A fashion catalog puts specific demands on every app in the stack. Check these points before you install.
- Sizes and colors. Every product comes in several variants. Look for filters by size and color, a swatch for each color on collection pages, and exchanges for another size.
- Customer photos. Shoppers want to see the piece on a real person. Look for photo and video reviews, requested after delivery, once the customer has tried the item on.
- Fit before and after the order. A size chart helps before the purchase. After it, the returns app should make an exchange as easy as a refund. Set the rules first: our guide to writing a Shopify return policy covers the return window, return shipping cost and final sale items.
- Drops and sell-outs. Limited runs sell out. Waitlists, restock alerts and pre-orders keep that demand, and WhatsApp reaches customers the moment a drop goes live.
- Pricing that follows your volume. Many apps charge by orders, returns, GMV, collection views, bundle sales or wishlist actions. Price your busiest month, not an average one.
- Overlap between apps. Boost lists pre-order and back in stock on its entry plan and, like KX AI Collection Sort, pins and reorders products in a collection, Notify Me! adds a guest wishlist, Swym sends restock and price drop alerts, and Color Swatch King links a size chart. Check what your apps already do before you add another.
Need covered: size guidance and fit.
Kiwi Size Chart & Recommender, by Staytuned, adds customizable size charts and AI-powered size recommendations to your product pages, with more confident purchases and fewer returns as the stated goal. You can import size charts from images, product descriptions or a CSV file, start from 22 pre-built templates, and combine several size tables, images, videos and tabs in one chart. Size guides can apply per product or per collection and attach automatically to new products, and the sizing unit adapts to the customer's location. The free plan publishes up to 3 size charts, with a Kiwi watermark. Premium costs $7.99/month (10 charts, Google Analytics integration, no watermark), Plus $14.99/month (20 charts, up to 10 size recommenders and their performance analytics) and Ultimate $26.99/month (unlimited charts and recommenders, charts translated into 22 languages). Plus and Ultimate add charges based on order volume, and paid plans include a 14-day free trial. Rated 4.7/5 from 1,245 reviews, Kiwi is worth a look if shoppers often ask which size to take.
Need covered: photo and video reviews.
Judge.me Product Reviews collects product and store reviews with photos and videos, and its Forever Free plan keeps both unlimited. Review requests go out automatically after fulfillment or delivery, by email, SMS or push, and reviews appear in widgets, star rating badges, testimonial sliders and video carousels. For a clothing store, customer photos show how a piece looks when worn. The free plan also covers Google reviews sync and rich snippets, trust badges, sync with the Shop App, Etsy and Amazon, and a reviews importer. Awesome costs $15/month, with a 15-day free trial, and adds AI replies, summaries and translations, 16 widgets including Q&A and a reviews page, auto-reminders, coupons and referrals, Google Shopping, Meta and TikTok Shop sync, and 130+ integrations such as Klaviyo and Gorgias. Rated 5/5 from 50,065 reviews, Built for Shopify and a 2025 Build Award winner, Judge.me is worth a look if you want photo reviews at a low fixed price. Kanal's WhatsApp review requests sync with Judge.me.
Need covered: photo and video reviews.
Loox is built around visual reviews. It collects photo and video reviews automatically with emails, QR codes and discounts, and shows them in on-brand, mobile-optimized widgets. Its AI features sort the best visual reviews first, highlight key quotes, summarize and translate reviews and draft replies. Reviews sync to and from the Shop App and to Meta Shops, Google Shopping and TikTok Shop, Loox Studio turns reviews into social posts and stories, and the app rewards customer referrals. The free Beginner plan covers up to 500 orders, with review request emails and reminders, discounts for photo reviews, 17+ widgets and Google rich snippets. Convert costs $49.99/month for 300 orders, plus $50 per additional 300 orders, and adds video reviews, the AI features, reviews on product bundles and syndication to Google, Meta and TikTok. Unlimited costs $299.99/month, and paid plans include a 14-day free trial. Rated 4.9/5 from 10,082 reviews and Built for Shopify, Loox is worth a look if photo reviews are central to how you sell. More options in our Shopify review apps comparison.
Need covered: returns and exchanges.
AfterShip Returns & Exchanges automates the return process and aims to convert refunds into exchanges or store credit, with incentivized and personalized exchange offers and fraud checks. Customers use a branded returns page, while rules and automation handle approvals, refunds and updates in the back end. Built-in analytics surface the product and listing issues behind returns. It adds discounted labels and in-store returns through Shopify POS, and works with Canada Post, FedEx, UPS, USPS and Gorgias. The Return Care plan is listed as free: returns are funded by shoppers, labels are handled by AfterShip and a revenue share applies. Essentials costs $19/month ($1 for the first month) with 20 returns a month and $0.50 per extra return. Premium costs $119/month with 100 returns, $1 per extra return, advanced workflows, AI-powered exchanges, fraud prevention and a warranty portal. Both include a 7-day free trial. Rated 4.7/5 from 1,546 reviews and Built for Shopify, AfterShip Returns is worth a look if you want exchanges and store credit at a low entry price.
Need covered: returns and exchanges.
Loop Returns & Exchanges automates what happens after checkout: returns, exchanges, order editing, tracking and fraud prevention. Shoppers get simple, self-serve returns and, if you offer it, at-home pickup. To keep the sale, Loop encourages exchanges with Bonus Credit, Shop Now and Instant Exchanges, while Workflows, Custom Rules and Blocklists protect against return fraud. Workflows, logistics and Point of Sale options help cut return costs, Tracking builds shopper confidence, and Intelligence shows customer behavior. It works with Shopify POS and Flow, Klaviyo, Gorgias, Attentive, Global-E, NetSuite and ShipHero. The Checkout+ plan is listed as free for brands with 5,000+ annual orders and includes the returns software, US and Canada domestic return labels, Return Bars, advanced features and package protection. The paid Returns plan starts at $340/month and includes up to 1,000 returns a year, with Shop Now, Instant Exchange, Bonus Credit and fraud prevention. Rated 4.6/5 from 449 reviews, Loop is worth a look if exchanges sit at the center of your returns policy.
Need covered: customer messaging, from drop announcements to review requests.
Kanal turns WhatsApp into a sales channel for e-commerce brands, on the official WhatsApp Business API, with Shopify data inside every conversation. Announce a drop with a scheduled WhatsApp campaign built with images and buttons, then track clicks and revenue per campaign. When a product sells out, customers join the waitlist with one tap (a WhatsApp button on the product page, a QR code or a message to your number) and receive an automatic restock alert with the product photo and a buy link. Automations triggered by Shopify events send abandoned cart reminders with product images and prices, complementary products after an order, and a review request after delivery, answered with photos and videos that sync with Judge.me, Loox or Shopify reviews. An AI agent answers sizing, shipping and return questions 24/7 in 96+ languages. Rated 5/5 on the Shopify App Store, Kanal starts at €89/month, with a demo on request. The AI agent and segments are not part of the entry plan.
Need covered: product search and filters.
Boost AI Search & Filter, by Boost Commerce, is a product discovery app. Its AI search returns instant, relevant results even with typos, vague searches or large catalogs, and its filters can use tags, metafields and variants, so shoppers can narrow a collection by size or color. Merchandising lets you pin, boost or reorder products to showcase top sellers, and AI bundles and personalized recommendations aim at a bigger cart. Languages, currencies and marketplaces stay synced across storefronts. It works with Klaviyo, Weglot and langify, and with review apps such as Judge.me, Loox, Yotpo and Growave. Pricing is based on online GMV: Launch starts at $29/month (up to $159/month for stores under $50K of monthly GMV) with 5 custom filter trees, AI search, 10 merchandising campaigns, recommendations and bundles, and pre-order and back in stock. Convert starts at $299/month and Accelerate at $699/month, and each plan has a 21-day free trial. Rated 4.7/5 from 1,627 reviews, Boost is worth a look if shoppers rely on filters to browse a large catalog.
Need covered: product search and filters.
Searchanise Search & Filter adds a smart instant search bar that shows relevant results on every store page, with personalized AI search and voice search. Filters are unlimited, from the default ones to tag filters and custom filters, and the live search results page and product cards are configurable. The search plugin also covers collection filters, product labels and product variants, and Search Analytics shows product trends. Merchandising tools and upsell recommendations aim at order value. It works with Judge.me, Shopify Product Reviews, Yotpo, Stamped, Langify and Wishlist Plus. The free plan is for development stores and stores with fewer than 25 products, with unlimited queries, advanced filters, AI personalization, analytics and a Searchanise copyright. Basic costs $19/month for up to 1,500 products and adds integrations and voice search, Essential $39/month for up to 7,500 products, and Basic for Plus $49/month for Shopify Plus stores, each with a 14-day free trial. Rated 4.7/5 from 1,266 reviews, Searchanise is worth a look if you want search and filters priced by the size of your catalog.
Need covered: collection sorting and merchandising.
KX AI Collection Sort, by Kimonix, is a no-code AI collection sort and merchandising platform. It sorts, pins and groups the products of a collection using 100+ data parameters, among them revenue, conversion, margin, inventory, size availability, returns and reviews, and the listing presents it as install and go, with no heavy implementation. AI sorting keeps manual control through drag and drop, pinning and product grouping, and segmented sorting balances new arrivals, best sellers, product types and colors within a collection. Its feature list also includes custom rules, push down and hide actions, real-time updates, bulk editing and analytics. The same engine runs 1:1 personalization of product recommendations, collections and email campaigns, A/B tests of merchandising strategies and a separate sort for each market, with local data and inventory. For a clothing store, size availability and returns are among the signals a collection can be sorted on. It works with Klaviyo, Loop Returns, Loox, Stamped, Tapcart and Yotpo. The listing shows one plan, Pay As You Go at $19/month: the $19 comes back as usage credits, then each impression (a collection view, a recommendation or an email open) costs 0.6¢ to 0.04¢. It covers 200 managed collections, product recommendations with 10 elements, personalized emails, Markets integration, Triple Whale, Loop and Yotpo integrations and automatic updates 4 times a day, with a 14-day free trial. Rated 5/5 from 244 reviews and Built for Shopify, KX AI Collection Sort is worth a look if you want collection pages ordered by revenue, inventory and size availability rather than by hand.
Need covered: bundles and complete-the-look offers.
FBP: Fast Bundles & Upsell App (formerly Fast Bundle & Upsell App), by Fast Bundle, builds bundle and upsell offers for product pages: mix and match bundles, fixed bundles, BOGO, Buy X Get Y, free gifts with purchase and build-your-own kits with its Bundle Builder. AI-powered frequently bought together suggestions, product add-ons and cross-sells help customers add complementary items before checkout, and volume discounts and quantity breaks reward larger orders. Its feature list includes variant bundles, and offers also work on Shopify POS. In a clothing store, a mix and match bundle can turn a top, a bottom and an accessory into one outfit offer. The app is free on development stores. Paid plans are priced by monthly bundle sales: Standard costs $19/month up to $1,000, $49/month up to $3,000 and $139/month up to $10,000, each with unlimited bundles, an AI bundle image generator and a 7-day free trial, and Auto Bundle Detection is an optional add-on at $49/month. Rated 5/5 from 3,663 reviews, FBP: Fast Bundles is worth a look if you want outfit bundles on the product page. Our Shopify bundle apps comparison covers more options.
Need covered: back in stock alerts and pre-orders.
Notify Me! Back in Stock Alert adds Notify Me, PreOrder or Wishlist buttons to out-of-stock products on product, home and collection pages, then sends restock alerts automatically by email, SMS, push or WhatsApp. It accepts D2C and B2B pre-orders with discounts and partial payments, and its feature list covers product drops, variants, split payments and payment schedules. An "only X left" counter shows low stock, and the guest wishlist works without logging in. Reports cover customer demand and sales forecasting, and it works with Klaviyo, Mailchimp, Omnisend, PushOwl and PageFly. The free Lite plan includes 10 restock notifications, 5 pre-orders and 50 wishlist actions. Kickstart costs $9.90/month (500 alerts, 500 pre-orders, 2,000 wishlist actions), Starter $19.90/month and Standard $39.90/month, with unlimited plans inside the app and a 7-day free trial. Rated 4.9/5 from 4,015 reviews and Built for Shopify, Notify Me! is worth a look if you sell limited drops and pre-orders. Our back in stock apps comparison covers more tools, including restock alerts on WhatsApp.
Need covered: wishlists.
Swym Wishlist Plus, by Swym Corporation, lets shoppers save favorites, sort them into multiple wishlists and come back later, including anonymous wishlists for shoppers who are not logged in. Wishlists can be shared by email, SMS, social media or a direct link. Automated emails and SMS send wishlist reminders and restock and price drop alerts, and sales staff can open customer wishlists in Shopify POS. Reports cover shopper behavior, and a Customer Accounts extension tracks wishlists and browsing activity. It integrates with Klaviyo, Attentive, Omnisend, Postscript, Mailchimp, Yotpo and Tapcart, and with Shopify Sidekick, so you can customize it with AI prompts. There is no free plan: Starter costs $29.99/month (3,000 wishlist actions a month), Pro $59.99/month (10,000 actions, Meta ads retargeting, customer segments) and Premium $99.99/month (25,000 actions, REST APIs and a JavaScript SDK), each with a 30-day free trial. Rated 4.7/5 from 1,478 reviews, Swym is worth a look if your customers save items before they buy.
Need covered: variants and color swatches.
Color Swatch King: Variants, by StarApps, replaces the plain variant dropdown with color swatches, image swatches, buttons or dropdowns that can show prices, labels and badges. On collection pages, shoppers see each product's colors as swatches instead of a single product image. You can add New, Sale and Sold-out badges, grey out out-of-stock combinations, hide out-of-stock variants, link a size chart and bulk upload color swatches by CSV. A variant image can become a swatch, the app shows live analytics, and it works with Shopify Markets and B2B. The listing also mentions free setup by its product variant experts. Pricing follows your Shopify plan: $14.90/month on Shopify Basic, $29.90 on Grow and Custom, $49.90 on Advanced and $99.90 on Plus, or $5/month on the Pause and Build plan, with a 30-day free trial. The free plan is for partner, staff and trial stores. Rated 5/5 from 3,221 reviews and Built for Shopify, Color Swatch King is worth a look if your products come in many colors.
Kanal does not replace a size chart, a review widget or a returns portal. It adds the channel where customers read and reply, and it connects to the apps above where it matters.
| Need | Apps in this list | What Kanal adds on WhatsApp |
|---|
| Size and fit | Kiwi | An AI agent that answers sizing questions 24/7 in 96+ languages |
| Reviews | Judge.me, Loox | Review requests after delivery, with photos and videos that sync with Judge.me, Loox or Shopify reviews |
| Returns | AfterShip, Loop | AI customer service for order tracking and return questions, with escalation to your team |
| Bundles | FBP: Fast Bundles | Complementary product recommendations after the purchase, with post-purchase discount codes |
| Restocks | Notify Me! | One-tap opt-in and restock alerts with a product photo and a buy link |
| Drops and campaigns | None of the above | Scheduled campaigns with images and buttons, with delivery, clicks and revenue per campaign |
| Abandoned carts | None of the above | Multi-step reminders with product images, names, prices and discount codes |
Pro, at €89/month, covers one user with the chat widget and inbox, abandoned cart recovery and WhatsApp campaigns. The AI agent and segments are not part of this entry plan. Scale, at €149/month, adds the AI agent, segments, advanced automations and the Klaviyo integration for five users. Meta's messaging fees are passed through at cost, with no commitment.
| App | Free plan | Entry price | Plans scale with | Usage fees on the listing |
|---|
| Kanal WhatsApp | Demo on request | €89/month | Flat monthly plan | WhatsApp messaging fees |
| Kiwi Size Chart & Recommender | Yes (3 size charts) | $7.99/month | Size charts and recommenders | Charges by order volume on Plus and Ultimate, optional import credits |
| Judge.me Product Reviews | Yes (unlimited reviews) | $15/month | Features (two plans) | None listed |
| Loox | Yes (up to 500 orders) | $49.99/month | Orders | $50 per additional 300 orders on Convert |
| AfterShip Returns & Exchanges | Yes (Return Care, shopper-funded) | $19/month | Returns per month | $0.50 per extra return (Essentials), $1 (Premium) |
| Loop Returns & Exchanges | Yes (Checkout+, brands with 5,000+ annual orders) | $340/month | Returns per year (up to 1,000 on the Returns plan) | None listed |
| Boost AI Search & Filter | No (21-day trial) | $29/month | Online GMV | None listed |
| Searchanise Search & Filter | Yes (under 25 products) | $19/month | Number of products | None listed |
| KX AI Collection Sort | No (14-day trial) | $19/month, returned as usage credits | Impressions (collection views, recommendations, email opens) | 0.6¢ to 0.04¢ per impression beyond the credits |
| FBP: Fast Bundles (formerly Fast Bundle) | Dev stores only | $19/month | Monthly bundle sales | Optional Auto Bundle Detection, +$49/month |
| Notify Me! | Yes (10 restock alerts, 5 pre-orders) | $9.90/month | Alerts, pre-orders and wishlist actions | $0.15 to $0.20 per pre-order above the limit, SMS priced by country |
| Swym Wishlist Plus | No (30-day trial) | $29.99/month | Wishlist actions per month | None listed |
| Color Swatch King | Partner, staff and trial stores | $14.90/month (Shopify Basic) | Your Shopify plan | None listed |
Paid entry plans range from $7.99/month (Kiwi) to $340/month (Loop), and most grow with your volume, so a busy season can push you into a higher tier. A starter stack of Kiwi Premium, Judge.me Awesome, AfterShip Essentials and Searchanise Basic costs $60.99 a month. Kanal works differently: a flat monthly plan from €89 plus WhatsApp messaging fees, with campaigns and abandoned cart recovery on the same plan.
Start with the questions your customers ask most, then give each job to one app, so nobody receives the same alert twice.
- You are launching. Kiwi's size charts and Judge.me's reviews both start on a free plan.
- Customers ask about sizes before they buy. Kiwi for size charts, and Kanal's AI agent for sizing questions on WhatsApp.
- Returns weigh on your margin. AfterShip Returns from $19/month, or Loop if exchanges are the core of your policy.
- Your catalog keeps growing. Boost or Searchanise for search and filters, KX AI Collection Sort to order collection pages on revenue and size availability, and Color Swatch King for color swatches.
- You sell drops and limited runs. Kanal to announce the drop and send restock alerts on WhatsApp, and Notify Me! for pre-orders.
- You want a bigger basket. FBP: Fast Bundles for outfit bundles, and Kanal's post-purchase recommendations after the order.
- Customers save items for later. Swym Wishlist Plus, which also sends price drop and restock alerts.