CartBoost: Checkout Upsell vs AMP Post Purchase Upsell
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 4, 2026 for CartBoost, Nov 5, 2026 for AMP Post Purchase Upsell.
The short answer
- Both list a free plan. Paid plans start at $9.99/month for CartBoost and $99/month for AMP Post Purchase Upsell.
- AMP Post Purchase Upsell lists 29 features CartBoost’s listing doesn’t mention, including A/B testing, AI recommendations, Announcement bar.
Head to head
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 1-Click checkout order bump
- · Checkout milestone progress bar
- · Native Checkout Extensibility
- · Standard email support
Pro
- · 1-Click post-purchase upsells
- · Multi-tier milestone rewards
- · Priority developer support
- · Unlimited checkout orders
FREE FOREVER
- · A/B Testing to pick best offer
- · Advanced targeting: UTM, repeat visitor
- · Design & branding support
- · SKU & campaign level analytics
- · Smart AI recommendations
- · Unlimited Post Purchase Upsells
PRO
- · All features in FREE plan
- · Checkout page upsells for Shopify Plus
- · Pop-ups on ATC or Checkout button clicks
- · Post purchase surveys and analytics
- · Product Page Upsells
- · Slide cart drawer with upsells
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartBoost helps merchants increase Average Order Value directly within Shopify checkout. Set dynamic milestone reward progress bars for free shipping and gift tiers that update live with cart totals. Offer high-converting 1-click checkout order bumps and post-purchase upsells with zero checkout friction. Built 100% natively on Checkout Extensibility with no theme code injection or slow scripts.
AMP Post Purchase Upsell turns every order into a bigger order. Show a one-click post purchase upsell where buying intent is highest. Add product page upsells and pop-ups, and on Shopify Plus, add checkout upsells with a free-shipping progress bar. Use one-click add-ons, frequently bought together recommendations & cross-sell offers across the journey.
- Checkout progress bar with tiered milestone rewards
- One-click order bumps placed directly inside native checkout
- Post-purchase 1-click upsells displayed right after payment
- Visual checkout customizer block with live admin simulator
- Create Post Purchase One-Click Upsells (single & multi-product)
- Upsell everywhere: Product page, Cart, Thank You page
- Supercharge Checkout page with upsells and social proof (Shopify Plus Exclusive)
- Customize Thank You & Order Status page: Upsells, Surveys & more
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 | AMP Post Purchase Upsell | |
|---|---|---|
| Detected stores | Not published | 522 |
| Net store change, 28 days | 0 | −12 |
| Stores added, 28 days | Not enough data | 4 |
| Big-brand share | Not enough data | 31% |
| Top store categories | Not published | Apparel & Accessories, Health & Beauty, Home & Garden |
| Top store countries | Not published | United States, United Kingdom, Australia |
Reviews
| Measure | AMP Post Purchase Upsell | |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 94 |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | AMP Post Purchase Upsell | |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $9.99/month(ahead) | $99/month |
| Longest free trial | 14 days | 14 days |
| Plans listed | 2 | 2 |
Listing
| Measure | AMP Post Purchase Upsell | |
|---|---|---|
| Shopify category rank | Not enough data | Not enough data |
| Shopify App Charts | Not on this week’s charts | #4 on Big-brand picks in Upsell and cross-sell |
| Built for Shopify | No | No |
| Launched | Nov 4, 2026 | Jul 21, 2023 |
| Languages | 1 | 1 |
| Developer | ModApps | App HQ Pte. Ltd. |
FAQ
CartBoost and AMP Post Purchase Upsell: common questions
- Is CartBoost or AMP Post Purchase Upsell cheaper?
- Both list a free plan. Paid plans start at $9.99/month for CartBoost and $99/month for AMP Post Purchase Upsell. 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?
- CartBoost lists 1 the others don’t mention, such as Priority processing. AMP Post Purchase Upsell lists 29 the others don’t mention, such as A/B testing, AI recommendations, Announcement bar, Bundles. 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 4, 2026 for CartBoost, Nov 5, 2026 for AMP Post Purchase Upsell; 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 4, 2026 for CartBoost, Nov 5, 2026 for AMP Post Purchase Upsell. 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.