★★★★★
The app stopped syncing after the last update and support took a week to reply. We lost orders during the outage and had to switch to a competitor.
AddUp Checkout Customizer
by Bristm LLP
Checkout Customizer with shipping rules, payment rules, automated discounts & address validation.
- Rating
- 5.0
- Reviews
- 2
- Pricing from
- $9.00/mo
- Launched
- May 2023
First seen 18 Sep 2026 · Data updated 1 week ago
Worst recent reviews
1- and 2-star reviews reveal what this app gets wrong: the gaps a competitor could fill.
About AddUp Checkout Customizer
Take control of your Shopify checkout with AddUp. Create checkout rules, customize checkout blocks, manage payment and shipping methods, validate addresses, and apply discounts based on customer, cart, or product conditions. Add checkout upsells & custom fields to improve conversions. Easily customize Shopify checkout and hide or reorder payment methods. Built for flexible checkout customization, including B2B and Shopify Plus stores. Optimize every checkout step for a smoother customer journey.
Highlights
- Add checkout upsells, checkbox offers, and progress offers to boost AOV
- Collect delivery notes, gift messages, and details with checkout rules
- Let customers edit quantities or remove items with easy checkout customization
- Use checkout extensibility to A/B test blocks, offers, and conversion elements
- Customize Checkout with custom content, alerts, policies, and address validation
Languages
English