Automatic cart recovery and fewer abandoned carts, no pop-ups or setup See cart history and cart insights to spot buying intent Wholesale and B2B ready: turn large saved carts into draft orders in a click Show more Show less

Last verified: July 15, 2026 · Fresh

App details

Developer: Outis
Category: Marketing & conversion
Pricing: Free plan available
Launched: June 2022
Rating: 4.7 (27) on Shopify

Key features

Free for dev & staging, on request
‌Sync carts across all devices
Save carts for logged-in customers
No cart limits
Save carts for up to 90 days

Integrations with:

Shopify Admin

3 plans · starts free · 5-day free trial

Dev & Staging

Free

Standard

$15/month

Shopify Plus

$35/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 29 Shopify App Store reviews

Use the arrows to read individual reviews

Casper nous sauve des ventes ! Appli fiable et très efficace. Je recommande vivement, et le support est très professionnel et réactif

— Bohm B2B

As a B2B company, we wanted shopping carts to be saved for 90 days instead of 30 days. We submitted a request to Casper, and after 5 days we received confirmation that this had been implemented. Our customers, who sometimes take several days to complete an order, are very satisfied that they can now continue working on their order across different devices.

— Mani Bhadra BV - Phoenix Import

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— Boon Books Wholesale

We consistently have an excellent experience with this app’s support team. Anytime we run into an issue or have a question, we receive a response almost immediately. Every concern is resolved or answered within one business day without fail. Truly outstanding service and support—we couldn’t ask for better!

— Lawson Products

Responsive developer. Product works well and fills our needs.

— Koch & Co Pty Ltd

This app has been great for our store! Our sales team loves the ability to review and edit carts for their accounts. Clement is also super helpful and speedy with helping to fix issues. (we have only had 1 issue). Highly recommend this app!

— Retrospec

Excellent and prompt customerr service.

— Siesta Crafts

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.

— Black Lapel

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.

— Luxclusif

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!

— Estes Wholesale

Works as advertised on the box and the developer is responsive!

— Roveba

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— Istanbul Fashion Center

não funcionou e fui cobrado

— Mooui

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.

— Pierre Belvédère

Je recommande l'application cela permet de convertir mieux

— Almé

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.

— AvafinaPet

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!

— Nash Trade (Euro)

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.

— Coast Direct

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

— Country Life