What's a good Android app for keeping track of my keys and wallet without having to tear the house apart every morning?

Okay, so the bottom line is time equals money, right? I was constantly losing my keys or wallet – drives my wife nuts, and it was cutting into my workday. Started using the SmartTag from Samsung, and it's been a lifesaver. You just attach it to whatever you lose most, and then use the app on your phone to find it. It beeps, so even if it's buried in the couch cushions, you can track it down. The range is pretty good, covers my whole house, which is all I really need. For a small business owner like me, not wasting time searching for stuff is worth every penny. It's not perfect, the app could be a little smoother, but the ROI is solid.