You can see whether or not a seller has raised the price of an item so they can mark it down and pretend it's on sale.
### Desktop extentions
[Firefox](https://addons.mozilla.org/firefox/addon/keepa/)
[Chrome](https://chrome.google.com/webstore/detail/neebplgakaahbhdphmkckjjcegoiijjo)
[Opera (uses chrome ext)](https://chrome.google.com/webstore/detail/neebplgakaahbhdphmkckjjcegoiijjo)
[Edge (if you're gay)](https://microsoftedge.microsoft.com/addons/detail/ejefaeioamebhekmfaclajddbpnnobje)
[Safari (also for gays)](https://apps.apple.com/us/app/id1533805339)
### Mobile
[ApkMirror](https://www.apkmirror.com/apk/keepa-com/keepa-amazon-price-tracker/keepa-amazon-price-tracker-2-17-2-release/)
[Google faggotry](https://play.google.com/store/apps/details?id=com.keepa.mobile)
[Apple faggotry](https://apps.apple.com/app/keepa-price-tracker/id1518541385)
(post is archived)