The buy button that scrolls with the shopper
On a phone the buy box is gone after one flick. Sticky ATC docks a bar to the bottom of the screen the moment shoppers scroll past it — product, price, the savings in money and Add to cart — so the decision to buy never has to wait for a scroll back up. Configured in Comver, measured from your own storefront events.
- Appears after the buy box — by selector or scroll %
- Carries price and the savings badge
- Optional hand-off to the bundle upsell popup
Why it works
Ingredients
Customer reviews
Two weeks in and my skin looks rested. No stinging on sensitive days.
Glow Renewal Serum · 30 ml
When it appears
Shopper scrolls past the buy box
form[action="/cart/add"] · your selector, or the default
The bar docks to the bottom
Fallback: after 40% page scroll when the selector matches nothing
What it carries
- Product image and title
- Price — and the savings badge in money
- Add to cart → Adding… → Added
- Optional hand-off to the bundle upsell popup
Sticky shown
1,204
Last 30 days
Action rate
8.0%
96 added from the bar
10–80%
Scroll threshold
Used when the CSS selector matches nothing on the page — or type “none” to go by scroll percentage only
3
Button states
Add to cart → Adding… → Added — with your own button text
4
Live metrics
Attributed revenue · Added to cart · Shown (with a daily sparkline) · Action rate
+3–9%
ATC uplift
Typical, not measured. What the bar actually did is counted from sticky-shown and added events
The estimated impact is typical, not measured. Numbers in the mock-ups are illustrative — in the product, Shown and Action rate appear from storefront events and Attributed revenue fills in as orders land.
After the buy box — not before
A sticky bar that shows while the real button is still on screen is noise. Sticky ATC waits until the shopper has scrolled past an element you name — the product form by default — and only falls back to a scroll percentage when that selector matches nothing on the page.
- “Show only after this element”: a CSS selector the shopper must scroll past. Leave empty for the default, or type none to go by scroll percentage
- “Show after page scroll”: 10–80%, used when the selector matches nothing
- Everything saved in Comver — the theme editor step is optional and only adds placement nudges and custom CSS
Settings
How Sticky ATC behaves on your storefront. Saved here — no theme editor required.
Used when the element below matches nothing on the page.
Show only after this element
A CSS selector the shopper must scroll past. Leave empty for the default, or type none to go by scroll percentage.
Button text
Where the bar appears
A product page, top to bottom.
The bar shows from here down
Price, savings and one clear button
The bar carries the product image and title, the price and — when there is a compare-at price — the savings badge written in money (“You save $9.30 💸”, emoji switchable off). One button, your text, three states: Add to cart, Adding…, Added. Mobile-first, and the same bar on desktop.
- Button text and the savings badge are settings; the emoji can be switched off for storefronts that do not use it
- Style 1 — Basic reads your storefront’s button colour, type and corner radius and follows them; Marketplace and Beauty are authored skins
- Custom CSS is loaded last, so it wins
Glow Renewal Serum · 30 ml
Glow Renewal Serum · 30 ml
Glow Renewal Serum · 30 ml
Button text, the savings badge and the emoji are settings. “Added” can hand off to the Bundling & Upsells popup.
Added — now offer what pairs with it
Switch on “Open the upsell popup after adding” and the bar hands the moment to Bundling & Upsells: a “Frequently bought together” popup with the product’s bundles and a free-shipping progress bar. Sticky ATC counts the popup opened and the upsell added as its own actions.
- Needs Bundling & Upsells to be active — the popup shows its bundles
- Events: sticky shown · upsell popup opened → sticky bundle added · upsell added
- Discount codes are applied to the cart automatically; the cart is tagged for attribution
Glow Renewal Serum
$52.70 You save $9.30
Frequently bought together
Numbers, on/off and settings — all on one page
Every module page in Comver reads the same way: the four metrics first, then availability, then the module’s own settings, then the theme-editor hand-off last and clearly marked optional.
Everything Sticky ATC needs is on this page
Attributed revenue, Added to cart, Shown with its daily sparkline and Action rate. The module card with its description and the “+3–9% ATC uplift (typical, not measured)” line, the Module availability control (Basic: up to 3 active · Pro: all modules), the settings, Where it shows, and the optional theme-editor card.
Revenue modules
Six modules, what each one earned, and everything they need to run — configured here, not in the theme editor.
Attributed revenue
$2,140
31 attributed orders · last 30 days
Added to cart
$4,880
Cart value the bar put in — an upper bound on revenue
Shown
1,204
Action rate
8.0%
96 actions on 1,204 impressions
Sticky ATC
A sticky add-to-cart bar that appears once shoppers scroll past the buy box, carrying price and savings.
Product page · on scroll · +3–9% ATC uplift (typical, not measured)
Module availability
ActiveSticky ATC is available on your storefront and counts toward the active module allowance.
Basic: up to 3 active · Pro: all modules
Small module. Full set of controls.
Where it shows
All products, only the products and collections you list, or all products except the ones you list — comma-separated handles.
One style for every module
Style 1 — Basic follows your theme; Style 2 — Marketplace and Style 3 — Beauty are authored skins. Pick once on the Revenue modules overview and it applies to all six.
Activate, deactivate, keep the config
“Activate module” puts it on the storefront and counts toward the allowance. Deactivate pauses it — the configuration is preserved and can be activated again at any time.
Button and badge
Button text, the savings badge and the emoji. States Add to cart → Adding… → Added are built in.
Upsell hand-off
Open the Bundling & Upsells popup after adding — one switch, one dependency, named on the page.
Learn moreTheme editor — optional
The only theme step is having the “Comver Sticky ATC” app embed switched on. Settings › Theme embed shows which modules render on the storefront.
Shown, acted on, attributed
Sticky ATC stamps every event with its module key. Shown and Action rate appear immediately from storefront events; Attributed revenue fills in as orders land — by discount code (deterministic) or cart token (last touch), refunds reversed.
Shown
sticky shown
Every time the bar docked — with a daily sparkline on the module page
Action
sticky bundle added · upsell added
Action rate = actions ÷ impressions, counted from the same events
$
Attributed revenue
Orders carrying the module’s code or coming from a cart it touched. “Added to cart” is an upper bound on revenue
The “+3–9% ATC uplift” range is typical, not measured. Attribution starts after activation — no outcome is estimated before real data exists.
Live in four clicks
- 1
Activate
Open Revenue modules → Sticky ATC and click “Activate module”. Basic plans run up to three modules; Pro runs all six.
- 2
Set the trigger
Keep the default selector or paste your own; set the scroll-percentage fallback.
- 3
Word the button
Button text, savings badge on or off, emoji on or off, and whether “Added” opens the upsell popup.
- 4
Read the numbers
Shown and Action rate the same day; Attributed revenue as orders land. Save settings — the theme editor is optional.
Frequently asked questions
Once the shopper scrolls past the element you name in “Show only after this element” — the product form by default. If that selector matches nothing on the page, the bar falls back to “Show after page scroll” (10–80%). Type “none” to go by scroll percentage only.
The product image and title, the price and — when there is a compare-at price — a savings badge in money (“You save $9.30 💸”, emoji switchable), plus one button with your text: Add to cart → Adding… → Added.
Style 1 — Basic reads your storefront’s button colour, type and corner radius and follows them. Style 2 — Marketplace and Style 3 — Beauty are authored skins. Custom CSS is loaded last, so it wins. The only theme step is having the “Comver Sticky ATC” app embed switched on.
Yes — switch on “Open the upsell popup after adding”. It needs Bundling & Upsells to be active, because the popup shows that module’s bundles. The popup opened and any upsell added are counted as Sticky ATC actions.
Like every Comver module: at order time, an order carrying the discount code the module applied (deterministic) or an order from a cart it touched (last touch), with refunds written as negative rows. Shown and Action rate come from storefront events immediately.
“Where it shows”: all products, only the products and collections you list, or all products except the ones you list. Deactivating keeps the configuration for later.
No. It is labelled “typical, not measured” on the module page. The product never estimates an outcome before real data exists — it counts sticky shown, added and attributed orders from your own store.
Keep the buy button within reach
Activate Sticky ATC, name the element it should follow and word the button. Shown and Action rate the same day; attributed revenue as orders land.
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