About

We build the parts of Shopify that decide how much an order is worth

Ninety 9 LTD is a small product team in Varna, Bulgaria. Since 2018 we have shipped five apps to the Shopify App Store, all pointed at the same problem: a store that has already earned the click should earn more from it. 20,000+ stores run one of them today, and together they have generated more than $33M in additional revenue for those merchants.

20,000+Shopify stores run a Ninety9 app
$33M+Extra revenue generated for merchants
5Apps on the Shopify App Store
151Merchant reviews
2Built for Shopify badges
98Published guides

Why average order value

There are only three ways to grow ecommerce revenue: more visitors, a higher conversion rate, or a larger average order. The first costs money that gets more expensive every quarter. The second is slow, statistically noisy and mostly capped by your product and your price. The third is the one most stores never seriously work on — and it is the only one where a change made once keeps paying on every order that follows, through every channel, forever.

A store doing 1,000 orders a month at a $58 average order value turns $58,000. Add $9 to that average — one accessory, one quantity break, one nudge past a free shipping threshold — and it turns $67,000 from the exact same traffic. Nothing about acquisition changed. That is the whole thesis behind everything we build.

The free CRO audit

Before you install another app, paste your store or a product URL into the CRO Audit for Shopify stores. It looks at the product page the way a shopper would, ranks the constraints that can stop the sale, then names the app that owns each miss. A homepage or bare domain is enough — we pick a bestseller so you do not have to hunt for a product link. Password-protected stores work too.

A separate check, ChatGPT SEO check for Shopify stores, looks at whether a live store page is set up for ChatGPT to read: JSON-LD, robots.txt, and llms.txt. It does not score citations in ChatGPT or Perplexity.

How we build

We would rather ship five focused apps than one bloated suite. A cart drawer that also tries to be an email tool is worse at both. So Addly owns the product page, Addy owns the cart, Goalify owns the goal mechanic, Monet owns the popup moment, and Reviso owns everything after checkout. They share a design language and integrate with each other, but you can install exactly one and get the full benefit of it.

Performance is not negotiable. Every app is a theme app extension: no theme.liquid edits, no render-blocking scripts, and a clean uninstall that leaves nothing behind. Storefront widgets load asynchronously and stay out of the Largest Contentful Paint path.

Where we are

ul. "27-mi yuli", No 23, Center Odesos, 9000 Varna, Bulgaria. Small team, direct support, no ticket queue between you and the person who wrote the code. If something in one of our apps is wrong, you will usually get a developer rather than a script.

Principles

What we optimise for

One number, five angles

We do not build "all-in-one" software. Each app owns one moment in the buying journey and does that job better than a bundled feature ever could.

Speed is a feature

Every app ships as a theme app extension, loads asynchronously and stays off the critical rendering path. Two of five carry the Built for Shopify badge for exactly this reason.

Play well with others

Our apps integrate with each other and with the page builders, review apps and currency converters merchants already run. No lock-in, no theme file edits, clean uninstalls.

Support that answers

Merchants routinely tell us a developer replied within a minute. That is not a growth hack; it is the only way to run software that touches someone else’s revenue.

The suite

Five apps, one thesis

Comparison of the five Ninety9 Shopify apps
AppBest forCategoryRatingPricingBuilt for Shopify
Addy The AI slide cart drawer built for AOV Cart customization New Free to install — Install
Addly Bundles, quantity breaks and AI offers Product bundles 4.8★ (104) Free plan, then from $9.99/mo Yes Install
Goalify Free shipping bars, gifts and cart goals Upsell and cross-sell 5.0★ (42) Free plan, then from $3.99/mo Yes Install
Monet AI upsell popups at the right moment Product bundles 5.0★ (4) Free to install — Install
Reviso Self-serve order edits that raise AOV Order editing 5.0★ (1) Free to install — Install
FAQ

About Ninety9

What is Ninety9?

Ninety 9 LTD is a Shopify Partner based in Varna, Bulgaria, building five Shopify apps that increase average order value: Addy (AI cart drawer), Addly (bundles and quantity breaks), Goalify (free shipping progress bar and cart goals), Monet (upsell popups) and Reviso (post-purchase order editing). 20,000+ stores run at least one of them.

Is Ninety9 an official Shopify company?

No. Ninety9 is an independent Shopify Partner. Our apps are published on the Shopify App Store and billed through Shopify, but Shopify does not operate or endorse Ninety9. Shopify is a trademark of Shopify Inc.

Which Ninety9 apps are Built for Shopify?

Addly and Goalify carry the Built for Shopify badge, which requires meeting Shopify's standards for performance, admin design and reliability. Every Ninety9 app is a theme app extension that makes no edits to your theme files.

How do I get support for a Ninety9 app?

Use the live chat inside the app or email [email protected]. Messages go to the developers who build the apps rather than a ticket queue, and most replies arrive within minutes during working hours.

Are the free CRO Audit and ChatGPT SEO check really free?

Yes. Both tools read public storefront pages, need no login or card, and are free to use and share. They exist so merchants can see what stops a sale or what blocks AI from reading a page before installing anything.

Work with us

Pre-sales questions, migration help, or a feature you wish existed — we read every message and usually reply the same day.

Every app installs from the Shopify App Store. No theme code, no developer needed.