https://www.cnet.com/news/tile-pro-tile-mate-smart-trackers-get-replaceable-batteries-improved-range/

Tile's popular smart trackers compete in a crowded field -- the latest includes Samsung's SmartThings tracker -- but because they're limited to Bluetooth, with its lesser range, they're cheaper than those that offer LTE and GPS at $25 for the Mate and $35 for the Pro. Tile Premium costs $30 a year or $3 a month. At the moment, it only supports iOS apps. Android is "coming soon."

Most of the additional capabilities come via the subscription plan, including free battery replacements, the ability to manage a single Tile from multiple accounts, a 30-day location history for retracing your steps, and extended three-year warranty and text access to customer service.