I only know of the tile option that requires the bluetooth Tile to come into range of a phone with the app installed. Seems like a long shot your bike gets found.

Was originally slated for US in the fall. Not sure how the pandemic has affected things.

https://seesense.cc/pages/see-sense-air

(I was a Kickstarter backer, looking forward to checking it out.)

Wouldn’t any competent thief just take that thing off the bike?

Assumes "competent" means

- they notice it. (I plan on mounting under saddle hidden by my stowed saddle cover.)
- they know what it is. (I don't plan on using the warning sticker.)
- they have access to the special security torx key required to remove it. (I don't plan on keeping said tool in my saddle bag). Or they're willing to remove and discard the saddle/seat post, I guess.

But, yeah, nothing is foolproof. Even being able to track location doesn't guarantee return of an undamaged bike. Some peace of mind nonetheless.