Want to lift conversions and AOV on Shopify without rebuilding your whole store? Below are the best-in-class apps that reliably move the needle. I grouped them by growth lever and included quick setup tips you can implement in under an hour.
If you need help evaluating or implementing any of these, check the StartExus resources, including How it works, the FAQ, and the Marketplace if you are exploring buy or build decisions for your next brand.
Email and SMS - capture, nurture, convert
Klaviyo
- Why it increases sales: advanced segmentation, browse and cart abandonment flows, product recommendations, and predictive analytics that target high intent shoppers.
- Fast setup: import your Shopify data, enable the prebuilt abandoned checkout and welcome series, then add dynamic blocks for bestsellers.
- Who it is for: stores that want email first with optional SMS at scale.
Postscript
- Why it increases sales: conversational SMS campaigns and automations drive fast, incremental revenue and recover abandoned carts quickly.
- Fast setup: add compliant opt in at checkout and run a simple 2 message cart recovery flow.
- Who it is for: brands that want dedicated SMS depth with strong support.
Tip: pair email and SMS so each channel reinforces the other. StartExus can help you sequence flows and audits step by step.
Upsell and cross sell - increase AOV at checkout and post purchase
ReConvert
- Why it increases sales: one click upsells at checkout, post purchase offers, and AI bundles add profitable items without hurting conversion rate.
- Fast setup: enable a thank you page offer targeting your top seller and a small accessory cross sell at checkout.
- Who it is for: any store that hasn’t yet tested post purchase or checkout upsells.
Subscriptions - boost lifetime value
Recharge Subscriptions
- Why it increases sales: turns one time buyers into recurring revenue with a customer portal for skips, swaps, and add ons; robust analytics help reduce churn.
- Fast setup: add subscribe and save to your top 5 SKUs with a 10 percent incentive and set a winback flow for canceled subs.
- Who it is for: consumables, wellness, beauty, pet, coffee, and replenishment heavy catalogs.
Reviews and UGC - convert with social proof
Judge.me
- Why it increases sales: unlimited reviews with photos and videos, rich snippets, and Q&A boost trust on product pages and collection grids.
- Fast setup: auto request emails 14 days post fulfillment and show media first for your hero products.
- Who it is for: stores that want fast, lightweight social proof at a low cost.
Okendo
- Why it increases sales: attributes based reviews, UGC galleries, and bundles with loyalty or referrals give richer context that improves PDP conversion.
- Fast setup: collect attributes like fit, size, or use case and surface them as filters.
- Who it is for: DTC brands that want deeper UGC features and integrations.
Post purchase experience - reduce WISMO and returns friction
AfterShip Tracking
- Why it increases sales: branded tracking pages and proactive notifications reduce support tickets and open upsell space on tracking pages.
- Fast setup: customize your tracking page, connect carriers, and add a recommended products block.
- Who it is for: any store shipping at volume that wants fewer WISMO tickets.
Loop Returns
- Why it increases sales: self serve returns with instant exchanges keep revenue in house and reduce refund leakage; fraud controls protect margin.
- Fast setup: enable even exchanges plus bonus credit for store credit and spotlight size exchanges on PDPs.
- Who it is for: apparel and footwear plus any brand with frequent size or style swaps.
Starter stack - implement this in a weekend
- Enable Klaviyo abandoned checkout, browse abandonment, and welcome flows.
- Add ReConvert thank you page and one click post purchase upsell for your top accessory.
- Turn on Judge.me review requests with photo and video capture.
- Integrate AfterShip for a branded tracking page with a product carousel.
- If applicable, launch Recharge subscribe and save on replenishable SKUs.
- As you scale, consider Postscript SMS and evaluate Okendo for attribute rich UGC.
When you are ready to level up beyond apps, explore strategic options on StartExus or review our process to plan your next growth step.
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