Launch on a theme built to sell.
Start with Kalles, Ecomus, Athora or Vetro, the themes 48,000+ merchants already trust.
- Kalles, Ecomus, Athora and Vetro
- Conversion-focused layouts and presets
- Backed by The4 support
Ends in Offer ends November 30, 2026
Small apps. Serious growth.
Nitro Apps builds focused Shopify apps that help you design a better store, sell more per order and keep every page fast.
Watch a store level up, one Nitro app at a time
Judge.me
Klaviyo
EComposer
Loox
Weglot
Omnisend
Recharge
Growave
Boost Commerce
UpPromote
ReferralCandy
LitExtension
TinyIMG
Ryviu
Transcy
BSS Commerce
The Nitro toolkit
From the theme you launch on to the pages you ship next, every Nitro app handles one job and works on any Online Store 2.0 theme.
Start with Kalles, Ecomus, Athora or Vetro, the themes 48,000+ merchants already trust.
Customize
Fontify
4.9 ★ on the App Store
Put any Google or custom font on your theme in a few clicks, no code, with a font audit that keeps pages fast.
Sell more
Nitro Upsell
5.0 ★ on the App Store
Bundles, quantity breaks, cart upsells and shoppable video, plus AI that designs your store pages.
Restock
Stockify
4.5 ★ on the App Store
Take pre-orders on upcoming and out-of-stock products, with partial payments and pre-order discounts.
Inspire
Nitro Lookbook
5.0 ★ on the App Store
Pin products onto lifestyle photos and publish shoppable lookbooks that match your brand.
Build
ChatPage
5.0 ★ on the App Store
Build a landing page in Claude, ChatGPT, Gemini or Grok and publish it straight into your theme.
Real people on support
Merchants thank our support team by name in App Store reviews. Meet a few of the 16 people behind every reply.
Pre-orders
Effortless pre-orders for upcoming and out-of-stock products.
Shoppable galleries
Turn lifestyle photos into shoppable lookbooks with product pins.
AI landing pages
Build a landing page in Claude, ChatGPT, Gemini or Grok and publish it in your theme.
Every Nitro app comes with fast, multilingual support. Stuck on setup or want a hand matching your theme? Just ask.
Real 5-star reviews from the Shopify App Store. Hover to pause.
“After trying multiple lookbook apps that did not work well, this one by Nitro was just what we needed. It has great functionality and customization options.”
Amazing support team. Helpful, quick, and polite, especially Luna who answered all my questions very quickly and cordially. She helped me install the app and even created a specific CSS code to meet my needs. I highly recommend them.
This app is fantastic! Very easy to set up and works seamlessly with Shopify. The bundle and upsell features are exactly what I needed to boost my store’s sales. The support team is also quick, friendly, and always helpful.
Fontify has been an excellent app overall, but what really made the experience stand out was their customer support. … Their customer service truly saved the day.
Very useful app that you can sell pre-orders for any new products in plan or/and out of stock products. The app's support team is very professional and prompt with much patience.
Great app! Very user friendly and makes it so much easier to update the theme and import templates. The Shopable video feature is amazing.
An app with very good functionality and strong features. It allows you to customize almost everything according to the brand’s visual identity through code, and the support team is very helpful in this and other situations.
Product is great and the support team are fantastic, were able to help me customise my listings, align products and get items working where I couldnt. Highly recommend this product!
I’ve used this app for over two years, mainly for the Product Bundle features, and it’s definitely helped boost cross-sells in my store. The new Shoppable Video feature is fantastic as well, it saves me from installing another autoplay video app.
Chatting with customer service was so great! They took the time to answer my questions and gave great photos of how and where to add buttons and other items needed for the app to work with the product's webpage. So excited to continue working with the app to help my business grow.
Excellent and responive customer support team! I was trying to get a watermark removed from an image and they did it in less than five minutes! The shoppable image works great for using a map and putting hotspots for locations of products.
I spent hours going back and forth with ChatGPT trying to change the font on my website through manual coding and nothing worked … Fontify and the help assistant made it so easy and got it done in 30 mins total!
Absolutely love this app! Incredibly intuitive and easy to use. What really sets it apart is the outstanding support. … Highly recommend this app if you want hassle-free bundles and top-tier support!
This app is great, free, and gets the Job done. Eric from their support was very helpful as well!
This app is exactly what we were looking for. While still in its infancy, it will have the occasional glitch or bug, but Jade from support was quick to jump on the problem. Highly recommend!
Seamless setup & clear instructions on all steps required, if any doubts you have the support team on hand who will walk you through any queries you may have. Thank you to Hana & all the team at Fontify with the guidance & questions i had. I would highly recommend.
A great experience from start to finish. They were very helpful in assisting us with updating the fonts on our website and made the process seamless. Their responsiveness and attention to detail made a big difference. We’re very happy with the result.
Great addition to a store with Pre-orders and perks like timers to create urgency.
Our theme studio
Nitro Apps comes from The4, the studio behind some of the most popular Shopify themes. Our apps are built to feel at home in the themes merchants already love.
Practical AI tool reviews and step-by-step playbooks for Shopify merchants. No fluff, no paid rankings.
Start with the app that fixes your biggest bottleneck today.
Try Nitro Upsell