Checkout Boost: Rules & Upsell vs CheckoutPro Upsell Customizer
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 3, 2026 for Checkout Boost, Jun 3, 2026 for CheckoutPro Upsell Customizer.
The short answer
- Only Checkout Boost lists a free plan.
- CheckoutPro Upsell Customizer lists 5 features Checkout Boost’s listing doesn’t mention, including Custom CSS, Custom HTML, Pop-ups.
Head to head
- United States
- Australia
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Starter
- · All checkout pages
- · Compatible with Shopify Plus stores only
- · Delivery option: Hide, Rename, Reorder
- · Dev store access free
- · Payment method: Hide, Rename, Reorder
- · Unlimited static content blocks
Plus
- · All Starter features
- · BXGY & free gift automation
- · Checkout validation
- · Conditional content blocks
- · Post purchase & checkout upsell
- · Rule based discount codes
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCheckoutBoost is the ultimate checkout customization app for upsells, post-purchase one-click offers, cross-sells & checkout blocks. Build checkout UI extensions with a no-code drag-and-drop editor powered by checkout extensibility. Apply 60+ smart conditions based on cart value, product tags, collections, customer segments & geography. Automate discounts code, BXGY deals & free gift rules.
Checkout Editor helps merchants customize and optimize their checkout experience with powerful conversion-focused features. Add quantity editors, product upsells, Trustpilot reviews, trust badges, shipping insurance, countdown timers, and more directly into checkout.
- No-Code simple drag-and-drop checkout editor
- Global conditions engine for cart value, tags, customer attributes & more
- Build your own content checkout extension with text, banner, button and more
- Customizable upsell, form, content, and promotional checkout blocks
- Add upsells and cross-sells directly inside checkout
- Show Trustpilot reviews to build trust and increase sales
- Add checkout timers to reduce cart abandonment
- Offer shipping insurance for higher customer confidence
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 |  Checkout Boost |  CheckoutPro Upsell Customizer |
|---|---|---|
| Detected stores | 47 | 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 | Apparel & Accessories, Food, Beverages & Tobacco, Sporting Goods | Not published |
| Top store countries | United States, Australia, United Kingdom | Not published |
Reviews
| Measure | Checkout Boost | CheckoutPro Upsell Customizer |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 10 | 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 | Checkout Boost | CheckoutPro Upsell Customizer |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $49/month | No monthly plan listed |
| Longest free trial | 30 days | Not listed |
| Plans listed | 2 | Not published |
Listing
| Measure | Checkout Boost | CheckoutPro Upsell Customizer |
|---|---|---|
| Shopify category rank | #102 | #631 |
| Shopify App Charts | #12 in Checkout - Other | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Apr 19, 2024 | May 15, 2026 |
| Languages | 1 | 1 |
| Developer | Checkout Boost | Zoww Apps |
FAQ
Checkout Boost and CheckoutPro Upsell Customizer: common questions
- Is Checkout Boost or CheckoutPro Upsell Customizer cheaper?
- Only Checkout Boost lists a free plan. 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?
- Checkout Boost lists 3 the others don’t mention, such as AI recommendations, Product add-ons, Product recommendations. CheckoutPro Upsell Customizer lists 5 the others don’t mention, such as Custom CSS, Custom HTML, Pop-ups, Product page upsell. 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 3, 2026 for Checkout Boost, Jun 3, 2026 for CheckoutPro Upsell Customizer; 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 3, 2026 for Checkout Boost, Jun 3, 2026 for CheckoutPro Upsell Customizer. 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.