Sentinel watches the product pages you care about, across the stores you shop, and messages you the moment something is back in stock.
Public beta Free for up to 10 products. macOS (Apple silicon) and Windows.
Sentinel desktop notification nowSentinel Discord DM nowYou find the thing you want, and it’s sold out. So you bookmark it, check at lunch, and check again before bed.
Sentinel does the checking for you. Give it the pages you care about, on any store it supports, and it watches every one from your own computer. When something comes back, your phone buzzes at 3:12, not 8:05.
No scripts or browser extensions. Paste links, choose how often to check, pick where alerts go.
Copy product links or item numbers from any supported store and paste them in, one per line. Sentinel sorts each one to its store and starts watching.
Each store has its own settings. Set how often Sentinel checks and which proxies it uses, and every product on that store follows along unless you change it.
Use any mix of these. Every alert names the product, the store and the price, with a link straight to the page. Send a test to each one before you rely on it.
Stores notice when one address loads the same page every few seconds. Proxies keep your checks from getting you slowed down or blocked.
Every check is a page visit. Watch a few products every 30 seconds and that adds up to hundreds of visits an hour from your home connection. Stores answer that with slowdowns, captchas, or a block on your address. Proxies spread those visits across many addresses, so checks keep working and your own connection stays clean.
Sentinel doesn’t sell proxies or route anything through us. Buy them from any provider you like and paste them in as host:port, host:port:user:pass or user:pass@host:port. Passwords go into your computer’s keychain.
Group proxies into profiles and pick one per store. Sentinel spreads checks across the addresses in it, and tests each profile before you rely on it. Watching only a few products? You can start without any.
Each store is a plugin you install from Sentinel’s built-in Store, and new stores arrive without reinstalling the app. Sentinel isn’t affiliated with any of these stores.
When purchasing arrives, Sentinel will be able to buy an item with your own account the moment it’s back, on stores that support it. Here’s how it protects you.
Proxies are for watching. Checkout goes out over your own internet connection, the same one the store already knows from your normal shopping, so your order doesn’t look like it came from a stranger.
Store logins and card details are kept in macOS Keychain or Windows Credential Manager, not in Sentinel’s files. They never reach our servers and are left out of every backup and export.
Nothing is ever bought until you switch checkout on for a store and accept the terms for placing real orders.
New stores start in test mode, which stops before the order is placed. Set a maximum price or order total and Sentinel refuses anything above it.
Always the latest version. Sentinel is in public beta, so expect frequent updates. The app installs them itself. New to it? Start with the guide.