Validate checkout, add payment, shipping & discount rules, checkout blocks & post-purchase upsells SMART Checkout Rules helps merchants control the checkout experience using flexible conditions. Validate checkout or hide, block, sort, or rename payment methods and shipping options based on rules like country, customer tag, cart value, product, or discount. Grow AOV with one-click post-purchase upsells and downsells, plus checkout blocks like banners, and discount codes. Ideal for high-risk checkouts, B2B, or international flows without code. Boost conversions with smarter upsells and rules. SMART Checkout Rules helps merchants control the checkout experience using flexible conditions. Validate checkout or hide, block, sort, or rename payment methods and shipping options based on rules like country, customer tag, cart value, product, or discount. Grow AOV with one-click post-purchase upsells and downsells, plus checkout blocks like banners, and discount codes. Ideal for high-risk checkouts, B2B, or international flows without code. Boost conversions with smarter upsells and rules. more Add one-click post-purchase upsells & downsells to boost AOV after checkout Block high-risk orders or COD, PayPal & Credit Card by tag, country, value Hide, block, sort or rename payment & shipping methods by your own rules Show checkout blocks: banners & discount codes, reduce abandoned checkouts Apply checkout validation & discount logic by cart total, tag or delivery method
Custom HTML Shopify Apps
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Size charts, size guides and a “Find my size” AI size recommender, built in minutes Build size charts, size guides and fit quizzes in minutes with SmartSize AI and a modular editor. Import and export all your size charts in bulk. Upload an image or start from templates for men, women, lingerie, kids and pets. Add tabs, AI translations, unit conversion and international sizing. Turn on “Find my size”, an AI fit finder and size recommender. Shoppers answer once and are remembered on every product and visit. Buttons place themselves on any theme, or our team sets it up. Build size charts, size guides and fit quizzes in minutes with SmartSize AI and a modular editor. Import and export all your size charts in bulk. Upload an image or start from templates for men, women, lingerie, kids and pets. Add tabs, AI translations, unit conversion and international sizing. Turn on “Find my size”, an AI fit finder and size recommender. Shoppers answer once and are remembered on every product and visit. Buttons place themselves on any theme, or our team sets it up. more Size chart templates for men, women, kids, lingerie and pets. Bulk import/export AI builds a size guide from a photo or screenshot of your existing chart “Find my size” AI fit finder: shoppers answer once, get their size everywhere Size charts and size quiz in 25+ languages. AI translation, unit conversion Drag-and-drop size guide blocks. The button places itself, or we set it up
Boost your sales and AoV with personalized & smart product recommendations, bundles, and promotions. Improve sales with smart recommendations, product bundles, and promotions with Lucid. It's easy to use, fast, and customizable, allowing you to bring Amazon-like features to your store and upsell like a pro. Customize the designs to match your store aesthetics and easily add discounts to your product bundles and promoted products for flash sales. Plus, with support for localization, you can upsell across the world. Don't miss out on boosting your sales and offering a personalized experience. Improve sales with smart recommendations, product bundles, and promotions with Lucid. It's easy to use, fast, and customizable, allowing you to bring Amazon-like features to your store and upsell like a pro. Customize the designs to match your store aesthetics and easily add discounts to your product bundles and promoted products for flash sales. Plus, with support for localization, you can upsell across the world. Don't miss out on boosting your sales and offering a personalized experience. more Effortless Setup: Associate, Choose Type, Customize Design to Match Store Design Experience the Power of Variant Options-Controlled Recommendations and Bundles Product Recommendations: Related Products, Shop the Look & Trending Products Product Bundles: Frequently Bought Together, Complementary Products & Discounts Product Promotion: Product Advertising, Flash Sales, Deals & Discounts
Expand any theme with sections, templates, and packages — no code or design skills needed. Most themes limit how much you can customize each page. Smind adds a growing library of sections, templates, and packages that work inside your existing theme editor — no new tools to learn. Start by adding individual sections to any page across your store. When you need to build faster, use full-page templates or apply a Package — a ready-made set of templates that sets up your entire store structure in a few clicks, the same way installing a theme would. Most themes limit how much you can customize each page. Smind adds a growing library of sections, templates, and packages that work inside your existing theme editor — no new tools to learn. Start by adding individual sections to any page across your store. When you need to build faster, use full-page templates or apply a Package — a ready-made set of templates that sets up your entire store structure in a few clicks, the same way installing a theme would. more A large library of sections for every page type, editable in your theme editor Full-page templates to build each store page without starting from scratch Packages: install a complete store layout in a few clicks, like a theme Product blocks: add upsell, bundle, and conversion info to product pages New sections and layouts added weekly — no extra tools or coding needed
Leverage cart upsell offers to encourage customers to buy more: discount products, BOGO & free gift. Create cart upsell offers like Buy One Get One, free gifts, and custom discounts! Show customers an upsell popup after they click "Add to Cart," encouraging quicker purchases. Use Shopify AI for automatic upsell recommendations or set them up manually. Easily choose products for upsells and set conditions for applying offers. Boost sales with targeted, attention-grabbing upsell offers! Create cart upsell offers like Buy One Get One, free gifts, and custom discounts! Show customers an upsell popup after they click "Add to Cart," encouraging quicker purchases. Use Shopify AI for automatic upsell recommendations or set them up manually. Easily choose products for upsells and set conditions for applying offers. Boost sales with targeted, attention-grabbing upsell offers! more All kinds of upsell ideas to implement, from BOGO to free gifts. Advanced real-time analytics. Track your upsell campaigns to optimize offers. Fully customizable design. Adjust the popup to match your store theme. Smart upsell suggestions based on Shopify AI algorithms. Easy to set up. Create offers in minutes and start selling more right away.
When the customer scrolls the page, Sticky ATC makes potential users pay attention to your products. Increase your revenue by having a smart sticky product bar, which will make potential customers pay attention to your products. Our Sticky Add To Cart app will know when the customer tends to scroll up & is looking to add product to the cart. It appears at just the right time, in the right place. This is for the ultimate convenience while still keeping customers focused on the main contents, like description, features…etc. you can modify everything you want to match your online store perfects. Increase your revenue by having a smart sticky product bar, which will make potential customers pay attention to your products. Our Sticky Add To Cart app will know when the customer tends to scroll up & is looking to add product to the cart. It appears at just the right time, in the right place. This is for the ultimate convenience while still keeping customers focused on the main contents, like description, features…etc. you can modify everything you want to match your online store perfects. more Modify everything you want to match your online store perfectly. Auto encloses to any themes, including the most popular themes on the market. Sticky Add to Cart button behavior can same as the default product add to cart Homepage and Support multi stores, currencies, and languages (Automatically) Fast CDN based performance + Integrate with google analytics
More Conversions w/ Sticky Add to Cart, Quick Buy Now Button, Cart Slider, Sticky Cart & Cart Upsell Maximize cart conversions on your Shopify store with STKY Sticky Add To Cart. Ensure Add to Cart is always visible, reducing cart abandonment. Countdown Timer urgency feature converts even more! Quick Buy Button enables swift orders directly on product pages. The Sticky Checkout Bar gives a cart overview, helping checkout. With our Ajax Slider Cart Drawer, even upsell & cross-sell additional products & increase AOV. Sticky Cart, Quick Buy, Buy Now Button & Add To Cart Bar maximize Shopify sales! Maximize cart conversions on your Shopify store with STKY Sticky Add To Cart. Ensure Add to Cart is always visible, reducing cart abandonment. Countdown Timer urgency feature converts even more! Quick Buy Button enables swift orders directly on product pages. The Sticky Checkout Bar gives a cart overview, helping checkout. With our Ajax Slider Cart Drawer, even upsell & cross-sell additional products & increase AOV. Sticky Cart, Quick Buy, Buy Now Button & Add To Cart Bar maximize Shopify sales! more Sticky Add To Cart Bar & Sticky Cart - now with Countdown Timer for urgency Sticky Cart Icons & Add To Cart Bar - always in view for quick checkout Quick Buy Button & Buy Now Button - help shoppers complete purchase quickly Slider Cart Drawer w/Upsells - upsell & cross sell products to increase revenue Quick View, Quick Buy & Buy Now - view, add to cart, or buy with just 1 click
Earn more from every order with the power of gift wrap & gift message. Boost your AOV in 1 click. Shoppers love gifting: Turn that love into revenue. Super allows you to offer your customers multiple gift wraps, gift notes, greeting cards, gift with purchase, and a gift box right before checkout. With customizable design that fits every theme, cart, drawer cart & product page, Super drives more conversions, boosts sales, and upsell your store's AOV with the power of gifting, especially during holiday seasons & birthday events like Halloween, Black Friday Cyber Monday (BFCM) and Christmas. Shoppers love gifting: Turn that love into revenue. Super allows you to offer your customers multiple gift wraps, gift notes, greeting cards, gift with purchase, and a gift box right before checkout. With customizable design that fits every theme, cart, drawer cart & product page, Super drives more conversions, boosts sales, and upsell your store's AOV with the power of gifting, especially during holiday seasons & birthday events like Halloween, Black Friday Cyber Monday (BFCM) and Christmas. more Add unlimited paid/free gift wrapping, paid/free gift message & gift receipt Show the gift options in Shopify Plus Checkout page for supreme conversion rate Automatic gift with purchase order tags for easy fulfillment & insights. Show the gift options for specific products only or for all of your products Support orders from Roposo Clout, GlowRoad, GiftShip, Baapstore, Raffle and more
High-speed slide cart drawer to lift AOV, offer in-house shipping protection & keep 100% margin. Transform your Shopify cart into a high-converting revenue drawer with zero theme lag. Supercart empowers merchants to boost average order value through 1-click in-cart upsells, product bundles, and multi-tier free shipping progress meters. Keep 100% of package protection revenue by replacing lost shipments at wholesale cost rather than paying broker fees. Enjoy transparent flat pricing with 0% GMV commission, sub-10ms reactive performance, and full Online Store 2.0 theme compatibility. Transform your Shopify cart into a high-converting revenue drawer with zero theme lag. Supercart empowers merchants to boost average order value through 1-click in-cart upsells, product bundles, and multi-tier free shipping progress meters. Keep 100% of package protection revenue by replacing lost shipments at wholesale cost rather than paying broker fees. Enjoy transparent flat pricing with 0% GMV commission, sub-10ms reactive performance, and full Online Store 2.0 theme compatibility. more In-house shipping protection: retain 100% of fee margin with zero broker cut. Dynamic free shipping bar, free gift unlock rewards, and rush packing. One-click in-cart upsells, product bundles, cross-sells, and cart rules. Sub-10ms reactive slide cart drawer engineered for Online Store 2.0 themes. Transparent flat-rate pricing with strict 0% GMV commission on your sales.
Swatcheroo - Automatically replaces product dropdown options with nice color & image swatches. The Swatcheroo is an app that uses product variants options and automatically replaces them with swatches. You do not need to create new variant options for the app, just edit the style for existing options on your store. You can easily customize all existing options in your store (like Sizes, Materials, Colors) with one click. No programming/coding required: The app installs itself instantly and requires no coding. It works with Shopify themes without any modification from your side. The Swatcheroo is an app that uses product variants options and automatically replaces them with swatches. You do not need to create new variant options for the app, just edit the style for existing options on your store. You can easily customize all existing options in your store (like Sizes, Materials, Colors) with one click. No programming/coding required: The app installs itself instantly and requires no coding. It works with Shopify themes without any modification from your side. more Supporting all product option types (like Sizes, Materials, Colors). Customizable Style. Set on any page of your store. Easy to use app and requires no coding! Instant install and leaves no code resid
Add Beautiful Color & Image Swatches to your Product and Collection Pages Swatches Dotify replaces variant dropdowns with visual swatches to help customers select product options more easily. It works on product and collection pages and adapts to different themes and layouts. You can customize the appearance of swatches to match their store design and clearly indicate unavailable variants, improving clarity when browsing products and reducing confusion when choosing options. Swatches Dotify replaces variant dropdowns with visual swatches to help customers select product options more easily. It works on product and collection pages and adapts to different themes and layouts. You can customize the appearance of swatches to match their store design and clearly indicate unavailable variants, improving clarity when browsing products and reducing confusion when choosing options. more Use Color & Image Swatches with your Shopify product options. Choose between a variety of swatch themes. Add swatches on your Collection Pages. Auto-detect color options in your shop for quick setup. Detects soldout variants and updates the swatches to reflect the availability
Replace variant dropdowns with image & color swatches on product and collection pages Variant dropdowns make it hard for customers to visualize product options. Swatchify replaces them with clean, interactive image and color swatches for faster, clearer selection. Show swatches on product and collection pages to improve the shopping experience and help customers choose with confidence. Variant dropdowns make it hard for customers to visualize product options. Swatchify replaces them with clean, interactive image and color swatches for faster, clearer selection. Show swatches on product and collection pages to improve the shopping experience and help customers choose with confidence. more Custom swatch layouts with clean design and smooth animations Link products with swatches to improve discovery and navigation Sticky add to cart with real-time inventory and price display Multi-language support with automatic detection across 40+ languages Show swatches on product and collection pages
All-in-one product personalizer with live preview. Design, customize, fulfill orders with automation Teeinblue is the product personalizer that automates your customization workflow. With live preview, customers personalize any printing product: apparel, wall art, drinkware, jewelry & more. Every design is fully customizable, from custom field, custom text, custom clipart, photo uploads to AI effects & syncs automatically across your catalog. Easily send custom orders to Print On Demand services: Printify, Printful, merchOne, ShineOn, Gelato, etc. A product customizer built to grow your store. Teeinblue is the product personalizer that automates your customization workflow. With live preview, customers personalize any printing product: apparel, wall art, drinkware, jewelry & more. Every design is fully customizable, from custom field, custom text, custom clipart, photo uploads to AI effects & syncs automatically across your catalog. Easily send custom orders to Print On Demand services: Printify, Printful, merchOne, ShineOn, Gelato, etc. A product customizer built to grow your store. more Customize with live preview: custom text, photo, clipart, map, moon phase & more AI photo effects: Gen AI effects, remove background, face cutout, sketch Sell custom products smarter: bulk upload, Canva & PSD import, MCP connector Auto generate production files. Easily send personalized orders to POD services Multiple personalized stores in one account. Sell customized products faster
The app helps you add a terms-and-conditions checkbox to your store - 2.0 compatible TermsBee allows you to add a Terms and Conditions Checkbox to your store easily. After enabling the app a checkbox will immediately start appearing in your store's cart page & drawer (Ajax) and products page, customers will be required to tick it in order to checkout. The date and time when the checkbox was ticked will be logged in the order's additional details section and can help you against chargebacks. You can also show the checkbox in the account register & login pages. TermsBee allows you to add a Terms and Conditions Checkbox to your store easily. After enabling the app a checkbox will immediately start appearing in your store's cart page & drawer (Ajax) and products page, customers will be required to tick it in order to checkout. The date and time when the checkbox was ticked will be logged in the order's additional details section and can help you against chargebacks. You can also show the checkbox in the account register & login pages. more Easily add an 'I Agree' Checkbox to your store's cart page and Ajax cart See when the customer agreed to your terms and conditions in the order details. You can show the checkbox appear for specific products only. You can show the "I Agree To Terms Checkbox" for all or specific countries. The app supports additional checkout buttons Ex. PayPal, GPay, Apple Pay, etc.
Make shoppers agree to terms before checkout, with proof of consent saved on every order. Termsy adds a consent checkbox to your cart. Shoppers must tick it to check out. Write your own statement and link your terms of service, refund policy, shipping or privacy policy, so one policy checkbox covers all your checkout terms. A Shopify checkout rule checks acceptance, not just theme code, so express buttons and direct checkout links can't skip it. Every order stores the accepted text, version and time as proof if a customer disputes a charge. Default text in 14 languages. Termsy adds a consent checkbox to your cart. Shoppers must tick it to check out. Write your own statement and link your terms of service, refund policy, shipping or privacy policy, so one policy checkbox covers all your checkout terms. A Shopify checkout rule checks acceptance, not just theme code, so express buttons and direct checkout links can't skip it. Every order stores the accepted text, version and time as proof if a customer disputes a charge. Default text in 14 languages. more Add a required terms and conditions checkbox to your cart in one click Blocks Shop Pay, Apple Pay & Buy it now until terms are accepted Logs agreed terms, timestamp & version on every order as proof Server-side checkout rule: no theme hack, no bypass via direct links I agree checkbox for refund, shipping & privacy policies
T&C checkbox on the cart page & checkout page, Support Age Verification & Country Blocker. One click setup without any hassle! Instantly display a Terms & Conditions checkbox above the checkout button to ensure customers accept your policies before purchase. The policies that your customer needs to accept may include the European Union’s data privacy law, the General Data Protection Regulation (GDPR). Add Age Verification to restrict underage access and prevent unauthorized usage. Use Country Blocker to control or restrict orders from selected regions. One click setup without any hassle! Instantly display a Terms & Conditions checkbox above the checkout button to ensure customers accept your policies before purchase. The policies that your customer needs to accept may include the European Union’s data privacy law, the General Data Protection Regulation (GDPR). Add Age Verification to restrict underage access and prevent unauthorized usage. Use Country Blocker to control or restrict orders from selected regions. more Get the date and time the customer agreed to your T&C on additional notes. Enable age verification & Block specific country to access your store Inbuilt language translations support & set the T&C checkbox checked by default. Show the Terms Checkbox for all or specific countries & on specific products The app supports additional checkout buttons, Login, Register & Contact pages.
Increase AOV and Social Traffic with Thankify's No-Code, Custom Thank You page builder. Turn your thank you page into a growth engine with Thankify. Boost revenue through personalized upsells, gather valuable customer insights with post-purchase surveys, and drive social traffic with share buttons. With no-code tools, create engaging pages that transform one-time buyers into repeat customers — all while enhancing their experience. Turn your thank you page into a growth engine with Thankify. Boost revenue through personalized upsells, gather valuable customer insights with post-purchase surveys, and drive social traffic with share buttons. With no-code tools, create engaging pages that transform one-time buyers into repeat customers — all while enhancing their experience. more Increase sales with tailored upsells on your thank you page. Gather feedback to improve customer experience post-purchase. Use videos and images to create engaging thank you pages. Add share buttons to boost your social traffic and followers. Build thank you pages easily with a no-code drag-and-drop editor.
Tip Quik gives your customers the option to add a tip to their order before they reach checkout. On the cart page and slide-out cart, a pop-up will appear when the checkout or Shop Pay button is clicked. The pop-up will ask the customer if they wish to leave a tip before it brings them to the checkout page. This is a great way to collect tips for your employees and help give everyone a boost. Help out your delivery driver, packaging department, or front of house. Tested and working on all official free Shopify themes. On the cart page and slide-out cart, a pop-up will appear when the checkout or Shop Pay button is clicked. The pop-up will ask the customer if they wish to leave a tip before it brings them to the checkout page. This is a great way to collect tips for your employees and help give everyone a boost. Help out your delivery driver, packaging department, or front of house. Tested and working on all official free Shopify themes. more Before checkout, the customer will be shown a tip pop-up. Tip percentages can be customized or be a flat dollar amount. All content on the tip pop-up and the design of it can be customized.
The AI sales engine for e-commerce Activate tools that boost your online store's sales automatically. Personalize your customers' shopping experience with a single initial setup, and within days you'll start seeing measurable results. Our team supports you with human assistance and personalized reports at every stage. TITANPush activates, converts, and retains customers. All from one place. Activate tools that boost your online store's sales automatically. Personalize your customers' shopping experience with a single initial setup, and within days you'll start seeing measurable results. Our team supports you with human assistance and personalized reports at every stage. TITANPush activates, converts, and retains customers. All from one place. more 1. Set up and go: Choose the tools you want to use. 2. Let it work: Everything runs on its own 3. Track performance: Use our dashboard + GA4 reports
Run free gift with purchase offers that auto add gifts to cart, with BOGO & Buy X Get Y upsell Tek Labs is a trusted free gift and upsell app for creating Free gift with purchase, BOGO, Buy X Get Y, Volume discounts, Product bundles, and Cart upsell offers. Beautiful, fully customizable widgets display across every position on your store - product page, cart, popup, and checkout. Motivating customers to buy more and boosting AOV, proven by strong upsell revenue generated through the app. Our support team is always ready to help via live chat whenever you need. Tek Labs is a trusted free gift and upsell app for creating Free gift with purchase, BOGO, Buy X Get Y, Volume discounts, Product bundles, and Cart upsell offers. Beautiful, fully customizable widgets display across every position on your store - product page, cart, popup, and checkout. Motivating customers to buy more and boosting AOV, proven by strong upsell revenue generated through the app. Our support team is always ready to help via live chat whenever you need. more Support Free gift with purchase, Buy X Get Y, and Buy One Get One (BOGO) offers Upsell with Volume discounts, You May Also Like, and fixed Product bundles Cart upsell progress bar with multi-tier gift rewards to motivate shoppers Automatically add gift to cart, or let customers choose their own gift Widgets across your whole store announce offers, each spot has a dedicated UI
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About Custom HTML Apps for Shopify
Custom HTML 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 html 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 html solutions available in the Shopify App Store. Each has been selected based on its functionality, user ratings, and overall value for Shopify merchants.