Amazon: Impulse shopping, made all too easy on your phone—it remember products you scan (either a photo or barcode) so you can buy them later, too. Astrid: If you suck at remembering things, Astrid is a simple task manager and to-do list. Killer feature? It syncs with the Remember the Milk.
![Essential Android Apps](https://cdn-ak-scissors.b.st-hatena.com/image/square/1c4ceb14dd6d9eb71ec6887c41f2277f9543be78/height=288;version=1;width=512/https%3A%2F%2Fi.kinja-img.com%2Fimage%2Fupload%2Fc_fill%2Ch_200%2Cq_80%2Cw_200%2F743983ef40322777a7049971bf4faeae.png)