If you have a hard time keeping track of your belongings, AKA if you can't remember where you left your keys on a daily basis, Adero Smart Tags might be for you.
Adero is an intelligent organizational system that consists of Bluetooth-enabled tags that communicate with each another and you through an app that's super easy to use. Turn things like a diaper bag, backpack, or gym bag into a smart object by placing a Smart Tag on it. Then stick Taglets on the essentials that go inside the bag, like chargers, headphones, water bottles, and keys. Now your bag knows if the essentials that belong with it are all together.
If an item is missing from your bag when you leave, you'll receive a notification on your phone letting you know the items that aren't together.
The Adero starter kit is $80, which includes one Smart Tag and three Taglets. Of course, there's the option to pay more to get more tags. So, if you're prone to losing things, that might be your best bet.