Shopify · Upsell & cart

SMART Checkout Rules & Upsells review

Ranked 6 of 7 among Shopify upsell & cart drawer apps by merchant reviews.

Best for: Checkout-level rules on top of post-purchase offers.
5.0 (645) Free by SMART
View on the Shopify App Store Compare all 7 upsell & cart drawer apps

Listing data checked 23 August 2026

Strengths and trade-offs

What it does well
  • Free with a 5.0 average
  • Checkout rules go beyond what most upsell apps touch
Trade-offs
  • Some checkout customisation is Shopify Plus only
  • Smaller review base

What "Free" actually means

The listing advertises no paid tier. That is genuinely free rather than a trial, but it also means the vendor earns nothing from your install — worth weighing against how actively the app is likely to be maintained.

Whatever the label says, the calculation is the same: a upsell & cart drawer app has to lift revenue by more than it costs. Our break-even calculator works out the lift you would need against your own orders and margin — for most stores it is a fraction of a percent, which means the subscription is rarely the real question. The payload the app adds to every page load usually is.

Head to head

SMART Checkout Rules & Upsells vs our category pick

How it lines up against Essential Upsell & Cross Sell, which we rank first for upsell & cart drawer apps.

AppRating ReviewsPricingBest for
SMART Checkout Rules & Upsells 5.0 645 Free Checkout-level rules on top of post-purchase offers
Essential Upsell & Cross Sell 5.0 2,231 Free plan available Product-page frequently-bought-together blocks plus post-purchase offers
Alternatives

The closest alternatives to SMART Checkout Rules & Upsells

Every upsell & cart drawer app we index, ranked by the weight of merchant feedback behind it. Which surfaces are covered is usually the axis that decides between them.

AppRating ReviewsPricingBest for
Upsell & Cross Sell — Selleasy 4.9 2,519 Free to install Multi-surface upsells with a well-regarded support team behind them
Essential Upsell & Cross Sell 5.0 2,231 Free plan available Product-page frequently-bought-together blocks plus post-purchase offers
Kaching CartDrawer Cart Upsell 5.0 1,180 Free plan available Replacing the theme cart drawer with an upsell-aware slide cart
Aftersell Post Purchase Upsell 4.8 899 Free plan available Serious post-purchase funnels with branching offer logic
Essent Cart Drawer Cart Upsell 5.0 858 Free A free slide cart with a rewards progress bar

Full upsell & cart drawer ranking with buying criteria

FAQ

SMART Checkout Rules & Upsells: common questions

Is SMART Checkout Rules & Upsells free?
Free on the Shopify App Store. The listing advertises no paid tier. That is genuinely free rather than a trial, but it also means the vendor earns nothing from your install — worth weighing against how actively the app is likely to be maintained.
How well rated is SMART Checkout Rules & Upsells?
5.0 out of 5 from 645 ratings, checked 23 August 2026. That is 7% of merchant reviews across the 7 Shopify upsell & cart drawer apps we index, and 26% of the category leader's total. Ratings in this category cluster tightly between 4.8 and 5.0, so the size of the review base tells you more than the average does.
What are the best alternatives to SMART Checkout Rules & Upsells?
The closest alternatives in the same category are Upsell & Cross Sell — Selleasy, Essential Upsell & Cross Sell, Kaching CartDrawer Cart Upsell. If you want the safest default, Essential Upsell & Cross Sell is our pick for this category.
How we assess apps. Ratings, counts, pricing labels and — where the marketplace publishes one — the vendor name come from the public Shopify App Store listing and carry the date they were checked. The verdict, the "best for" line and the trade-offs are our editorial judgement. We take no money from any vendor listed here — full methodology.