Top 5 must-have Shopify apps for your store

Shopify’s App Store has thousands of listings, and most stores need fewer than ten of them. The problem is not finding apps; it is choosing the handful that pay for themselves and skipping the rest, because every app adds scripts, a monthly fee and another dashboard to check.

This list is organised by job rather than by brand. For each category we explain what the app should do, what to look for, and one or two well-established options. Names change; the categories do not.

1. Upsell and cross-sell: Cart X

If you install one revenue app, make it an upsell app. Every other tool on this list brings shoppers to the checkout or brings them back; an upsell app increases what each of those shoppers spends, and it does so at the cheapest point in the funnel: someone who has already decided to buy.

What it should do

• In-cart upsell / add-to-cart popup for quantity breaks, upgrades and complementary items while the shopper is still building the order.
• One-click post purchase upsell, shown after payment and before the thank you page, accepted with a single tap using the payment method already on file. Add a downsell for shoppers who decline. This placement cannot hurt checkout conversion, because the original order is already complete.
• Thank you page / order status page offers, the lowest-pressure spot for a discounted add-on.
• Targeting by product, collection, cart value and customer tag, so offers are relevant rather than generic.
• A/B testing and analytics per placement, so you know which offer earns and which one annoys.
• Built on Shopify Checkout Extensibility, which is what makes post-purchase and thank you page offers possible without theme hacks.

Our pick: Cart X. It covers all three placements, runs an upsell funnel of up to three upsells and three downsells, ships a drag-and-drop thank you page builder, and works on any theme without code. It holds a 5.0 rating on the App Store. Pricing is by store order volume, not revenue: free up to 100 orders a month with every feature included (and a small “Powered by Cart X” badge), then $19/month up to 1,000 orders, $49/month up to 10,000, and $199/month with no cap. There is no revenue cap, no commission and no per-order fee, which matters once upsells start working; percentage-of-upsell pricing quietly eats the margin you just created. Full details on the pricing page.

We are obviously biased here, so judge it on the mechanics: start with a single post purchase offer, then read the goods and bads of post purchase upsells before you scale it.

2. Abandoned cart recovery: Klaviyo or Omnisend

Most carts are abandoned, and Shopify’s built-in abandoned checkout email is a single message with no segmentation. A dedicated email and SMS platform turns that into a sequence: a reminder within the hour, a nudge the next day, and an incentive only for carts that are still open after that.

What to look for

• Email and SMS flows triggered by Shopify events (checkout started, cart updated, order placed), not just checkout abandonment.
• Segmentation by cart value and product, so a $300 cart gets a different message from a $30 one.
• A free tier that lets you launch before you have a list worth paying for.

Picks: Klaviyo and Omnisend are the two most widely used options. Both have Shopify-native integrations, free starting tiers and templates for cart recovery flows. Klaviyo is the deeper platform; Omnisend is faster to set up. For the strategy rather than the tool, see ways to recover abandoned cart sales on Shopify.

One note on the overlap with upsells: adding more to a cart also raises the stakes when it is abandoned. Recovery flows and in-cart offers work best as a pair.

3. Product reviews: Judge.me or Loox

Reviews are the highest-leverage trust element on a product page, and the review app decides how many you collect, not just how they look.

What to look for

• Automated review requests after delivery, with photo and video upload.
• Star ratings that appear in Google Shopping and rich results (structured data support).
• The ability to display reviews on collection pages, in the cart and on the thank you page, not only on the product page.
• Import from your previous platform so you do not start at zero.

Picks: Judge.me is the standard choice, with a generous free plan and strong SEO output. Loox is the pick for visual-heavy stores where photo reviews are the point. Both let you time the request to fulfilment rather than purchase, which is the single biggest factor in how many reviews you actually collect.

4. Bundles and volume discounts: Shopify Bundles or Bundler

Bundles raise AOV by making the higher-priced option the default, and they do it before the shopper reaches the cart. They pair well with upsells rather than competing: the bundle sets the base order, the post purchase offer adds to it.

What to look for

• Fixed bundles (a kit sold as one product) and mix-and-match bundles (choose three from this collection).
• Quantity breaks with the discount shown on the product page, not only in the cart.
• Inventory that syncs per component, so a bundle goes out of stock when one item does.
• No theme code required, and compatibility with the checkout you use.

Picks: Shopify Bundles is Shopify’s own free app and is enough for fixed kits and simple mix-and-match. Bundler is a long-standing third-party option with more discount types and volume tiers. If bundles are your main AOV lever, how to increase average order value on Shopify covers how to price them.

5. Tracking and analytics: Meta pixel plus a profit dashboard

The last category is the one that tells you whether the other four are working. Two layers matter.

Pixel and conversion tracking. Shopify’s own Facebook & Instagram app installs the Meta pixel and Conversions API without code and keeps them working as checkout changes, which is the safest route for most stores. If you run multiple ad accounts or need multiple pixels, a dedicated pixel manager is justified; otherwise it is an extra script you do not need.

Profit and cohort reporting. Shopify Analytics reports revenue; it does not report contribution margin after ad spend, shipping and app fees, and it will not show you whether upsell revenue is coming from customers who would have bought anyway. Tools like Triple Whale and Lifetimely fill that gap. Start with Shopify’s native reports, and add one of these once ad spend passes the point where a few percent of wasted budget costs more than the subscription.

Whatever you use, make sure upsell revenue is attributable: your upsell app should report take rate and revenue per placement, and your analytics should show AOV before and after each change. Otherwise you are guessing.

How to choose without bloating your store

• One app per job. Overlapping apps fight over the same cart and slow the storefront.
• Prefer Checkout Extensibility-native apps for anything touching the cart, checkout or the thank you page. Legacy checkout.liquid customisations have been retired, and apps built on the current stack are faster and more stable.
• Check pricing at scale, not at install. A free plan is useful; an app that charges a percentage of the revenue it helps generate gets expensive precisely when it works.
• Measure one change at a time. Install, wait two weeks, compare, then add the next app.

New to upselling entirely? What is a Shopify upsell is the place to start, and the post purchase upsell, cart upsell and thank you page upsell pages cover each placement in depth.

Try it on your store

Cart X is the upsell pick on this list because it covers every placement on Shopify Checkout Extensibility and charges nothing on the revenue it generates. Install it from the Shopify App Store; the free plan includes every feature up to 100 orders a month, so you can run your first post purchase offer today.

#shopify apps#aov