Zoorix Sticky Add To Cart Bar vs Square: Sticky Add to Cart Bar: which sticky bar fits your Shopify store?

Sticky add to cart bars are one of the few product page tools that almost every store can justify. On mobile, the theme's own button scrolls out of view after a few swipes through photos and reviews, and the shopper has to scroll back up to buy. A bar pinned to the screen fixes that. If you want the background on why it works and how to set one up, our guide on adding a sticky cart button to Shopify covers it.

The category is crowded, and the big names get most of the attention. This page looks at two smaller apps that both hold a perfect 5.0 rating but have very little written about them: Zoorix Sticky Add To Cart Bar and Square: Sticky Add to Cart Bar. All facts below come from their App Store listings and their own help centers, checked on 6 November 2026. Where something is not documented, we say so instead of guessing.

Who makes these two apps

Zoorix Sticky Add To Cart Bar

Zoorix is a developer based in Tel Aviv. The sticky bar app launched on the Shopify App Store on 18 March 2022 and had 205 reviews at a 5.0 average when we checked. Zoorix also publishes other conversion apps, and you can see that background in how the sticky bar is built: it talks to cart drawers and bundle apps rather than living on its own.

The positioning is clear from the listing. It promises an always visible button, a Fast Checkout that sends the customer straight to checkout in one click, and support for multi-currency and multi-language stores. The paid Premium plan pushes the bar beyond product pages.

Square: Sticky Add to Cart Bar

The developer is listed as Square Apps, based in Beaverton, Oregon, with a help center at square-apps.com. Despite the name, the listing gives no sign of a link to the Square payment company. The app launched on 22 March 2024 and had 139 reviews at 5.0 when we checked, which is a fast pace for an app that is younger by two years.

The pitch is simplicity and price: a bar that mimics your store's style, can be adjusted for colour, size and position, tracks clicks and revenue in the app, and costs nothing. The listing shows Free with no paid tiers.

Pricing: free versus a small monthly fee

This is the first and biggest difference.

Square's FAQ says the app is free to install and the listing shows no upgrade path. For a store that just wants the button to stay on screen, that is hard to beat.

Zoorix asks for $4.99/month on Basic, which already includes custom colours, multi-currency, multi-language, cart drawer integration, custom CSS and custom JavaScript. Premium at $9.99/month adds bundle app integrations, the bar on collections and pages, the toggle relative to your theme's button, scroll to element, and quick add on home and collection pages. Paying yearly saves about 20%.

The question is whether the Premium features earn back $120 a year. For a store doing a few orders a day, one extra sale a month usually covers it, but only if you would actually use the collection and quick add features.

The bar itself

Placement and devices

Square documents more of the basic layout controls. Its setup guide lets you place the bar at the top or bottom of the page and choose desktop, mobile or both. Its FAQ adds that the bar can appear immediately or after the visitor scrolls.

Zoorix's listing does not mention a top or bottom choice or separate device settings, and the help articles we read do not cover them either. That does not prove they are missing, but you should test it during the trial if you have a strong preference. What Zoorix does document is a Premium toggle that shows the bar relative to your theme's own button, so it only appears once the original button has left the screen. That avoids two add to cart buttons showing at the same time.

Quantity and variants

Square has a switch to show or hide a quantity selector, and its FAQ states the bar supports all product types including variants and digital products. The colour settings even include a variant selector border.

Zoorix does not describe its variant or quantity handling on the listing. Again, worth a test on a product with several options before you commit.

What happens after the click

This is a real split. Zoorix advertises Fast Checkout, sending the customer straight to checkout. Square's FAQ is explicit that the bar sends products to the cart page or the cart drawer, if your theme supports one, and not directly to checkout.

Which is better depends on your store. Skipping the cart suits single product stores and impulse buys. Sending to the cart or drawer suits stores that rely on cart upsells or free shipping thresholds. If you are unsure which path converts better, our comparison of cart page vs cart drawer goes deeper.

Pages beyond the product page

Zoorix Premium is the only one of the two that leaves the product page. It can show the sticky bar on collection pages, the home page and custom pages, with a help article on changing which product is featured on the home page. It also adds a quick add button on product cards in home and collection grids, so shoppers can add an item without opening the product.

Square shows the bar on product pages by default and lists nothing for other page types. If your traffic lands mostly on collections, that matters.

Targeting rules

Square's display rules are the more flexible of the two. You can pick specific products, filter by price or filter by inventory. That lets you, for example, keep the bar only on products above a certain price, or hide it when stock runs out.

Zoorix lets you hide or exclude specific products and collections, and has a separate option to hide the bar on sold out products. It covers the common cases but does not list price based rules.

Design and code

Both apps handle colours. Square documents background, text, button colours, shadow and rounded corners, and can auto-match the button to your theme. Its FAQ also mentions changing text and size.

Zoorix lists custom colours and design on Basic, has help articles for changing the button text and the font, and includes custom CSS and custom JavaScript from the first paid plan. It also documents JavaScript events fired by the sticky bar, which a developer can use for tracking or custom behaviour. Square's listing and the help articles we read do not mention custom code.

If you have a developer or like to tweak things yourself, Zoorix gives you more room. If you want to configure everything with sliders and colour pickers, Square is enough.

Integrations

Zoorix lists six apps under Works with: AMP Slide Cart, iCart, Monster Upsell, qikify Slide Cart, Rebuy Smart Cart and Upcart. Basic includes cart drawer integration and Premium adds bundle app integrations, with a dedicated help article. For a store already running one of those drawers, that is a real reason to pick Zoorix: the add to cart event has been tested against them.

Square lists only Shopify Admin under Works with. It says it opens the cart drawer if supported, which in practice means your theme's native drawer. With a third party drawer, check behaviour before going live. If you are still choosing a drawer, see our roundup of cart drawer apps.

Both listings state support for multiple currencies and languages on the storefront.

Analytics

Square lists click, CTR, order and revenue tracking directly in the app. That is useful for a simple question: is this bar actually earning anything?

Zoorix shows analytics only as App Store category tags (behaviour tracking, performance tracking, real-time analytics) with no description of what is measured. Treat it as unconfirmed. If you need hard numbers, you can still use its JavaScript events with your own analytics tool.

Admin and support

Square's admin is available in 15 languages, including French, Spanish, German, Italian and Japanese. Zoorix lists English only. Both developers offer support through the app and a help center. Recent reviews on both listings show developers replying in 2026, which is a good sign for apps of this size.

Three store profiles

A single product store pushing paid social traffic

A brand selling one hero product to mobile visitors from short video ads wants the fastest route from interest to payment. Zoorix's Fast Checkout fits: the shopper taps the bar and lands on checkout. The $4.99 Basic plan is enough here.

A small catalogue store just starting out

A store with 30 products, the theme's native cart drawer and a tight budget gets most of the value from Square at no cost. Top or bottom placement, a quantity selector, a price rule to show the bar only on higher priced items, and click tracking to see if it helps.

A larger catalogue with a third party cart drawer

A store with hundreds of products, Upcart or Rebuy for its drawer and a bundle app on product pages will run into edge cases with a generic bar. Zoorix Premium is listed as working with those apps, and quick add on collection grids helps shoppers who browse many products. The $9.99/month is easy to justify at that size.

Moving from one to the other

Both apps add the bar through Shopify's app embed. To switch, turn off the old app's embed in the theme editor (Online Store, Themes, Customize, App embeds), then uninstall it from the admin so you are not billed or left with two bars. Then install the other app and enable its embed. Zoorix's help center has a short article on turning the embed on.

Things to redo by hand: colours and button text, product exclusions or display rules, and any custom CSS. Square's price and inventory rules have no direct equivalent in Zoorix, so plan to use product and collection exclusions instead. Going the other way, Zoorix's collection page bar and quick add have no equivalent in Square, so those simply disappear.

Before switching for good, test a product with variants on mobile, check the click lands where you expect (checkout, cart page or drawer), and watch a week of orders. For other ways to stop shoppers dropping off, read our guide on reducing cart abandonment, or compare more sticky bars in STKY vs Buy Me and SEOWILL vs Sticky Add To Cart Bar Pro.