We build focused, fast apps for Shopify merchants — starting with Kai, the progress bar that rewards shoppers with free shipping, free gifts and tiered discounts for adding one more item.
5.0 from 43 reviews on the Shopify App StoreEvery app we ship does one job well, installs in minutes and comes with support from the people who wrote it.
Kai adds a reward progress bar to your Shopify store. Shoppers see how close they are to free shipping, a free gift or a bigger discount, and add one more item to get there. Rewards are applied automatically at checkout with Shopify Functions — no codes.
Replace your theme’s cart with a drawer built for bigger orders: your progress bar, upsells, add-ons, a cart timer, trust badges and express checkout — in six ready-made templates.
See every drawer feature →Scalix Ecom is an independent Shopify app developer. Kai launched on the Shopify App Store in November 2024 and has a perfect 5.0 rating from merchants across 18 countries.
You talk to the people who build the app. Merchants mention it in review after review — like Skalli Essentials: “Any issues I have are resolved in less than 30 minutes.”
Rewards run as Shopify automatic discounts on Shopify Functions, the storefront installs as a theme app extension, and billing goes through your Shopify invoice. No theme code to edit.
Value or quantity goals, include or exclude products and collections, markets and currencies, schedules, customer targeting. Built for the offers merchants actually run.
From $5.99 a month with unlimited campaigns on every plan — no order caps or revenue share. Reviewers call it “way cheaper and more customizable” than the big names.
“Best progress bar app out there! We tested several apps before landing on Kai Progress Bar & Free Gift, and this is by far the best one — it can handle any scenario or condition we throw at it, super flexible. On top of that, the pricing is very reasonable and cheap for what you get.”
“By far the best progress bar app we've used. It's easy to set up, works beautifully, and the customer service is outstanding. Couldn't recommend it more!”
“I tested several progress bar apps, but each one had limitations that didn't work with the discounts I wanted to offer. Kai's progress bar is clean, customizable, and gives me the option to include or exclude specific collections—exactly what I needed.”
“Very responsive and efficient support. App works well, easy to set up and a lot of customization is possible through the interface which is usually not the cas with other apps. Definitely recommend!”
“Have installed it on my website woodchop.in since 2 weeks now and have already started seeing average customer spends go up.”
“Any issues I have are resolved in less than 30 minutes. Scalix is great”
Verbatim reviews from the Shopify App Store listing — 5.0★ from 43 reviews.
Write to us and the team that builds the apps will get back to you. Tell us your store URL and what you want to achieve — a free shipping goal, a gift with purchase, a new cart drawer — and we’ll help you set it up.
Already using Kai? Live chat is in the app dashboard.
Set up your first Kai campaign in minutes. 4-day free trial, unlimited campaigns.
