AddOnce vs ShopLink
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026 for AddOnce, Oct 13, 2026 for ShopLink.
The short answer
- AddOnce lists 2 features ShopLink’s listing doesn’t mention, including Product recommendations, Warranties.
Head to head
AddOnce Unlimited
- · 14-Day Full Access Trial
- · Attach to unlimited products
- · Checkbox & dropdown displays
- · Future updates included
- · Native cart lines
- · Native products & variants
Basic Plan
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureAddOnce lets merchants present optional products and services directly on the product page. Create a Companion Product once, then attach it to any product where it belongs. Because AddOnce uses native products, inventory, variants, and fulfillment continue to work as expected. Customers choose optional add-ons before adding to cart, and each item is added as its own native cart line.
ShopLink App allows merchants to link a main product to add-on products based on size variants. When a main product has size variants, a different add-on product can be linked to each size so both items are purchased together. This ensures the add-on is added to the cart at the same time as the main product and integrates seamlessly with the Shopify cart and checkout.
- Add optional add-ons with native Shopify products
- Create once. Attach to unlimited products.
- Customers add each selection as independent Shopify cart lines
- Automatically supports single- and multi-variant companion products
- Link add-on product variants to specific main product sizes using an Admin Block
- Display a dropdown of add-on product variants on the main product page
- Grouped display of main and add-on products in the cart and checkout
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 |  AddOnce |  ShopLink |
|---|---|---|
| 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 | AddOnce | ShopLink |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
AddOnce and ShopLink: common questions
- What features does each app list that the other doesn’t?
- AddOnce lists 2 the others don’t mention, such as Product recommendations, Warranties. ShopLink lists 1 the others don’t mention, such as Cart drawer. 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 Oct 14, 2026 for AddOnce, Oct 13, 2026 for ShopLink; 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 Oct 14, 2026 for AddOnce, Oct 13, 2026 for ShopLink. 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.