Checkout Upsell — Addonn vs TackOn: Cart Fees & Surcharges
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026.
The short answer
- TackOn is detected on 36× as many Shopify stores as Checkout Upsell: 36 vs 1 as of Nov 8, 2026.
- Both list a free plan. Paid plans start at $39.95/month for Checkout Upsell and $5/month for TackOn.
- TackOn lists 7 features Checkout Upsell’s listing doesn’t mention, including Cart drawer, Cart upsell, Custom CSS.
Head to head
- Ireland
- United States
- Australia
- Canada
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Starter
- · 25 add-on orders free / month
- · Create upto 2 add-ons
- · Fixed add-on pricing
- · Live chat support
Premium
- · Auto assign tags to add-on orders
- · Create upto 5 add-ons
- · Fixed add-on pricing
- · Up to 500 add-on orders / month
Growth
- · Auto fulfill add-on line items
- · Create upto 10 add-ons
- · Priority customer support
- · Unlimited add-on orders
- · Widget customizations
Free
- · 20 orders a month, on your live store
- · All fee types, nothing held back
- · Keep 100% of what you collect
Starter
- · All fee types(fixed, percentage, mix)
- · Custom HTML/CSS support
- · Includes 50 orders/month
- · Multi-currency support
- · Priority support
- · Product-specific rules
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureTurn checkout into revenue with optional service add-ons. Offer express shipping, gift services, warranties, and premium extras with one-click toggle widgets. Native Shopify Plus checkout integration means no pop-ups or redirects. You keep 100% revenue—zero commissions ever. Built for global stores with multi-currency and translation support. Create up to 10 add-ons with fixed or percentage pricing.
Add cart surcharges, handling fees, and extra charges to Shopify checkout. Use for processing fees, expedited shipping, rush orders, shipping insurance, gift wrap service, tip collection, donation box, environmental fees, fragile item handling, oversized product charges, and custom service fees. Make a fee optional with a toggle your customer can switch on, or required so it is added to every cart and shown clearly.
- Upsell optional add-ons directly inside Shopify Checkout
- Set fixed or flexible add-on prices based on cart value
- Built-in automatic multi-currency support — no extra setup needed
- Add fixed, percentage, or combined fee types to any cart
- Create product-specific surcharge rules with flexible conditions
- Multi-currency support through Shopify Markets integration
- Clean install/uninstall using theme app extensions
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 |  Checkout Upsell |  TackOn |
|---|---|---|
| Detected stores | 1 | 36(ahead) |
| Net store change, 28 days | 0 | +1 |
| Stores added, 28 days | Not enough data | 2 |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Furniture | Apparel & Accessories, Home & Garden, Food, Beverages & Tobacco |
| Top store countries | Ireland | United States, Australia, Canada |
Reviews
| Measure | Checkout Upsell | TackOn |
|---|---|---|
| App Store rating | Not published | 4.3 ★ |
| App Store reviews | Not published | 5 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Checkout Upsell | TackOn |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $39.95/month | $5/month(ahead) |
| Longest free trial | 14 days | 30 days |
| Plans listed | 3 | 2 |
Listing
| Measure | Checkout Upsell | TackOn |
|---|---|---|
| Shopify category rank | #891 | #211(ahead) |
| Shopify App Charts | Not on this week’s charts | #9 on Rookies in Upsell and cross-sell |
| Built for Shopify | No | Yes |
| Launched | Nov 5, 2025 | Dec 11, 2025 |
| Languages | 1 | 1 |
| Developer | Appiers | Normalize |
FAQ
Checkout Upsell and TackOn: common questions
- Which is more popular, Checkout Upsell or TackOn?
- TackOn is detected on 36× as many Shopify stores as Checkout Upsell: 36 vs 1 as of Nov 8, 2026.
- Is Checkout Upsell or TackOn cheaper?
- Both list a free plan. Paid plans start at $39.95/month for Checkout Upsell and $5/month for TackOn. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Checkout Upsell lists 6 the others don’t mention, such as Checkout upsell, Free gifts, Multi-currency, Multi-language. TackOn lists 7 the others don’t mention, such as Cart drawer, Cart upsell, Custom CSS, Custom HTML. 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 Nov 8, 2026; 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 Nov 8, 2026. 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.