Our 5 best apps for Shopify to drive sales and revenue

Running a successful Shopify store in 2025 requires more than just great products and a good design. The right apps can significantly enhance your store's functionality, improve customer experience, and boost sales and revenue.

StackUp Digital's Top 5 Shopify Apps

Based on recent data and expert analysis, here are the top five most popular Shopify apps that we are seeing merchants leverage to get their store off the ground and start making significant sales and revenue.

These apps come as a standard recommendation for functionality when we build stores for clients. All apps come with free trials or free versions if you want to test drive them.

Klaviyo Integrations with Shopify - Klaviyo Flows Dashboard

01. Klaviyo

Using Klaviyo with Shopify offers powerful benefits for eCommerce businesses looking to boost customer engagement and drive sales through data-driven marketing. Klaviyo integrates seamlessly with Shopify, automatically syncing customer data, purchase history, and on-site behaviour in real-time. This allows you to create highly personalised email and SMS campaigns, automate abandoned cart flows, and segment your audience based on precise shopping activity. With its advanced analytics and easy-to-use tools, Klaviyo helps you understand your customers better and deliver the right message at the right time, resulting in higher conversion rates, increased customer loyalty, and measurable revenue growth. And did we see all of this can be fully automated with Klaviyo?

The Reviews.io Platform

02. Reviews.io

When it comes to gaining trust in your products and brand, there is nothing better than the Reviews.io platform. The review.io platform is the best in the world because it helps brands build trust and boost sales through authentic customer feedback. Seamlessly integrated with Shopify, it allows you to collect, manage, and showcase real reviews across your site, Google, and social media and with powerful features like video reviews, UGC collection, and in-email review requests, it not only enhances credibility but also improves SEO and conversion rates.

For eCommerce brands focused on transparency and growth, Reviews.io is an essential tool.

CED Commerce for Shopify - CED Commerce Website

03. CED Commerce

CED Commerce is a standout Shopify app for merchants aiming to streamline multichannel selling and expand their reach across platforms like Google Shopping, Facebook, TikTok, Etsy, and more. The app offers real-time product syncing, automated inventory management, and seamless order handling, reducing manual tasks and enhancing efficiency. With features like custom product profiling, support for Performance Max campaigns, and local inventory ads, it empowers merchants to optimise their listings and advertising strategies.

Swap Shipping and Returns Integration - Swap's website on a Macbook Screen

04. Swap Shipping & Returns

Swap Shipping & Returns is a top-tier Shopify app that transforms the often painful returns process into a strategic advantage for ecommerce brands. By prioritising instant exchanges and store credit over traditional refunds, it helps merchants retain revenue and foster customer loyalty.

The app offers pre-negotiated shipping rates with leading global carriers, reducing logistics costs and simplifying international returns management. It's fully customisable interface ensures a seamless fit with your brand's identity, enhancing the customer experience.

Recharge Subscriptions - Integrate Recharge today with StackUp Digital

05. Recharge Subscriptions

Recharge Subscriptions is a powerful Shopify app that gives eCommerce brands the ability to unlock recurring revenue and deepen customer loyalty through seamless subscription management. Its paid plans offer immense superpowers and flexible subscription rules that adapt to any business model. With features such as dynamic bundling, customer self-service portals, and integrations with top tools like Klaviyo and Gorgias, Recharge allows merchants to create tailored subscription experiences that drive retention and lifetime value.

When we launch Shopify stores for our clients, our main focus is not just on great design and performance, but also on ensuring the tools are in place to drive long-term growth, increase sales, and build meaningful customer relationships.

The five apps we've highlighted, Klaviyo, Reviews.io, CED Commerce, Swap Shipping & Returns, and Recharge Subscriptions, each play a critical role in setting the bar for customer experience and maximising revenue.

Klaviyo empowers brands to create data-driven email and SMS campaigns that convert, while Reviews.io builds trust through authentic user feedback and UGC. CED Commerce enables multichannel selling at scale, opening up new audiences with seamless product and order syncing. Swap Shipping & Returns turns post-purchase operations into a competitive advantage by simplifying exchanges and encouraging store credit. Finally, Recharge Subscriptions creates reliable recurring revenue streams and boosts customer retention through flexible subscription models.

Together, these tools form a powerful foundation that supports both the front-end experience and back-end growth strategy, helping our clients scale faster and deliver more value to their customers.

"StackUp digital are a great agency to work with, they made us an amazing web shop for our brand which drastically increased our sales."

Chris Danks Hosting Heroes

If you’re curious about any of the apps we’ve mentioned or simply want to chat about all things eCommerce and Shopify, we’d love to hear from you.

Whether you need help integrating tools like Klaviyo or Recharge, or you're just looking for honest advice over a coffee, our team is always up for a conversation. Get in touch on a no-pressure, jargon-free, just friendly guidance from people who live and breathe Shopify.