It’s noisy on the beach, and you want to call your kids back (you want to go home, or they have gone too far in the water, etc.)
Have a wristband that strongly vibrates when you “call it” using a phone app or a dedicated transmitter “button.”
You don’t remember where you parked.
Have a small remote controlled device (dedicated or using a smartphone) that when activated, raises a visible signal on top of the car (a white flag or blinking extended telescopic “stick.”)
You go into a large multi-level parking garage, and would like to know where are the free spaces.
Each car entering is given a reusable parking card with dual functionality: use it to pay and exit, and it will show you on a map (a small screen) currently where you can find empty spaces to park, and where you are. It’s a live map guiding you to the available spaces.
It’s easy to find all the shops in the category that might stock the item you are looking for. But then you have to visit every store only to find out many don’t have the item you are looking for in stock at the moment.
Have an item based search app or website that allows you to browse at a much more granular level like “10 years old swim trunk.” It will show you all the items currently in stock, which shop you can get it and at what price.
You would like your VIP treatment the way you like it when going shopping.
A system that senses when a VIP card carrying member enters your store. Immediately a rep is alerted not only to this fact, but they also see their picture, their past purchases, and most importantly, their treatment preferences (approach and “tail” them, stay away until they call for you but be alert, etc.) gleaned from speaking to them and observing them in the past.