Traffic is expensive, baskets are not
Doubling ad spend doubles cost. Adding $12 to an average order costs nothing per order and compounds across every channel you already run.
Trusted by 20,000+ Shopify stores
Make every Shopify order worth more
Ninety9 builds conversion-rate optimisation apps for Shopify: AI cart drawers, bundles, upsell popups, free shipping progress bars and post-purchase order editing. Trusted by 20,000+ stores.
Free plans on every app
No theme code required
4.9★ average across 151 reviews
Our impact
20,000+
Shopify stores run a Ninety9 app
$33M+
Extra revenue generated for merchants
5Apps covering the whole funnel
4.9★Average rating across 151 reviews
2Built for Shopify badges
<2 minTypical setup time
Why average order value
The cheapest growth lever you are not pulling
Conversion rate and traffic get all the attention. Order value is the only one of the three you can move without spending a cent more on acquisition.
The cart is where money leaks
Most stores treat the cart as a receipt. It is the highest-intent surface you own, and the cheapest place to add margin.
Post-purchase is unowned territory
The window between "order placed" and "parcel shipped" generates support tickets, cancellations and returns — or a second sale.
The suite
One app for every stage of the buying journey
Each app solves one job properly and plugs into the others. Run one, or run all five and cover the funnel end to end.
Free
Free to install
Cart customization
A slide cart drawer that sells for you
Addy adds a fully customisable slide cart drawer to your Shopify store with AI in-cart upsells, volume discount bundles, subscriptions, a free shipping bar and shipping protection — then targets it per Market, customer tag or even per block.
- AI upsells, bundles and product recommendations that lift average order value
- Different carts for different Markets and customer tags, with block-level rules
- Volume discounts, free gifts, shipping protection and progress-bar reward goals
- Estimated delivery dates, countdown timers, announcement bars and trust badges
- A library of FOMO blocks plus custom HTML and CSS for total design control
Built for Shopify
4.8 (104)
Free plan, then from $9.99/mo
Product bundles
Turn one product into a bigger basket
Addly gives you every offer type that lifts basket size — frequently bought together, bundle discounts, cross-sells, quantity breaks, volume discounts, product add-ons and mix-and-match — plus AI offers built from your real purchase history.
- Frequently bought together or a slider upsell with a variety of layouts
- Volume discounts targetable to specific variants to clear slow-moving stock
- Product add-ons and mix-and-match offers with layered discount logic
- Translatable into 13 languages with full multi-currency support
- Analytics that surface your best performing offers, not just totals
Built for Shopify
5.0 (42)
Free plan, then from $3.99/mo
Upsell and cross-sell
Give every cart a finish line
Goalify combines progress bars, cart goals, stackable rewards and AI upsells into one experience. Build a free shipping bar, hand out a free gift with purchase, run BOGO and show AI recommendations — set up in under two minutes with no code.
- Rules based on cart value, cart quantity or specific products in the cart
- Stackable rewards: free gift, free shipping and order discount at once
- Unlimited rules and rewards — stack as many goals as your margin allows
- Multiple design templates, fully localised with translation and currency conversion
- Use it as a top bar and as a widget you can place anywhere in the theme
5.0 (4)
Free to install
Product bundles
Catch the moment before it is lost
Monet shows upsells, cross-sells and bundles as popups triggered by the three moments that matter most: add to cart, checkout initiation and exit intent. Add AI recommendations and you capture revenue that would otherwise walk out the door.
- AI product recommendations inside every popup, running on autopilot
- Three triggers that cover the whole funnel: add to cart, checkout, exit intent
- Popup templates for bundle, cross-sell and add-on offers
- Multi-currency and translations so you can lift revenue internationally
- Analytics that show exactly which popup converts and which one does not
5.0 (1)
Free to install
Order editing
Turn "cancel my order" into a bigger order
Reviso lets customers edit their orders after checkout — address, products, quantities, variants — before anything ships. Support tickets fall, cancellations fall, returns fall, and AI upsells turn the edit screen into a second revenue moment.
- Cancellation deflection flow with incentive discounts or a free gift
- Post-purchase AI recommendations and recently viewed products to lift AOV
- Fewer returns because shoppers fix mistakes before fulfilment, not after
- Smart rules controlling edits by country, customer tag and order conditions
- Change address, shipping method, variants or quantities without a support ticket
Side by side
Which app should you start with?
Pick by the stage of the journey you want to improve. They stack, so adding a second app later is additive rather than duplicated.
| App | Best for | Category | Rating | Pricing | Built 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 |
Better together
The full-funnel stack
Four moments decide how much a session is worth. Ninety9 covers all four.
1. Product page
Addly adds bundles, quantity breaks and frequently bought together before the shopper ever reaches the cart.
2. Cart
Addy replaces the default drawer with upsells, reward goals and delivery estimates. Goalify adds the progress bar.
3. Exit & checkout
Monet catches add-to-cart, checkout-initiation and exit-intent moments with a single targeted offer.
4. Post-purchase
Reviso turns edits, address changes and cancellations into self-service — and a second upsell.
From the blog
Playbooks, benchmarks and teardowns
Practical writing on average order value, cart design, bundle maths and post-purchase experience.
Average Order Value
How to Increase Average Order Value on Shopify (The Complete 2026 Playbook)
A practical, maths-first guide to raising Shopify AOV — the eleven levers that work, where each one belongs in the funnel, and how to tell which is worth your next week.
10 min read
Shipping & Fulfilment
Goalify
Goalify
How to Set a Free Shipping Threshold That Increases Profit, Not Just AOV
The percentile method for choosing a threshold, the margin check that stops it losing money, and why per-country thresholds beat one global number.
5 min read
Retention & Post-Purchase
Reviso
Reviso
Post-Purchase Order Editing on Shopify — The Complete Guide
What customers actually want to change after checkout, which edits are safe to allow, the rules you need around them, and why the edit screen is a revenue surface.
6 min read
Cart & Checkout
Addy
Addy
The Shopify Cart Drawer Guide — Design, Speed and Upsells That Convert
What separates a cart drawer that sells from one that just lists items — layout order, the six blocks that matter, performance rules and the upsells worth adding.
6 min read
CRO & Analytics
Monet
Monet
Exit-Intent Popups on Shopify — The Honest Guide to What Actually Works
How exit detection really works on desktop and mobile, which offers convert on the way out, and why an exit popup is the only popup that cannot cost you a conversion.
5 min read
Retention & Post-Purchase
Reviso
Reviso
Partial Refunds vs Order Edits — Fix the Shopify Order Instead of Unwinding It
When to let a customer add, swap or remove a line after checkout, and when a partial refund is the cleaner (and cheaper) path.
1 min read
Start with one app, free
Every Ninety9 app has a free plan and installs in a couple of minutes. Pick the moment in your funnel that leaks the most and fix it first.
Every app installs from the Shopify App Store. No theme code, no developer needed.