Previously bought 8 TrackRs. Almost standing on them and undetectable. Returned them because the battery ran out in a month and not the quoted year, received 8 upgraded replacements. Purchased 4 Chipolos, and they work! Shared location tracking, but not crowd GPS, but it works. One stopped working so opened it up and found water damage, and within 24 hours had a free replacement send by Courier!!!
You can’t argue with that! At the end of the day, with rivalled versions of the same thing, the one with the best customer service will win, and Chipolo is the one!