The Shopify upsell app built on the Invisible Second Sale.
Upsellr runs upsells on the product page, in the cart, at checkout and after payment, so the customer who already decided to buy leaves with a bigger order. Set it up in a drag-and-drop editor, no code.
How it works
One app for every place an order can grow.
01Product page
Make the bigger order the easy choice.
Bundles, quantity breaks, upgrades to a larger size or version, product add-ons and frequently-bought-together offers, right next to the add-to-cart button, where the buyer is already deciding.
- Bundles
- Quantity breaks
- Upgrades
- Add-ons
02Cart
Offer the one thing that completes the order.
Cart upsells and product recommendations in the cart drawer, with a progress bar toward free shipping or a free gift, so the next item has a reason to be added.
- Cart upsells
- Progress bars
- Free gifts
- Free shipping
03Checkout
One more offer before payment.
Checkout upsells, built on Shopify's checkout extensibility. Shopify only allows these on Shopify Plus stores; every other placement works on any plan.
- Checkout upsells
- Shopify Plus
04After payment
The offer that cannot cost you the sale.
A one-click post-purchase offer, shown after the order is paid. The customer adds it without re-entering payment details, and the first order is already safe.
- Post-purchase
- One-click
Built to be tested, not just switched on.
An upsell that is never measured is a guess. Upsellr ships with the tools to find out which offer earns its place.
- 01
Drag-and-drop editor
Build and place offers without a developer or theme code.
- 02
A/B testing
Test one offer against another and keep the one that lifts order value.
- 03
Analytics
Click-through and conversion rates per offer, with suggestions on what to change.
- 04
AI recommendations
Product recommendations picked from your catalogue, for stores that don't want to hand-pair every offer.
Upsellr is the app. The Invisible Second Sale is the method.
The Invisible Second Sale is our framework for which offers a store should run, where, and in what order. On Mountain Ice it took average order value from under $20 to $39. Upsellr runs the offers; the method decides them. Want the plan first? The $9 AOV Gameplan lists the five offers in order.
The difference
The same traffic, two very different orders.
| Without Upsellr | With Upsellr | ||
|---|---|---|---|
| Product page | Bundles and upgrades | One product, one price | Bundles, quantity breaks and upgrades beside the buy button |
| Cart | Add-ons | Whatever the buyer remembered to add | A relevant offer and a progress bar to free shipping or a gift |
| Checkout | Last offer before payment | Nothing | Checkout upsells (Shopify Plus) |
| After payment | Thank-you page | A receipt and nothing more | One-click post-purchase offer |
| Testing | Knowing what works | Guesswork | A/B tests and per-offer analytics |
| Setup | Effort | Custom development | Drag-and-drop editor, no code |
Upsellr, answered.
How much does Upsellr cost?
Stores with up to 500 orders pay a one-time $197. Above 500 orders it is $29.95 a month, with a 14-day free trial. Check the Shopify App Store listing for current terms.
Does Upsellr work on every Shopify plan?
Product page, cart and post-purchase offers work on any plan. Checkout upsells need Shopify Plus, because Shopify only allows checkout extensions on Plus stores.
Do I need a developer?
No. Offers are built and placed in a drag-and-drop editor inside the app.
What is the difference between Upsellr and the Invisible Second Sale?
Upsellr is the app that runs the offers. The Invisible Second Sale is the method behind them: which offers, where, and in what order. You can use the app on its own, or have us design and set up the whole system as an Invisible Second Sale project.
Who builds Upsellr?
We do. Upsellr is built by Skuology and launched on the Shopify App Store in November 2025.
Grow every order you already get.
Install Upsellr and set up your first offer today, or have us build the whole system for you as an Invisible Second Sale project.