Tile's trackers already help you find lost items, but now they might help you before the wave of panic hits. The company is relaunching Smart Alerts in beta to automatically warn when you've left a tracked item behind if it's been there for at least five minutes. If you rush out of the coffee shop without your bag, you'll ideally get an alert before you've reached your car. You'll need a Premium subscription ($30 per year or $3 per month), but it might be a small price to pay if you can't bear the thought of leaving a valuable item alone for more than a few minutes. The beta will be available in December.