- XY Find-It
- Bringrr & BringTags
- Find’Em Tracking
- PROTAG Duet
- Click N'Dig
- Wallet TrackR
The review is easy: All of them require a battery and cost between $30-$100. Unlike the WallStreet Journal I think this is ridiculous. It is the electronic version of Coal Rollers.
In contrast to Bluetooth, NFC (Near Field Communication) would be an ideal candidate for this application, as the tags require no battery. But physics still puts some hard limit on their range. More than 20cm are currently not possible.
As far as I am concerned, I came to the conclusion that this is nothing for me. Way to much battery waste! So I decided I'd rather continue use my build-in brain for this. It is not that bad after all.
But wait! There is one solution that does not require a battery. It is