FlowCheck vs Square: Sticky Add to Cart Bar
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Feb 19, 2026 for FlowCheck, Nov 8, 2026 for Square.
The short answer
- Square lists 2 features FlowCheck’s listing doesn’t mention, including One-click upsell, Sticky cart.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureFlowCheck resolves technical friction points in your store's purchase journey. It specifically targets laggy quantity selectors and buttons that require multiple clicks to trigger. By acting as a performance layer, it ensures every click is captured and processed instantly across all devices. This leads to a smoother shopping experience and removes invisible barriers to checkout.
Increase conversions by keeping the Add to Cart bar visible while shoppers scroll. Square Sticky Add to Cart Bar helps customers buy faster, reduces cart abandonment, and improves the mobile shopping experience. Fully customizable to match your store’s design, it works on mobile and desktop, and the setup takes 1 minute. Clicks, orders, and revenue can be tracked with built-in analytics.
- Ensures Add to Cart and Checkout buttons respond to the very first click.
- Fixes laggy quantity inputs to prevent errors during the purchase flow.
- Runs as a safe theme extension without modifying your store's code.
- Reduce abandonment: Keep Add to Cart always in view for easy purchase access.
- Seamless design: Mimics your store’s style for a consistent experience.
- Fully customizable: Adjust colors, size, and position to fit your store's look.
- Analytics: Monitor clicks, CTR, orders, and revenue growth directly in-app.
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 |  FlowCheck |  Square |
|---|---|---|
| Detected stores | Not published | 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 | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | FlowCheck | Square |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 140 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | 1% |
FAQ
FlowCheck and Square: common questions
- What features does each app list that the other doesn’t?
- FlowCheck lists 1 the others don’t mention, such as Custom CSS. Square lists 2 the others don’t mention, such as One-click upsell, Sticky cart. 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 Feb 19, 2026 for FlowCheck, Nov 8, 2026 for Square; 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 Feb 19, 2026 for FlowCheck, Nov 8, 2026 for Square. 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.