Back In Stock Alerts Email+SMS

Back In Stock Alerts Email+SMS


Out of Stock + Preorders + Klaviyo & Mailchimp Integrations

4.7 of 5 stars(3 reviews)

Easy to customize

Customize the look-and-feel to match your site. Control when to show the form and when to send notifications.

Send automatic alerts

Send back-in-stock alerts when out of stock or pre-ordered products are available. Integrate with your Email Service Provider.

Drive traffic and sales

Send Email and SMS stock notifications to let customers know when their chosen items are back in stock.

About Back In Stock Alerts Email+SMS

Bring customers back to your site with back-in-stock alerts:

Shoppers rarely purchase on their first visit. Help them pick up where they left off the next time they visit your site. Enable your customers to sign up for product alerts. Automatically notify them when those products are updated.

When you have an in-demand product, inventory sell-out is bound to happen! With Restock Master, you can notify your customers via email and SMS when the product that they just missed out on, is back in stock!

Increase sales with Restock Master App by HulkApps:

  • Don’t miss out on sales when your inventory temporarily runs out.
  • Shoppers can subscribe to out of stock products and it's variants.
  • Automatically notify shoppers when a product comes back in stock. You don't have to do anything.

Top Features

  • Unlimited emails/SMS alerts
  • Automated restocked notices
  • Follow-up reminders
  • Split email delivery into groups
  • Capture valuable data via Reports
  • Email platform integration

What our Restock Master App has to offer merchants?

1. Email delivery system

  • Lets you have full control over the number of customers notified via the app.
  • Lets you set the notification preferences
  • Set email delivery interval between a group of customers
  • Lets you configure the minimum quantity of the product to send alerts.

2. Robust theme integrations

No coding required. Few minutes work for a non-tech merchant to integrate the theme via automatic theme integration.

3. Easy customization

The app lets you customize the appearance (form & button) as well as the content of the restock alerts to make sure it complements your store theme.

4. Opportunity to grow contacts list

Customers can opt-in using their email address or mobile number. This gives you the perfect opportunity to retarget them with future sales campaigns and promote products they’re likely to be interested in buying.

5. Data-driven inventory management

With Restock Master, you can see how many customers have signed up to receive notifications about specific items, giving you a data-led approach to your inventory management.

6. Manage email activity

Manage how often you want to receive updates/alerts every time a customer creates a notification.

World-class Customer Support Team

New apps may seem daunting but in any case, if you get stuck somewhere in the middle, feel free to contact our around the world, around the clock support team.

Final thoughts

Ready to bring customers back to your site with back-in-stock alerts? Install the app & get started right away!

Any development store can use the app for free until they upgrade their account to a paid Shopify plan.

Your data is safe with us! The app is 100% GDPR complaint

Integrates with

  • Mailchimp,
  • Klaviyo

See the app in action

Explore how the app works in an example store.

View example store

Media gallery


Pricing 7-day free trial

See all pricing options
Basic Plan


  • - Unlimited restock email notifications / SMS alerts

  • - Connect to Mailchimp & Klaviyo

  • - Activity reports & data exports

* All charges are billed in USD. Recurring charges, including monthly or usage-based charges, are billed every 30 days.

Overall rating
4.7 of 5 stars
Based on 3 reviews

  • 5 of 5 stars
    67% of ratings are 5 stars
  • 4 of 5 stars
    33% of ratings are 4 stars
  • 3 of 5 stars
    0% of ratings are 3 stars
  • 2 of 5 stars
    0% of ratings are 2 stars
  • 1 of 5 stars
    0% of ratings are 1 stars

Most recent reviews

Jiggy Puzzles

This app is great, especially for the price. Others serving this function are surprisingly expensive, but this one offers much more bang for your buck and is pretty quick to set up. Their support responds extremely quickly and is patient and happy to help, which is a huge game changer, especially in this world.

The app is easy enough to use, but the interface could be more user friendly. Navigating isn't very intuitive when setting up, but it's easy enough to figure out if you're fluent in Internet. I know this is a pretty new app from this team, so the finer details will be smoothed out in time. I look forward to future releases that add in more admin tools + clean up the UI/UX a bit.

We tried to use a different free app for our waitlists first, but couldn't get the button to appear without refreshing. I had the same issue with this one, but eventually figured out that it was because I had a setting in my theme enabling 'quick shop' which triggers a popup instead of the actual product page. Took me about a week to figure out, tried all sorts of coded solutions to no avail, only to find that setting buried so just wanted to mention in case anyone else is experiencing the same thing. Caused quite a headache.

Great work guys, thanks for being awesome!

Developer reply

April 2, 2020

Hi there! Thanks so much for taking the time to leave us a review. We definitely gain a lot of insight from the feedback merchants leave on our reviews page. So thank you for your inputs.

We appreciate the kind words about our products and support. :-)

Please don't hesitate to reach out if you need any other assistance! We are always standing by to help.

Have a beautiful day! Stay safe!


I installed this on Helenskinz Vape Shop NZ and it was a breeze to install, very good customization and simple to complete. If you want to move your button it's not difficult to move it in your Liquid pages. I think it's the Best App I have ever installed on our website/shop, I am looking forward to stock arriving now because a lot of it will be sold very quickly when added to the inventory because many people have already used the buttons on a few different pages and all of them are going to be notified the moment it is in stock. It looks cool, it's just the best feature you could add to your shop. To view our button you have to find an out of stock item, currently there's a couple to view, here's a page to see my Button, customized to Blue. Here: >> I have no affiliation to the App maker but I am happy to say once again, this is the best App I have installed, I highly recommend it. Check it out it's well worth the time. I wish I had this App years ago! I give it 9/10 easy!!! I have been building web shops for over 12 years and this one really caught my eye. The App maker has been in touch too to ensure everything is A OK! I didn't need any help at all, too cool :-) Thanks, well done!

Developer reply

March 16, 2020

Hi there! Thanks for leaving us such a wonderful review, and for allowing others to see how it looks by linking your website. :-)

We are thrilled that you loved your experience; our staff will definitely be happy to read what you wrote. We put customer experience and satisfaction as our priority, and your review reaffirms the hard work we put in every day. So thanks for your kind words and we look forward to seeing you again.

Have a beautiful day!

Bsai Seguridad y Controles

It has everything I was looking for !, the application allows you to customize the notification email as well as the SMS in a quick and easy way, notifications arrive to my clients without delay and the application allows me to review reports from all clients subscribed to notifications . Before I had an application that notified by PUSH but it didn't work well and
I did not notify my clients when an product was available again, with this application I know that my clients will be notified so that I do not lose sales. The technical support service is outstanding and friendly.


¡Tiene todo lo que buscaba!, la aplicación permite personalizar el correo de notificación al igual que el SMS de una manera rápida y fácil, las notificaciones llegan a mis clientes sin demora y la aplicación me permite revisar informes de todos los clientes suscritos a notificaciones. Antes tenia una aplicación que notificaba por PUSH pero no funcionaba bien y
a mis clientes no les notificaba cuando un articulo estaba disponible nuevamente, con esta aplicación se que mis clientes estarán notificados haciendo que no pierda ventas. El servicio de soporte técnico es sobresaliente y amable.