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Tutorial 2 min read

How to get notified when a product is back in stock

Watch the product page with a rule such as “size 10 is back in stock” and get a phone notification when it is. Here is the setup, what to do when the size or the store has to be chosen first, and how often to check.

Alex Lead Product Designer
UpdatedOctober 17, 2026 Read time2 min AudienceShoppers, resellers and ecommerce teams
A Monity check of a news page: the screenshot, an AI summary of the new stories and the list of text changes

To get notified when a product is back in stock, watch the product page with a rule about the size or variant you want, such as “tell me when size 10 is back in stock”. In monity.ai every check reads the page, compares it with the last one and alerts you only when your rule matches, by push notification, email, Telegram or any other channel. It works on any store whose product page shows stock to a visitor, not only stores with their own “notify me” button.

Step 1: Watch the product page

Click Ask Monity and describe it: “Watch this page and tell me when the medium size is back in stock”, with the product’s address. Monity AI creates the task, writes the rule and runs the first check. The free plan has room for 3 products.

Ask Monity in the monity.ai app on a phone, with a request typed in to watch a product page and say when a model is back in stock
The same Monity AI in the iOS and Android app: tap Ask Monity above the bottom bar.

Step 2: Be specific about the variant

A product page usually lists every size and colour. Name the one you want: “size 10 in black”, “the 16 GB model”, “any size from M to XL”. Monity’s AI reads every change against the rule, so a different size coming back doesn’t wake you up.

Step 3: Add a step if the stock depends on a choice

Some stores only show stock after you pick a size, a colour or a store, or enter a postcode. Add browser actions to the task, such as choosing the size, and Monity performs them before every check. Without that step, the page may simply not say whether your size is available.

Step 4: Get the alert on your phone

Install the monity.ai app for iOS or Android and you get a push notification when the rule matches. Telegram, email, Slack and the other channels work too, on every plan.

How often to check

Restocks can sell out fast, so check as often as your plan allows: every 3 hours on the free plan, every hour on Personal 1k, every 15 minutes on Personal 5k, and every 5 minutes on Personal 10k. You can limit checks to the hours a store usually restocks.

When it won’t work

  • Some large retailers and marketplaces block automated visitors. Monity reports those checks as blocked instead of pretending nothing changed.
  • If a product is only sold through a queue or a draw, there is no stock to watch on the page.

Related: tracking competitor prices automatically, getting an alert when a web page changes and restock and price-drop alerts.

FAQ

Questions people ask

Is a back-in-stock alert free?

Yes. The free plan watches 3 products, each checked every 3 hours, and sends alerts to any channel, including the app.

Does it work on Shopify stores?

Yes. Monity watches the public product page like a visitor, whichever platform the store runs on.

Can I also watch the price?

Yes. One rule can combine conditions: “size 10 is back in stock or the price drops below $100”.

Will I get alerts when other sizes change?

No, if your rule names your size. Changes that don’t match are kept in the task’s history but don’t alert you.

Written by

Alex

Alex leads product design at Monity, where the goal is simple: make powerful website monitoring feel effortless. From the plain-English setup flow to the way every alert is laid out, Alex.'s work is about removing friction so anyone — not just technical teams — can watch the pages that matter. Here, Alex writes about product design, usability, and the craft of making complex tools feel calm and obvious.

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