Complete guide to Shopify checkout extensions (2026)
Checkout extensibility replaced checkout.liquid. Here is what it actually does, which features require Plus, and how merchants customize checkout in 2026.
Sold out shouldn't mean sale lost
Dash Checkout is your all-in-one checkout toolkit for Shopify. Win back revenue with back-in-stock alerts, keep purchases fair with order limits, and show every shopper the right shipping and payment options with checkout rules.
Trusted by Shopify merchants worldwide
One app, three jobs
Everything your checkout needs in one place
Three sets of tools that work on their own or together — all inside a single Shopify app.
Back-in-Stock Alerts
Shoppers tap "Notify me" on sold-out products, and Dash emails them the moment you restock — so the sale happens later instead of never.
Order Limits
Quantity, price, weight, and per-customer limits that hold up in cart and checkout — with customer memory that works across orders.
Checkout Rules
Hide, rename, or reorder shipping options and payment methods based on cart contents, customer, or destination. No code.
Back-in-Stock Alerts
Turn stockouts into your next round of sales
Every stockout builds a waitlist
Out-of-stock pages usually end the conversation. With back-in-stock alerts, they start one — Dash keeps the list and does the following up for you.Capture demand while you restock
A notify-me form appears on sold-out products automatically. Shoppers leave an email — no account, no friction.
Alerts send themselves
When inventory comes back, Dash emails everyone who asked. Set thresholds, batch sizes, and delays so drops don't oversell.
See the revenue you got back
Follow every request from notified to clicked to converted, and export your subscriber list anytime.
Control what, how much, and how often
Quantity, price, weight, and customer-based limits — with clear, translatable messages shoppers actually understand.Limits that remember your customers
Track lifetime purchases per customer. Cap by quantity or spend — daily, weekly, monthly, yearly, or forever.
Enforced where it counts
Rules are validated in real time in cart and at Shopify Checkout. No loopholes, no overselling.
Fair access on big drops
One per customer, VIP early access, wholesale minimums — the rules that keep high-demand launches orderly.
A checkout that adapts to every cart
Every shopper sees shipping and payment options that actually apply to them — nothing confusing, nothing that causes support tickets.Shipping rules
Hide express shipping for oversized carts, put the free option first, or rename methods so they make sense to shoppers.
Payment rules
Hide Cash on Delivery above a certain order value, reorder payment methods by preference, or limit options by country.
Conditions you already think in
Cart subtotal, customer tags, logged-in status, products in cart, countries, and zip codes — combined however you need.
What merchants say
Join thousands of stores trusting Dash Checkout
"Great app which is easy to use and excellent customer support! Thank you for the great service"
Nas Nakit
Australia
"If you are looking for an intuitive app to help set limits for your products, this is an excellent choice. The app has a variety of ways to set limits to help serve your customers."
Dad Tired
United States
"Functional app with excellent customer support."
Boya Porcelain
Serbia
"Highly recommend - super simple to set up yet highly customizable. Goes beyond the capabilities of alternative apps. Very reasonable pricing!"
Binopolis
United Kingdom
"The best experience I have ever had with a Shopify app! Can't recommend highly enough!"
Venus Vinyl
United Kingdom
"I am very happy with the level of customer service, and the app is doing exactly what we need."
Capitalkidz
United States
"So far, so good! Great communication with the team when something needed tweaking, and simple and straightforward to implement."
The Nude Alchemist
New Zealand
"This app solved my problem. I will recommend it to all my friends who use Shopify. The support responds quickly."
Baraka Store
Poland
"Great app. Does exactly what it needs to be doing. Easy setup. Definitely recommend."
Cheeki Collection
Germany
"Great support, great tool. Quick and easy setup!"
Jamoona
Germany
"Great app which is easy to use and excellent customer support! Thank you for the great service"
Nas Nakit
Australia
"If you are looking for an intuitive app to help set limits for your products, this is an excellent choice. The app has a variety of ways to set limits to help serve your customers."
Dad Tired
United States
"Functional app with excellent customer support."
Boya Porcelain
Serbia
"Highly recommend - super simple to set up yet highly customizable. Goes beyond the capabilities of alternative apps. Very reasonable pricing!"
Binopolis
United Kingdom
"The best experience I have ever had with a Shopify app! Can't recommend highly enough!"
Venus Vinyl
United Kingdom
"I am very happy with the level of customer service, and the app is doing exactly what we need."
Capitalkidz
United States
"So far, so good! Great communication with the team when something needed tweaking, and simple and straightforward to implement."
The Nude Alchemist
New Zealand
"This app solved my problem. I will recommend it to all my friends who use Shopify. The support responds quickly."
Baraka Store
Poland
"Great app. Does exactly what it needs to be doing. Easy setup. Definitely recommend."
Cheeki Collection
Germany
"Great support, great tool. Quick and easy setup!"
Jamoona
Germany
FAQs
Frequently Asked Questions
Everything you need to know about Dash Checkout
What does Dash Checkout include?
One app with three sets of tools: back-in-stock alerts that email shoppers when you restock, order limits for quantity, price, weight, and per-customer caps, and checkout rules to hide, rename, or reorder shipping and payment options.
How do back-in-stock alerts work?
A notify-me form shows on sold-out products. When you update inventory in Shopify, Dash automatically emails everyone who signed up — you can set inventory thresholds, batch sizes, and send delays per campaign.
Does it work with Shopify Checkout?
Yes. Order limits and checkout rules run on Shopify Functions and checkout extensions, so they work natively with Shopify Checkout — no checkout.liquid, no theme hacks.
Can I track customer purchase history?
Absolutely. Customer memory tracks lifetime purchases, so you can set caps like "max 5 units per customer, ever" or "max $500 spend per month."
Does it support multiple languages?
Yes — limit messages support 130+ languages automatically, and back-in-stock emails can be written per locale with their own subject, body, and button text.
Can I try it for free?
Yes. There's a free plan to start with, and every paid plan includes a 3-day free trial. Plans start at $19/month.
From the blog
View all posts »Tips, guides, and case studies for Shopify merchants
How to set up tiered wholesale pricing with order minimums on Shopify
Combine volume price breaks with minimum order quantities so wholesale buyers unlock better pricing only when ordering enough to make shipping worthwhile.
Monthly purchase limits on Shopify: Complete setup tutorial
Step-by-step guide to setting up purchase limits that reset automatically each month. Covers rule creation, Shopify Flow automation, and testing.
How to Stop Scalpers from Clearing Out Your Trading Card Shop: A Complete Guide to Purchase Limits on Shopify
Trading card retailers are losing inventory to scalpers within minutes of restocking. Here is how to enforce real per-customer purchase limits that actually work on Shopify.
Ready when your next stockout is
Join Shopify merchants worldwide using Dash Checkout to recover lost sales and keep checkout under control. Free plan available.