Buylert is an Android app developed by TNT-Studio that collects the best Amazon offers from across the web and notifies you only when an offer is available for items that really interest you. With Buylert, you can activate notifications for only the category or subcategory of objects that interest you, so you don't miss out on your favorite items.

It's important to note that Buylert is an affiliate of Amazon and earns a commission for each qualifying purchase. However, this doesn't change the final price for the user. The prices and availability of the objects, as well as the validity of the offer, are accurate only on the date of publication (visible in green color next to the title) and are subject to change. Additionally, Buylert only provides links to Amazon products and doesn't see the items themselves. The final price of the item is always displayed on the Amazon page at the time of purchase.

Overall, Buylert is a useful app for avid Amazon shoppers who want to stay on top of the best deals without being bombarded with notifications for items they don't care about.