Free Persistent Cart ‑ Relay vs Cart Syncify: Cart Sync Easily
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for Free Persistent Cart, Oct 7, 2026 for Cart Syncify.
The short answer
- Cart Syncify lists 1 features Free Persistent Cart’s listing doesn’t mention, including Conversion tracking.
Head to head
- France
- India
- Japan
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureShoppers browse on a phone and buy on a laptop. Cart Relay saves a signed-in customer's cart against their customer account and puts it back when they sign in on another device. No link to click, no code to enter. If the second device already has a cart, the two are combined: quantities of shared items add up and no line is dropped.
Cart Syncify saves a customer's cart to their Shopify account, then restores it on any device, browser, or tab so carts never vanish between mobile and desktop. It also gives you a live analytics dashboard: recovery rate, abandoned products, cart value, peak hours, and time-to-purchase. Note: This is cross-device cart sync + analytics not an email or SMS recovery tool.
- Unlimited cart syncs between phones, laptops and browsers
- Setup is one theme app embed — no code, and nothing to configure
- Two carts merge automatically: quantities add up, no line is dropped
- Sign-out clears the cart from that browser and restores it at next sign-in
- Restores customer shopping carts across mobile and desktop devices
- Tracks the exact revenue recovered from your cross-device shoppers.
- Get the analytics when is the most customers active in your store.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Free Persistent Cart |  Cart Syncify |
|---|---|---|
| Detected stores | 8 | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Home & Garden, Apparel & Accessories, Electronics | Not published |
| Top store countries | France, India, Japan | Not published |
Reviews
| Measure | Free Persistent Cart | Cart Syncify |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 4 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Free Persistent Cart | Cart Syncify |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | Not published | Not published |
Listing
| Measure | Free Persistent Cart | Cart Syncify |
|---|---|---|
| Shopify category rank | #64 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Aug 27, 2026 | May 11, 2026 |
| Languages | 1 | 1 |
| Developer | Flywheel Systems | The Solo Developer |
FAQ
Free Persistent Cart and Cart Syncify: common questions
- What features does each app list that the other doesn’t?
- Cart Syncify lists 1 the others don’t mention, such as Conversion tracking. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 8, 2026 for Free Persistent Cart, Oct 7, 2026 for Cart Syncify; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 8, 2026 for Free Persistent Cart, Oct 7, 2026 for Cart Syncify. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.