Findy from Foxsmart systems GmbH is the linked application to the Foxsmart locator device. it is the smallest, it is cheap and it is the only application that can provide a direction and distance to your lost item.
You can manage several locators devices with Findy, Findy will display your last known location (last place the Findy detected a disconnect from the locator) and a smart tracker system that will guide you to your lost item - first the direction and then the distance to the item. you can also play a buzzer (when connected) to get a sound indication of the location of your item.