CartStar Slide Cart & Upsell vs Rocket: Checkout Upsells
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026.
The short answer
- Paid plans start at $5/month for CartStar Slide Cart & Upsell and $9.99/month for Rocket.
- CartStar Slide Cart & Upsell lists 9 features Rocket’s listing doesn’t mention, including Announcements, Automatic discounts, Buy more, save more.
Head to head
Basic
- · Every feature included
- · Free gift & discount tiers
- · Full design control
- · Post-purchase upsell offers
- · Product recommendations
- · Revenue reports
Starter
- · Every feature included
- · Free gift & discount tiers
- · Full design control
- · Post-purchase upsell offers
- · Product recommendations
- · Revenue reports
Growth
- · Every feature included
- · Free gift & discount tiers
- · Full design control
- · Post-purchase upsell offers
- · Product recommendations
- · Revenue reports
Scale
- · Every feature included
- · Free gift & discount tiers
- · Full design control
- · Post-purchase upsell offers
- · Product recommendations
- · Revenue reports
Basic
- · 14-day free trial
- · Free shipping progress bar
- · Manual product recommendations
- · Trust badges in checkout
Pro
- · 14-day free trial
- · Best-selling product recommendations
- · Everything in Basic
- · Full analytics dashboard
- · Recently-viewed product recommendations
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartStar replaces your theme's cart with a slide-out drawer: recommendations, a progress bar toward free shipping, free gift, and discounts. Gifts run on a Shopify Function, so nobody reaches the threshold by adding the gift itself. After checkout, one more offer can charge the same card, so what a shopper accepts joins the order they just placed.
Rocket Checkout Upsells adds three widgets directly to your checkout: product recommendations, a shipping progress bar, and trust badges. Merchants can choose between manual product selection, top-selling products, or recently viewed items. Analytics show impressions, clicks, and top-performing products. All widgets are configured in the app and displayed natively in checkout — no coding required
- Slide-out cart drawer that replaces your theme cart, or works alongside it
- Progress bar toward free shipping, gift or a percentage off
- Product recommendations drawn from what your customers buy together
- Post-purchase upsell that adds to the order a shopper has already paid for
- Product recommendations — manual, top-selling, or recently viewed
- Shipping progress bar showing customers how close they are to a threshold
- Trust badges displayed above the payment button to reduce checkout hesitation
- Analytics with impressions, clicks, and top-performing recommended products
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 |  CartStar Slide Cart & Upsell |  Rocket |
|---|---|---|
| Detected stores | Not published | 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 | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | CartStar Slide Cart & Upsell | Rocket |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 2 | 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 | CartStar Slide Cart & Upsell | Rocket |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $5/month(ahead) | $9.99/month |
| Longest free trial | 7 days | 14 days |
| Plans listed | 4 | 2 |
Listing
| Measure | CartStar Slide Cart & Upsell | Rocket |
|---|---|---|
| Shopify category rank | #194(ahead) | #455 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Aug 28, 2026 | Jul 13, 2026 |
| Languages | 1 | 1 |
| Developer | Appify Market | Rocket Launchpad |
FAQ
CartStar Slide Cart & Upsell and Rocket: common questions
- Is CartStar Slide Cart & Upsell or Rocket cheaper?
- Paid plans start at $5/month for CartStar Slide Cart & Upsell and $9.99/month for Rocket. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- CartStar Slide Cart & Upsell lists 9 the others don’t mention, such as Announcements, Automatic discounts, Buy more, save more, Cart drawer. 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 Oct 13, 2026; 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 Oct 13, 2026. 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.