Increase your sales by creating countdown timers, banners and offers inside the theme editor Scala Scarcity & Urgency enables you to create countdown timers and banners. You can customize the color, message, spacing, date and preview how your store will look inside the theme editor, before publishing changes. The timers countdown use mostly CSS and minimal javascript, so it doesn't make your store slower. Scala Scarcity & Urgency enables you to create countdown timers and banners. You can customize the color, message, spacing, date and preview how your store will look inside the theme editor, before publishing changes. The timers countdown use mostly CSS and minimal javascript, so it doesn't make your store slower. more Countdown timer with start and end date, or automatic renewal Banner with countdown and promotion link Low stock scarcity bar Cart urgency messaging
Custom CSS Shopify Apps
Discover the best Custom CSS apps for your Shopify store in 2026. Compare features, pricing, and reviews to find the perfect solution.
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Increase your sales with Scalapay On-site Messaging Thanks to this customizable app, Scalapay On-site Messaging informs your customers about the Scalapay payment methods available in your store. Our app helps you create tailored messages to promote your partnership with Scalapay wherever you like, in product and cart page. Make sure Scalapay is active as a payment method at your checkout. Download the app and activate Scalapay On-site Messaging. Now tell your customers that they can shop with Scalapay and see your sales grow! Thanks to this customizable app, Scalapay On-site Messaging informs your customers about the Scalapay payment methods available in your store. Our app helps you create tailored messages to promote your partnership with Scalapay wherever you like, in product and cart page. Make sure Scalapay is active as a payment method at your checkout. Download the app and activate Scalapay On-site Messaging. Now tell your customers that they can shop with Scalapay and see your sales grow! more Promote to customers the availability of Scalapay payment method and boost sales Tailor and personalize your messaging to maximize cart conversions Add the Scalapay widget and pop-up to your product and cart page
Spark FOMO & drive urgency with a sales countdown timer that instantly boosts your ROI! Stop cart abandonment and compel shoppers to buy! Scarcity+ is the ultimate countdown timer app. Build massive urgency from the homepage to checkout. Use a highly visible timer bar and our signature cart timer to reserve items, forcing buyers to act fast. Apply 1-click holiday presets (Mother's Day, Black Friday & more) or build a hardcore countdown setup. We turn hesitation into revenue. Install today to spark FOMO and boost your sales! Stop cart abandonment and compel shoppers to buy! Scarcity+ is the ultimate countdown timer app. Build massive urgency from the homepage to checkout. Use a highly visible timer bar and our signature cart timer to reserve items, forcing buyers to act fast. Apply 1-click holiday presets (Mother's Day, Black Friday & more) or build a hardcore countdown setup. We turn hesitation into revenue. Install today to spark FOMO and boost your sales! more Sticky announcement bar timer and Sale timer bar for storewide promotions. Easily place a product timer, countdown banner, or fixed-date timer. Auto-empty carts when the cart countdown hits zero to create real scarcity. Add a pre-checkout timer or simple time clock to lock in orders fast. Customize your countdown clock and basic timer text effortlessly using AI.
Schedule multiple bars to run at specific times, maximizing customer engagement and sales impact! Empower your Shopify store with Scheduler Bar - Announcements. From small boutiques to large enterprises, our app transforms your marketing strategy. Elevate sales with attention-grabbing bars for promotions, coupon codes, free shipping goals, and countdown timers. Simplify customer engagement, drive urgency, and enhance conversion rates effortlessly. Customize and manage bars seamlessly for a dynamic, versatile marketing approach. Elevate your business - install Scheduler Bar today! Empower your Shopify store with Scheduler Bar - Announcements. From small boutiques to large enterprises, our app transforms your marketing strategy. Elevate sales with attention-grabbing bars for promotions, coupon codes, free shipping goals, and countdown timers. Simplify customer engagement, drive urgency, and enhance conversion rates effortlessly. Customize and manage bars seamlessly for a dynamic, versatile marketing approach. Elevate your business - install Scheduler Bar today! more Simple Bar: Easily create simple text bars for quick announcements. Coupon Code: Combine compelling text with dynamic coupon codes. One-click copy. Free Shipping Bars: Configure free shipping goals and display corresponding bars Counter Time: Countdown timers for flash sales or limited-time offers. Customize fonts, colors, and positioning for a seamless fit with your store.
Allows the visitor to easily scroll back to top of the page AD Scroll To Top allows the visitor to easily scroll back to the top of the page, with fully customizable options and images. #Visualize your button design What you see is what you get by using a button designer, you can change the button position, size, style, transparency to fit your website. Meanwhile, you can preview your "button design" to see the real effect. AD Scroll To Top allows the visitor to easily scroll back to the top of the page, with fully customizable options and images. #Visualize your button design What you see is what you get by using a button designer, you can change the button position, size, style, transparency to fit your website. Meanwhile, you can preview your "button design" to see the real effect. more Easy to setup and no coding skill required for show button. Your customer will stay in your store longer if they know your store is flexible Speed is our top priority, everything is minified and subsetted.
Add a stylish scroll to top button to your store that matches your style. One click installation. Scrolly allows you to ease your customers shopping experience in one click by adding a floating back to top button that allows them to easily navigate back to the top of the page. Smoothing customers' shopping experience can increase conversions. Scrolly is highly customizable and you can change the button's color, shape, size, hover color, position on the page, horizontal and vertical distances (padding), animation and whether it will be shown in the entire store or just in specific pages. Scrolly allows you to ease your customers shopping experience in one click by adding a floating back to top button that allows them to easily navigate back to the top of the page. Smoothing customers' shopping experience can increase conversions. Scrolly is highly customizable and you can change the button's color, shape, size, hover color, position on the page, horizontal and vertical distances (padding), animation and whether it will be shown in the entire store or just in specific pages. more Ease your customers shopping experience with a colorful back to top button. Fully matches your store's style: Custom color, shape, size, animation & more. Control the appearance location: In the entire store or just in specific pages. Multiple shapes and styles are available, unlimited color and size options. Easy one click installation & universal theme support - no code is required.
Calculation based option pricing for customizable products. Advanced product pricing made simple. Perfectly price your customizable and measurement-based products. Specifically designed for sticker, blind, wallpaper, cabinet makers, fabric, counters & parts stores. Use mathematical pricing formulas to calculate option, quantity, weight & discount pricing without limits. Pricing table and vlookups support make complicated pricing easy. Show discounted pricing for options with quantity breaks. Start pricing your products perfectly, get Option Price Calculator. Perfectly price your customizable and measurement-based products. Specifically designed for sticker, blind, wallpaper, cabinet makers, fabric, counters & parts stores. Use mathematical pricing formulas to calculate option, quantity, weight & discount pricing without limits. Pricing table and vlookups support make complicated pricing easy. Show discounted pricing for options with quantity breaks. Start pricing your products perfectly, get Option Price Calculator. more Price custom & measurement-based products more accurately than your competition Use pricing tables and formulas for more dynamic & accurate option pricing. Use product & variant metafields as variables in your calculations and formulas. Unlimited product options: Swatch, Upload, Multi-select, Dropdown, Radio & more. Create rules to show and hide options based on options selected.
One click installation to add scroll to top button in your store. If you have long pages with a lot of content or products, and your pages are experiencing high bounce rates, this app will make browsing and shopping easier. Creating a happy browsing experience for potential customers is imperative for increasing conversion rates and reducing page bounce rates. with the SealGlobal Scroll to Top app, visitors can instantly get back to the top of the page. If you have long pages with a lot of content or products, and your pages are experiencing high bounce rates, this app will make browsing and shopping easier. Creating a happy browsing experience for potential customers is imperative for increasing conversion rates and reducing page bounce rates. with the SealGlobal Scroll to Top app, visitors can instantly get back to the top of the page. more Easy to setup and universal theme support. Browse long pages easier with flexible scroll to top button. Matches your store style like shape, size, color, button position etc.
AI-powered search and filters for smarter product discovery that helps turn searches into sales ExpertRec AI Search enhances search and discovery with customizable filters for price, collection, vendor, brand, color, size, tags, and metafields. It supports product variants, collection filters and sorting, and sidebar filters to simplify browsing. The search experience includes instant suggestions, autocomplete, autocorrect, and spell check to provide relevant results quickly. All features are configurable in the ExpertRec control panel. ExpertRec AI Search enhances search and discovery with customizable filters for price, collection, vendor, brand, color, size, tags, and metafields. It supports product variants, collection filters and sorting, and sidebar filters to simplify browsing. The search experience includes instant suggestions, autocomplete, autocorrect, and spell check to provide relevant results quickly. All features are configurable in the ExpertRec control panel. more AI-Powered Search with Voice, Image & ChatGPT Agentic Smart Autocomplete with Typo Correction & Ranking Controls Filter Trees for easy filter reuse across collections and search Advanced Collection & Search Filters with Analytics Fully Customizable Search UI with GA4 Tracking & Variant Support
Boost your online store sales with our predictive instant search and product filters Help customers discover products in seconds using our smart search app, combined with advanced filters. No coding skills? No problem! Our widgets come with a sleek, easy to customize design. The search plugin works out of the box and is also highly customizable: instant search bar, individual collection filters, product labels, Add to cart, merchandising, variants as separate products, etc. Improve retention and conversions by streamlining product discovery. Enjoy our responsive support team! Help customers discover products in seconds using our smart search app, combined with advanced filters. No coding skills? No problem! Our widgets come with a sleek, easy to customize design. The search plugin works out of the box and is also highly customizable: instant search bar, individual collection filters, product labels, Add to cart, merchandising, variants as separate products, etc. Improve retention and conversions by streamlining product discovery. Enjoy our responsive support team! more Smart & Instant Search Bar shows relevant search results across all store pages Voice search & Personalized AI search for a seamless user experience Unlimited out-of-the-box and custom filters by default ones,tag filters,prefixes Configurable live search results page & product cards’ content Merchandising tools & upsell product recommendations to boost AOV and sales
Grow Conversions & Order Value with Free Shipping Bars, Countdown Timers & Cross-Sell Pop-Ups Vital on-site marketing tools to drive sales, boost conversions, and increase AOV. Create personalized campaigns with GEO-based Free Shipping Bars, Countdown Timers, Pop-ups, and Multi-Announcement Bars. Collect emails with discounts & Store Credits, engage shoppers with notifications, and enhance UX with a Scroll to Top Button. Lift your order value effortlessly with perfectly timed cross-sell pop-ups that inspire shoppers to add a little more. Powered by analytics. Install now and grow today! Vital on-site marketing tools to drive sales, boost conversions, and increase AOV. Create personalized campaigns with GEO-based Free Shipping Bars, Countdown Timers, Pop-ups, and Multi-Announcement Bars. Collect emails with discounts & Store Credits, engage shoppers with notifications, and enhance UX with a Scroll to Top Button. Lift your order value effortlessly with perfectly timed cross-sell pop-ups that inspire shoppers to add a little more. Powered by analytics. Install now and grow today! more Increase order value by motivating shoppers with well-timed Сross-sell Pop-ups Use the Free Shipping Bar to boost the vital metric – average cart value Add a variety of customized banners to increase conversions and drive sales Collect customer emails with the Email Collection Bar & Discount Pop-ups Gather vital data to make informed decisions to maximize your sales
Vehicle Year/Make/Model Lookup with Faceted Navigation and Search Engine Friendly URLs A fitment lookup that features everything you need to succeed, managed and supported by experienced automotive parts & accessories entrepreneurs. Our team provides solutions to help your ecommerce business, not just apps. We are down to earth, direct, and serious about helping you focus on growth. The Fitment Lookup enables you to more efficient manage fitment options, and allows customers to easily filter products an validate fitment - improving conversion rate and reducing returns. A fitment lookup that features everything you need to succeed, managed and supported by experienced automotive parts & accessories entrepreneurs. Our team provides solutions to help your ecommerce business, not just apps. We are down to earth, direct, and serious about helping you focus on growth. The Fitment Lookup enables you to more efficient manage fitment options, and allows customers to easily filter products an validate fitment - improving conversion rate and reducing returns. more US Service and Support from Automotive eCommerce Veterans Dynamic, Category-Specific Qualifiers - Don't Prompt for What Doesn't Matter! Saved Vehicle Search, My Garage & Product Page Fitment Validator Search Engine Friendly URLs for Dynamic Vehicle & Facet Pages Guided Install Requires SearchAuto Support, Not Plug-n-Play, Contact Us for Demo
Find more, sell more. Intelligent search, smart filters and analytics built for growing stores SearchGro replaces Shopify's default search with one built for real customer behaviour like typos, partial words, voice input and more. Build filters using tags, variants, metafields and custom attributes on search results and collection pages. Analytics show what customers search, what returns zero results, and where they drop off so you can act on it. Theme-ready with customisation available. Supports Shopify Markets, multi-currency and localisation. White-glove setup available. SearchGro replaces Shopify's default search with one built for real customer behaviour like typos, partial words, voice input and more. Build filters using tags, variants, metafields and custom attributes on search results and collection pages. Analytics show what customers search, what returns zero results, and where they drop off so you can act on it. Theme-ready with customisation available. Supports Shopify Markets, multi-currency and localisation. White-glove setup available. more Typo-tolerant, voice-enabled search with instant results, ranking & autocomplete Filters on search & collection page via tags, price, variants, metafields & more Search across products, collections, blogs & pages from a single search widget Recently Viewed widget, synonyms, sticky search, highlight terms & auto rules White-glove setup, theme-wise config, multi-currency, localisation & custom CSS
Plant the Seed for Smarter Sales with AI Powered Product Recommendations The First Collaborative Filtering + LLM Recommendation Engine on Shopify Turn your store into a smart selling machine. Seedid.ai combines AI-powered recommendations with real-time shopping behavior to help you cross-sell and upsell like a pro — automatically. No setup headaches. No sales guesswork. Just intelligent, automated revenue growth rooted in data. The First Collaborative Filtering + LLM Recommendation Engine on Shopify Turn your store into a smart selling machine. Seedid.ai combines AI-powered recommendations with real-time shopping behavior to help you cross-sell and upsell like a pro — automatically. No setup headaches. No sales guesswork. Just intelligent, automated revenue growth rooted in data. more Grow Sales Automatically : AI upsells across PDP, cart, and checkout. Smarter AI Recommendation : Powered by LLMs + collaborative filtering. Built for Shopify Growth : Works with any theme, sharpens as you scale. 24/7 Human Support : Questions? We’re always here to help Free White Glove Setup: We’ll install and style it for you—no cost.
Drive more revenue with cross-sells, upsells, product add-on & cart recommendations for your store. Looking to maximize revenue? With SellUp, you can create bold, precision based cross-sells, upsells, product accessories & add-ons for your store. From product page through to the cart and on to the thank you page, you can offer the best upsell & product add-on flow throughout the customer journey. SellUp will match your stores design so upsells look seamless. Incentivize customers with powerful call-to-actions & leverage AI to turn single product orders into multi-product orders increasing AOV Looking to maximize revenue? With SellUp, you can create bold, precision based cross-sells, upsells, product accessories & add-ons for your store. From product page through to the cart and on to the thank you page, you can offer the best upsell & product add-on flow throughout the customer journey. SellUp will match your stores design so upsells look seamless. Incentivize customers with powerful call-to-actions & leverage AI to turn single product orders into multi-product orders increasing AOV more Create AI cross-sells, upsells and add-ons to increase revenue across your store Offer add ons and cart upsells throughout the customer journey Create One Check Upsells in 60 seconds. Sell more with SellUp Create a frequently bought together section to increase average order value Track the performance of your addon offers using the analytics suite
The solution to increase sales in many ways - Running multi flexible discount promotions 1) Increase conversion rate: Display offers to attract customers: BOGO, Buy X get Y, free gift, free ship, Mix & Match, any 3 for $99, flash sales, fixed price, gift card... 2) Boost average order value: Suggest customers to buy more: bundle with quantity box & various offers, build your own bundle, upsell, variant level offer, spend $X get Y motivator/progress bar, quantity breaks, AI or manual recommendation sections... 3) Improve retention rate: Member tiers, custom pricing, loyalty program 1) Increase conversion rate: Display offers to attract customers: BOGO, Buy X get Y, free gift, free ship, Mix & Match, any 3 for $99, flash sales, fixed price, gift card... 2) Boost average order value: Suggest customers to buy more: bundle with quantity box & various offers, build your own bundle, upsell, variant level offer, spend $X get Y motivator/progress bar, quantity breaks, AI or manual recommendation sections... 3) Improve retention rate: Member tiers, custom pricing, loyalty program more Sale widget, quantity discount table, product labels, cart widget, post-sale box Up-sell popup, manual/AI recommendation sections, bundles, top bar, quick-shop Gamified motivator: motivate customers to reach cart goal or quantity goal Countdown, schedule, customer eligibility, country filter, statistics, loyalty.. Customization: translations, colors, locations, style, features, integrations...
Create impactful announcement bars for your site. Enhance visitor engagement with ease. Sense Announcement Bar revolutionizes site interaction by enabling the creation of customizable and dynamic announcement bars. Easily manage multiple bars from a single dashboard and utilize extensive targeting options to reach diverse audience segments effectively. Enhance engagement with visually appealing, timely messages tailored to specific visitor behaviors. Sense Announcement Bar revolutionizes site interaction by enabling the creation of customizable and dynamic announcement bars. Easily manage multiple bars from a single dashboard and utilize extensive targeting options to reach diverse audience segments effectively. Enhance engagement with visually appealing, timely messages tailored to specific visitor behaviors. more Customize with colors, gradients, patterns, or templates for a unique style. Target by device, UTM, cart value, URL, customer, product, collection, and more. Add multiple text blocks with animated transitions for dynamic messaging. Additional bars feature like countdown, button, and scheduled display times. Schedule your Announcement Bar for specific dates and times to reach visitors.
Making ecommerce search personal Sensefuel assists your customers with AI hyper-personalized answers and engaging shopping experiences that promote sales. The platform enables personally relevant and engaging shopper experiences that transform on-site searches into sales. Intuitive and with a user-friendly interface, ecommerce teams can easily control and optimize the implementation of their e-merchandising strategies. The platform seamlessly complements Shopify thanks to this dedicated app. Sensefuel assists your customers with AI hyper-personalized answers and engaging shopping experiences that promote sales. The platform enables personally relevant and engaging shopper experiences that transform on-site searches into sales. Intuitive and with a user-friendly interface, ecommerce teams can easily control and optimize the implementation of their e-merchandising strategies. The platform seamlessly complements Shopify thanks to this dedicated app. more Hyper-personalized search results, in real time, for each visitors Relevance with 0 minutes of settings, thanks to AI self-learning AI Powered product recommendations throughout the entire shopping experience Pin & merchandise product ranking on your category pages Customizable search UX, included enriched filters & conversational experiences
Optimize your product variant SEO with our combined listings app and improve your traffic. Just like Shopify Combined Listings but available to all Shopify plans - Link native Shopify products together as variants. Bypass the 100 variant limit. Each variant is a product so you can improve Search Engine Optimization (SEO) on a per product basis with unique URLs, tags, descriptions, and images per variant. Automatically convert from Shopify Variants to SEO Variants. Just like Shopify Combined Listings but available to all Shopify plans - Link native Shopify products together as variants. Bypass the 100 variant limit. Each variant is a product so you can improve Search Engine Optimization (SEO) on a per product basis with unique URLs, tags, descriptions, and images per variant. Automatically convert from Shopify Variants to SEO Variants. more Extensive Picker: Buttons, Dropdown, Color Swatches, and Image Swatches. 1-click Convert from Shopify Variants to SEO Variants and save hours. Support for multi-level variants like combining color and size. Add your swatches to your collection page and allow users to quickly get to it. Optimize SEO for product pages acting as variants and drive traffic.
Increase conversion rate and checkout faster with Sticky Add to Cart. With SEOWILL (formerly SEOAnt)-Sticky Cart, you can easily choose a mini shopping cart or a floating sticky shopping cart according to your needs, reducing the user selection process and increasing the probability of product checkout. Alternatively display sticky add to cart banner on your homepage, and you can select the real-time urgency countdown timer to increase urgency and increase conversions. Powered by CWILL. With SEOWILL (formerly SEOAnt)-Sticky Cart, you can easily choose a mini shopping cart or a floating sticky shopping cart according to your needs, reducing the user selection process and increasing the probability of product checkout. Alternatively display sticky add to cart banner on your homepage, and you can select the real-time urgency countdown timer to increase urgency and increase conversions. Powered by CWILL. more One click to add sticky carts and mini carts to reduce abandoned carts Add a Quick Buy Button for better user experience Use a countdown timer to increase urgency and increase conversions Put the Add to Cart Button on the page and entice users to click on it Fully customize Sticky Cart to match your store
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About Custom CSS Apps for Shopify
Custom CSS apps are essential tools for Shopify merchants looking to enhance their store's functionality and improve customer experience. These specialized applications help store owners streamline operations, increase sales, and provide better service to their customers.
When choosing a custom css app for your Shopify store, consider factors such as features, pricing, customer support, and compatibility with your theme and other apps. Reading reviews from other merchants can also provide valuable insights into the app's performance and reliability.
The apps listed on this page represent some of the best custom css solutions available in the Shopify App Store. Each has been selected based on its functionality, user ratings, and overall value for Shopify merchants.