How to choose marketing and conversion apps for Shopify
The largest and least honest shelf on the App Store. Almost every app here reports a number that makes it look successful, and almost none of those numbers survive contact with a holdout test. Choosing well is mostly a matter of knowing which numbers to ignore.
Updated 2026-08-25 · covers 7,071 marketing and conversion apps
Key takeaways
- Four attribution-claiming apps will report more revenue than the store actually made.
- A holdout test is the only way to tell influence from coincidence.
- The cheapest pricing model at 500 customers is often the most expensive at 50,000.
- A customer list you cannot export is not yours.
What do marketing and conversion apps actually do?
They do three separate jobs under one label. Capture tools turn an anonymous visitor into an email address or phone number. Nurture tools send messages to that list afterwards. Onsite tools change what a visitor sees while they are still on the page. Most apps claim all three and do one well.
Capture tools turn an anonymous visitor into an address or a phone number. Nurture tools send to that list afterwards. Onsite tools change what a visitor sees while they are still on the page. An app claiming all three usually does one of them well, and you will find out which within a month of installing it.
Why does every app report different revenue?
Because each app counts sales using its own attribution window, and those windows overlap. Four installed apps will together claim more revenue than the store actually made. Nothing is being falsified: each tool is counting a sale it touched. Only a holdout test, where some traffic never sees the tool, separates influence from coincidence.
Every app in this category takes credit using its own attribution window, and those windows overlap. Install four and their combined claimed revenue will comfortably exceed your actual revenue. This is not fraud, it is each tool counting a sale it touched somewhere along the way. The only real defence is a holdout: keep a slice of traffic away from the tool and compare. If a vendor will not support a holdout test, the number they are showing you is marketing rather than measurement.
How do you compare two conversion apps?
On pricing basis before price, because contacts, sends, orders and share-of-revenue diverge enormously as a store grows. Then on page weight, since an onsite tool that slows a mobile page can lose more conversions than it wins. Then on whether the customer list can be exported in a usable form.
Pricing basis matters more than price. Contacts, sends, orders and share-of-revenue diverge enormously as you grow, and the cheapest model at 500 customers is often the most expensive at 50,000. Page weight matters second: an onsite tool that adds 400ms to a mobile page can lose more conversions than it wins. Then ask what happens to your list when you leave, because a list you cannot export is not yours.
What changes by vertical
The same marketing and conversion app can be the right choice for one kind of store and the wrong one for another. What you sell decides which of its trade-offs matter.
Fashion and apparel
Returns are the economics here, not conversion. A tool that lifts add-to-cart while raising returns is a net loss, so measure both or you are flying blind. Fit content usually beats another pop-up.
Consumables and repeat purchase
Lifetime value does the work, so retention beats acquisition. Judge these apps on second and third order rate, never on first-order conversion.
High-ticket and considered purchase
Long sales cycles break short attribution windows. Anything with a seven-day window will systematically under-credit the channel that works and over-credit the last touch.
The mistakes that cost most
- Judging a tool on the revenue it reports about itself.
- Stacking three tools that each add a script to every page.
- Revenue-share pricing, which looks free at the start and becomes the largest line on your bill precisely when the store is working.
- Building a list inside a tool that will not let you export it.
Questions merchants ask
Why does my email app claim more revenue than my store made?
Attribution windows overlap. Each app credits itself for any sale it touched inside its own window, so several apps can each claim the same order. Compare against a holdout rather than adding the reported figures together.
Do pop-up apps hurt conversion rate?
They can, in two ways: by interrupting a visitor who was already buying, and by adding page weight that slows the mobile experience. Both effects are measurable, so test against a holdout before judging the tool by its own reported captures.
Is revenue-share pricing cheaper than a monthly fee?
It is cheaper while the store is small and more expensive once it works, because the bill scales with success rather than with usage. Model it at three times your current revenue before agreeing to it.
How the ranking on this site works
Apps are ordered by how many merchants reviewed them and how well, so the top of a category reflects accumulated use rather than our opinion. That favours apps which have been collecting reviews for years, which is worth remembering when a newer tool is a better fit. Paid placements sit in their own labelled block and never move a row in the ranking below. EcomApps is not affiliated with Shopify.