Yes and no. It's important to understand that there is a distinction between your phone moving away from the item being tracked, and the item moving away from your phone. For example, if someone accidentally takes your suitcase off a shuttle bus and you're using a Tile Pro, you won't get a notification to tell you so. Partly that's because Tile's Smart Alerts only warn you when you have left something behind when you leave a known place, such as home or work. They use geo-fencing to do this, and the feature also requires you to subscribe to Tile Premium, for a monthly or annual fee. It's the same with an Apple AirTag. You can enable 'Notify when left behind' alerts, but again, you have to specify a location from which the item could be left behind.