There are more than 8,000 apps in the Shopify App Store, and most “best apps” lists just dump forty of them on you.
This list is different. We build and manage Shopify stores for 30+ brands, and these are the apps we actually install when a client asks us to increase sales — in the order we install them. Every rating below is from the Shopify App Store as of September 2026.
1. A review app first — we use Judge.me
If you install only one app to boost sales, make it a review app. Nothing else moves conversion like social proof — a store with empty review sections is asking visitors to take your word for it, and they won’t.
The app you pick should do two things well: actively help you get more reviews (automatic request emails after delivery), and make it genuinely easy for the customer to post one — photo uploads, no login walls, review in two taps from the email itself.
For that combination we use Judge.me (5.0 stars, 46,000+ reviews) on most client stores: unlimited review requests even on the free plan, and the request emails convert well because customers can submit without friction.
- Best for: every store — this is the non-negotiable one
- Pricing: free plan; paid from $15/month
We’ve compared all the major options in our review apps comparison if your store has specific needs (visual products, dropshipping imports).
2. Email & SMS for your existing customers — Klaviyo
Most stores obsess over new traffic while ignoring the cheapest sales they’ll ever make: the people who already bought from them.
Keep notifying past customers about coupons, new offers and new arrivals. That’s what an email marketing app is for, and we deploy Klaviyo (4.7 stars, 3,200+ reviews) because it doesn’t stop at email — it lets you text your customers too, from the same segments and the same flows.
The flows we set up first on client stores: abandoned cart, welcome series, and a post-purchase offer. Those three alone typically become a store’s most profitable channel.
- Best for: repeat revenue from your existing customer base
- Pricing: free tier; paid scales with list size
3. An AI chatbot that sells — Vachika (yes, we built it)
Full disclosure: this one is ours. We built Vachika AI after years of watching client stores lose night-time and weekend sales to unanswered questions.
What makes it different from a support-ticket chatbot is that it works as a customer support agent and a salesperson at the same time — it reads your Shopify catalog, so when a visitor asks “will this work for X?”, it answers the question and recommends the right product, the way your best floor rep would. When someone needs a human, it hands the chat to you, with an Android app so you can take over from anywhere.
It’s brand new on the App Store, and there’s a free trial with no card required — try it and tell us what to improve.
- Best for: recovering the sales that happen while you sleep
- Pricing: free trial; paid from $10/month
More about how it works on our Vachika page.
4. AI product photography — OpenAI & Google Gemini
This one isn’t a Shopify app, but it belongs on this list because photos are everything in e-commerce — and this is the newest lever in our toolkit.
Instead of paying for a studio reshoot every time you need lifestyle shots, we now use AI image tools — OpenAI’s image generation and Google Gemini — to upgrade product shots: cleaner backgrounds, lifestyle scenes around an existing product photo, seasonal variants of the same hero image.
Two rules from our experience: always start from your real product photo (never generate the product itself — customers notice, and returns punish you), and keep one consistent style across the catalog so the store doesn’t look stitched together.
- Best for: stores whose product pages look flat next to competitors
- Pricing: both tools have free tiers to start
5. Watch real visitors use your store — Microsoft Clarity
You cannot fix what you cannot see. Microsoft Clarity (4.6 stars, 2,100+ reviews) records real sessions on your store so you can watch firsthand how users actually interact with it — where they hesitate, what they rage-click, which dead links or broken elements are quietly killing checkouts.
We install it on every store we optimize, and it regularly finds problems no report would surface: a size chart that won’t open on Android, a footer link 404ing, a popup covering the add-to-cart button on one screen size. It’s completely free, which makes not installing it hard to justify.
- Best for: finding the invisible problems that block sales
- Pricing: free
6. A conversion-friendly cart — cart drawer & upsell apps
The default Shopify cart is where a lot of conversions quietly die — a full page reload, no nudge toward free shipping, no related products. A cart CRO app replaces it with a slide-out cart drawer that keeps shoppers in flow and makes the cart itself sell: a free-shipping progress bar, one-tap add-ons, sticky add-to-cart.
Solid options here include Kaching CartDrawer (5.0 stars, 1,300+ reviews, free plan) and iCart (4.7 stars). The exact app matters less than the pattern: make the cart friendly to convert in, not just a list of line items.
- Best for: lifting average order value and cutting cart abandonment
- Pricing: free plans available on both
A warning about installing too many apps
Every app you add loads scripts on your storefront, and a slow store loses more sales than any app can add. Our rule with clients: install for a specific problem, measure for 30 days, uninstall anything that didn’t move a number you care about. Six well-chosen apps beat twenty overlapping ones — in revenue and in page speed.
Apps can’t fix a store that doesn’t convert
The stack above works when the fundamentals underneath it work — fast theme, clear product pages, trust signals in the right places. If your store gets traffic but sales don’t follow, that’s a conversion problem before it’s an app problem, and it’s exactly what our Shopify CRO service diagnoses and fixes. And if you want any of these apps installed and configured properly, our Shopify development team does it every week.
Which app moved the needle most on your store? Tell us in the comments.