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Checkout Extensions

Every Cartylabs guide tagged "Checkout Extensions". Tactical playbooks for Shopify operators on this topic.

Free Shopify Checkout Upsell App: 10+ Extensions to Increase AOV in 2026

Cartylabs is a free Shopify checkout upsell app with 10+ extensions — smart upsells, free shipping bar, shipping protection, free gift, trust badges. Works on Shopify Plus and all plans.

May 6, 2026 7 min read

Start lifting your AOV today.

Install Cartylabs free on Shopify. Setup takes 2 minutes with no developer required.

Install Cart App free Install Checkout App