Cart customization apps for Shopify
Who uses each cart customization app, from Alert's storefront scan. Each profile shows where the app's stores are based, what they sell, their Shopify Plus share and the apps they run alongside it.
What cart customization apps do
Cart apps change what happens after a shopper clicks add to cart: a slide-out cart drawer, free shipping progress bars, upsell offers, gifts added automatically and terms checkboxes. For a merchant they raise order value and reduce friction at the step before checkout.
What to compare when choosing
- Cart drawer design and how closely it matches the theme
- Upsell and cross-sell rules inside the cart
- Free shipping bars and tiered rewards
- Automatic gift or add-on rules
- Effect on page speed and compatibility with other cart apps
Cart customization apps side by side
Ratings and plans from the Shopify App Store, November 2026; store shares from Alert's scan.
| App | App Store rating | First paid plan | On Shopify Plus | Median catalog | Outside the US |
|---|---|---|---|---|---|
 Kaching Cart | 5.0 (1,583) | $9.99/mo | ~3% | 15 | 69% |
 Essential Cart | 5.0 (1,156) | n/a | ~4% | 43 | 73% |
 EG | 4.9 (1,148) | n/a | ~30% | 83 | 62% |
 Essential Shipping Bar | 5.0 (989) | n/a | ~6% | 80 | 72% |
 Upcart | – | n/a | ~10% | 38 | 57% |
 RT: | 4.6 (384) | n/a | ~4% | 84 | 74% |
Kaching Cart has the most App Store reviews of the cart customization apps profiled here. Ratings range from 4.6 to 5.0 stars.
The share of stores on Shopify Plus runs from ~3% for Kaching Cart to ~30% for EG, against ~4% across Shopify as a whole.
Median catalog size ranges from 15 products (Kaching Cart) to 84 (RT:).
RT: has the largest share of stores based outside the United States, at 74%.
The largest store category for these apps: business and industrial, fashion.
8.5% of Essential Cart stores also run Essential Shipping Bar, 14.0x the rate across Shopify.
5.7% of Essential Shipping Bar stores also run Essential Cart, 14.0x the rate across Shopify.
The cart customization apps at a glance
Kaching CartDrawer Cart Upsell
Kaching Cart is rated 5.0 stars across 1,583 App Store reviews and has paid plans from $9.99 to $24.99 a month. In Alert's scan, ~3% of its stores run Shopify Plus, the median store lists 15 products, and 69% are based outside the United States. Its largest store category is business and industrial.
Essent Cart Drawer Cart Upsell
Essential Cart is rated 5.0 stars across 1,156 App Store reviews and has listed as freemium (from $8.99/month). In Alert's scan, ~4% of its stores run Shopify Plus, the median store lists 43 products, and 73% are based outside the United States. Its largest store category is fashion.
EG Auto Add to Cart Free Gift
EG is rated 4.9 stars across 1,148 App Store reviews and has listed as freemium (from $14.99/month). In Alert's scan, ~30% of its stores run Shopify Plus, the median store lists 83 products, and 62% are based outside the United States. Its largest store category is business and industrial.
Essential Free Shipping Bar
Essential Shipping Bar is rated 5.0 stars across 989 App Store reviews and has listed as freemium (from $9.99/month). In Alert's scan, ~6% of its stores run Shopify Plus, the median store lists 80 products, and 72% are based outside the United States. Its largest store category is fashion.
Upcart
Upcart has listed as free. In Alert's scan, ~10% of its stores run Shopify Plus, the median store lists 38 products, and 57% are based outside the United States. Its largest store category is fashion.
RT: Terms and Conditions Box
RT: is rated 4.6 stars across 384 App Store reviews and has listed as freemium (from $6.99/month). In Alert's scan, ~4% of its stores run Shopify Plus, the median store lists 84 products, and 74% are based outside the United States. Its largest store category is business and industrial.
Cart customization apps FAQ
Which cart customization app for Shopify has the most reviews?
Of the cart customization apps Alert profiles, Kaching Cart has the most App Store reviews: 1,583, rated 5.0 stars, as of November 2026.
Is there a free cart customization app for Shopify?
None of the cart customization apps Alert profiles lists a free plan as of November 2026. Check each app's listing for a free trial.
Which cart customization app has the most upmarket stores?
Measured by the share of each app's own stores on Shopify Plus, EG ranks highest of the cart customization apps profiled here, at ~30%.
Shares of Shopify stores Alert detected running each app, as of November 2026. App names are trademarks of their owners. Alert is not affiliated with these developers.