Last verified July 17, 2026. Every install count below was measured app by app inside TrendTrack on a paid account; prices, ratings and review counts were read on each app’s Shopify App Store listing the same day.
Your store has five jobs to do while you sleep: prove it deserves trust, capture the email, lift the cart, load the page your ad promised, and tell you which of those actually worked.
Apps are how you buy those jobs. The trouble is that almost every “best Shopify apps” list ranks them by star rating, which measures how the merchants who bothered to review felt, not what stores run.
So we came at it from the install side instead. Here is what is actually deployed across 1,873,015 Shopify stores, and which apps earn the slot.
The most widely installed Shopify apps in 2026 are Judge.me (detected on 346,563 stores), Shopify Inbox (273,577) and Klaviyo (263,252), measured across a 1,873,015-store index on July 17, 2026. Reviews, chat and email are the layers stores add first. These counts track apps detected on a store, not paid subscriptions.
Disclosure: some links on this page are affiliate links. If you subscribe through them we may earn a commission at no extra cost to you. The install data in this article was measured on a paid TrendTrack account.
Source: TrendTrack Shops module, measured July 17, 2026.
How we ranked these apps
The ranking criterion is installation, not reputation. An app that sits on hundreds of thousands of storefronts has survived a decision that a star rating never captures: a real merchant kept it.
TrendTrack indexes the 1.87M-store index of Shopify stores and detects the apps running on each one. Its Shops module carries a Shopify App filter that can include or exclude any of 1,000 apps.
Here is the catch that makes this list uncommon: that filter shows no counter next to each app. The theme filter does, the app filter does not.
So we measured them. Include one app, read the store count in the header, repeat. Every number in this article came out that way on July 17, 2026, and you can reproduce any of them in about ten seconds.
| Top 3 at a glance | The job it buys | Price from | Detected on |
|---|---|---|---|
| Judge.me | Trust and social proof | Free, then $15/mo | 346,563 stores |
| Shopify Inbox | Answering buyers | Free | 273,577 stores |
| Klaviyo | Owning the list | Free, then $20/mo | 263,252 stores |
One honest exclusion before the picks. The filter’s catalog mixes real apps with developer aggregates and generic labels, entries like “Sell wider with apps”, “Apps by Mintt Studio” and “Apps by Conversion Bear”. Those are not single apps, so they are out of the ranking entirely.
What 1.87M stores actually install
The top of the list is not a surprise so much as a confirmation: stores buy trust first, then a way to talk to buyers, then a way to own the audience.
Judge.me alone sits on 18.5% of the index. Nearly one Shopify store in five is running the same review widget.
Then the curve falls off a cliff. Fourth place is already down at 105,449 stores, and the ninth app on our list, Vitals, is on 23,984.
Which brings up the thing you need to understand before you read a single one of these numbers as a recommendation.
Read the counts carefully: detection is not a paid subscription. TrendTrack spots an app’s technical footprint on a storefront. Two numbers prove the gap: Candy Rack is detected on 105,449 stores but carries only 186 App Store reviews, and Polar Analytics shows up on 76,608 stores while its entry plan costs $750/mo with no free tier.
Leftover scripts from uninstalls, free plans, trials and shared code can all inflate a footprint. We are not going to pretend we know the exact split for any given app.
What the count does tell you honestly is reach: how normal an app is, how many storefronts carry its code, and therefore how safe a bet it is on compatibility and longevity. Treat it as a popularity signal, not a revenue one.
The 8 apps worth installing in 2026
Order below is editorial, not by install count. The full ranking by footprint is in the comparison table further down.
1. Judge.me: the review layer almost everyone runs
Editor’s pick Reviews
| Price from | Free plan, then Awesome at $15/mo |
| Best for | Every store, from first sale to scale |
| Rating | 5.0 across 39,096 reviews |
| Detected on | 346,563 stores (18.5%) |
Judge.me wins the top slot on a rare combination: it is the most installed app in the index, it holds a 5.0 rating over 39,096 reviews, and its free plan is genuinely usable rather than a demo.
That free tier covers unlimited reviews, photo and video reviews, the widget and Google rich snippets. Paying $15/mo buys AI replies and summaries, 130+ integrations and syndication to Google Shopping, Meta and TikTok Shop.
The honest limit: review apps are a commodity, and Judge.me’s edge is breadth rather than design. If your brand lives on photography, look at Loox below before defaulting here.
Pros: the most usable free tier in the category; the widest install base, so themes and integrations rarely fight it.
Cons: default widgets look generic without CSS work; AI features are paywalled.
Judge.me on the Shopify App Store
2. Klaviyo: own the list before you scale ads
Email and SMS
| Price from | Free to 250 contacts, then $20/mo |
| Best for | Stores spending on ads that need repeat revenue |
| Rating | 4.7 across 2,777 reviews |
| Detected on | 263,252 stores (14.1%) |
Every paid click you buy is rented attention. Klaviyo is how you keep it, and 263,252 stores in the index run it.
The free tier goes to 250 contacts and 150 SMS credits, which is enough to prove the two flows that pay for themselves early: welcome and abandoned cart. Paid email starts at $20/mo for 251 to 500 contacts and climbs with your list.
Be clear-eyed about that curve. Klaviyo is priced on contacts, so a list you never clean gets expensive, and the bill grows whether or not those contacts open anything.
Pros: deepest Shopify data model of any email tool; flows and segments that actually use order history.
Cons: cost scales with list size, not revenue; heavier to learn than a basic newsletter tool.
3. PageFly: build the page the ad promised
CRO
| Price from | Free plan, then Builder at $24/mo |
| Best for | Product testers shipping a new landing page per angle |
| Rating | 4.9 across 5,248 reviews |
| Detected on | 81,711 stores (4.4%) |
A cold visitor who clicks a specific promise and lands on a generic product template is a visitor you paid for and threw away. PageFly exists to close that gap.
The free plan gives you one slot, meaning one page or section, which is enough to test the format before committing. Builder at $24/mo opens five published slots, and Accelerate at $99/mo makes pages and sections unlimited.
Page builders always cost something in weight. Build the page you need and resist stacking every section the template offers.
Pros: 320+ templates and real A/B testing built in; the free slot lets you validate before paying.
Cons: heavy pages if you overbuild; slot-based pricing gets confusing past a handful of pages.
4. Kaching Bundles: lift AOV without a discount
AOV
| Price from | Free to install, Starter at $14.99/mo |
| Best for | Single-product stores selling volume breaks |
| Rating | 5.0 across 4,589 reviews |
| Detected on | 59,849 stores (3.2%) |
Quantity breaks are the cheapest margin lever a small store has: the customer already decided, you are only changing how many.
Kaching handles fixed bundles, mix and match, volume breaks and upsell offers, with A/B testing. Starter runs $14.99/mo, Scale $29.99/mo, Pro $59.99/mo, and the annual terms cut roughly a quarter off.
The 5.0 rating over 4,589 reviews is one of the sturdier signals on this list, since that volume is hard to manufacture.
Pros: cheapest entry of any pick here; bundle types cover most dropshipping offers out of the box.
Cons: narrow scope, it does bundles and nothing else; pricing tiers are order-volume based.
5. Candy Rack: upsell at the moment of intent
AOV
| Price from | Lite at $29.99/mo (free on trial and dev stores) |
| Best for | Stores upselling at cart and checkout |
| Rating | 5.0 across 186 reviews |
| Detected on | 105,449 stores (5.6%) |
Candy Rack places offers across the whole buying journey: product page, cart, checkout and post-purchase, with recommendations powered by Google Gemini.
Pricing is order-banded, which is fair for small stores: Lite at $29.99/mo up to 50 orders, Starter at $39.99/mo to 200, Growth at $59.99/mo to 500. Every plan carries an 8-day trial and a 60-day money-back guarantee.
This is the pick where the detection gap is loudest: 105,449 storefronts carry it against 186 reviews. We rate it on what the product does and what it costs, not on that spread.
Pros: covers all four upsell moments in one app; EU-built with GDPR compliance handled.
Cons: thin review base for its footprint; no free plan on a live store.
6. Loox: photo reviews when the product is visual
Reviews
| Price from | Free plan, Convert at $49.99/mo |
| Best for | Visual products that sell on customer photos |
| Rating | 4.9 across 8,135 reviews |
| Detected on | 33,271 stores (1.8%) |
Loox is the answer to the one thing Judge.me does not do especially well: make the review wall look like your brand chose it.
It is built around photo and video reviews, with discount offers that push customers to send images. The free plan covers review request emails, 17+ widgets and Google rich snippets.
Then it gets expensive. Convert costs $49.99/mo and includes only 300 orders, with $50 per additional 300, and Unlimited jumps to $299.99/mo. Loox is a deliberate spend on visual proof, not a default.
Pros: best-looking review galleries in the category; photo incentives are built in, not bolted on.
Cons: order-metered pricing punishes volume; over three times pricier than Judge.me at entry.
7. Vitals: 40+ tools while the store is young
All in one
| Price from | All-in-One at $29.99/mo, 7-day trial |
| Best for | New stores testing which levers matter |
| Rating | 4.9 across 2,627 reviews |
| Detected on | 23,984 stores (1.3%) |
Vitals bundles over 40 tools into one subscription: reviews, bundles, BOGO, sticky add to cart, wishlists and visitor recordings.
At $29.99/mo it undercuts the stack it replaces, which is the entire argument. Buying reviews, bundles and upsells separately costs more than this before you have any data telling you which one earns its keep.
The trade is depth. Each Vitals module is decent rather than best in class, so stores that outgrow one lever usually replace it with a specialist later.
Pros: one bill and one script instead of six; Built for Shopify badge on performance and design.
Cons: no module is best in class; additional charges kick in as revenue grows.
8. Shopify Inbox: free chat, first-party
Chat
| Price from | Free |
| Best for | Any store that gets asked questions |
| Rating | 4.7 across 5,033 reviews |
| Detected on | 273,577 stores (14.6%) |
Second most detected app in the whole index, and it costs nothing. That alone explains the 273,577 footprint.
Inbox now runs an AI sales assistant that learns from your catalog, policies and store content while you keep control of its tone and rules. Because it is Shopify’s own app, it can personalize replies from purchase history when a customer signs in with Shop.
It is a support tool, not a helpdesk. Stores with real ticket volume outgrow it, but nothing else gives you this much for $0.
Pros: free with no volume cap; first-party, so it will not break on a Shopify update.
Cons: shallow next to a real helpdesk; the AI agent needs your policies written properly to be useful.
The full comparison
Ranked by footprint this time, with the two apps we measured but did not pick included, so you can see the whole picture.
| App | Detected on | Price from | Free plan | Rating |
|---|---|---|---|---|
| Judge.me | 346,563 (18.5%) | $15/mo | Yes | 5.0 (39,096) |
| Shopify Inbox | 273,577 (14.6%) | Free | Yes | 4.7 (5,033) |
| Klaviyo | 263,252 (14.1%) | $20/mo | Limited (250 contacts) | 4.7 (2,777) |
| Candy Rack | 105,449 (5.6%) | $29.99/mo | Limited (dev stores) | 5.0 (186) |
| PageFly | 81,711 (4.4%) | $24/mo | Yes | 4.9 (5,248) |
| Polar Analytics | 76,608 (4.1%) | $750/mo | No | 4.9 (100) |
| Kaching Bundles | 59,849 (3.2%) | $14.99/mo | Limited (free to install) | 5.0 (4,589) |
| Loox | 33,271 (1.8%) | $49.99/mo | Yes | 4.9 (8,135) |
| Vitals | 23,984 (1.3%) | $29.99/mo | No (7-day trial) | 4.9 (2,627) |
Polar Analytics is in the table and not in the picks, deliberately. It is a serious analytics platform, but a $750/mo entry with no free plan and 100 reviews is not a recommendation we can make to a store reading a “best apps” list.
Notice the ranking barely tracks quality. The most installed app is free or nearly free in four of the top five slots, which tells you what stores optimize for when they choose.
See which apps your competitors actually run
The list above is the market average. What usually matters more is narrower: what is the store beating you in your niche running right now? You can screen the app footprint of any store instead of guessing.
Two directions work. Open a single store’s profile and read the apps detected on it, or invert the filter and pull every store running a given app, then sort by traffic to see who runs it well.
Related guide
Shopify Theme Detector & App Finder
Read any store’s theme and app stack, then filter the index by it.
A store profile lists its detected apps next to its pixels, products and traffic, so you read the stack in the context of whether it is working.
One honest note on cost, since this article is about paying for software. The Shops module and its app filter are included from Starter at $59/mo, or $41/mo billed annually. The pricier plans unlock ad spy, which has nothing to do with this job, so check what each TrendTrack plan unlocks before you upgrade for a reason you do not have.
How to choose your stack
Pick by job, never by app count. One app per job that moves a number you already track, and zero apps for a job you cannot measure yet, is a rule that survives contact with a real store. If you are still building the store around these decisions, the full Shopify dropshipping guide covers the order to do it in.
Then remember the real bill. Six apps at $20/mo is $120 a month plus six scripts on every page load, which is the argument for an all-in-one like Vitals early and specialists later.
Which apps is the store outselling you running?
Screen 1,873,015 Shopify stores by the apps they run, include or exclude any of 1,000 apps, and read any competitor’s full stack. Included from Starter, $59/mo or $41/mo billed annually.
FAQ
What apps do most Shopify stores use?
Across the 1,873,015 stores indexed by TrendTrack on July 17, 2026, the most widely detected apps are Judge.me (346,563 stores), Shopify Inbox (273,577) and Klaviyo (263,252). Reviews, chat and email are the three layers most stores add first. Keep in mind these counts reflect apps detected on a store, not paid subscriptions.
How many apps should a Shopify store run?
There is no magic number, and app count is the wrong metric. Every app you install adds scripts to your storefront, a monthly line to your bill, and one more thing to maintain. A good rule: one app per job that actually moves a number you track, and none for a job you cannot measure yet.
Are free Shopify apps good enough?
Often yes, at the start. Judge.me, Loox, PageFly and Klaviyo all ship real free tiers, and Shopify Inbox is free outright. The free plans usually cap volume or hide AI and integrations rather than crippling the core job, so they carry a new store to its first sales before you pay.
Do Shopify apps slow down your store?
Most apps inject JavaScript into your theme, so yes, each one costs some load time. The cost is not equal: a review widget rendering on every product page weighs more than a backend tool. Uninstalling rarely removes every leftover script, which is one reason detection tools still spot apps on stores that stopped paying.
How do I see which apps a competitor’s store uses?
Open the store’s profile in TrendTrack’s Shops module and read its detected Shopify Apps block, or work the other way and filter the whole index by app with Include and Exclude. The free TrendTrack Chrome extension also x-rays a single store from the storefront. Shops and its app filter are included from the Starter plan.