Buying an old phone or watch and using FindMy is a compelling counter argument. The problem is that the cost of that is meaningfully higher - it’s a $25 one time purchase vs ~$50-100 + a recurring ~$30/month. The size of the device is another one - the phone or watch is substantially bigger than an AirTag (or how small an AirTag could become over time). Finally, a phone or watch has a much shorter battery life to support tracking. You could trade off accuracy for a much longer battery life, but you’re still capped to maybe a couple of days or even a week if you really know what you’re doing. That’s compared with ~1 year of unattended AirTag use.
As for crime prevention, I think you’re overestimating how much of a benefit that would have. Stolen device protections remove the value from the stolen device. That’s not the case for your stolen bike - thieves don’t actually care if you can track the device because a) knowing where your stolen property is doesn’t actually aide in it getting recovered b) as long as they can move the stolen product along quickly enough the information becomes too stale to action on it (remember - police usually need a search warrant). My cousin’s car got stolen with AirTags in it but he got lucky in that the police did something about it - plenty of news stories of AirTags in cars with people trying to get the police to do something and the police not being able to for a variety of reasons. And that’s cars which are orders of magnitude more expensive than bikes that police won’t bother with. Look up VanMoof theft stories to convince yourself that tracking is useless: https://www.reddit.com/r/vanmoofbicycle/comments/zbexyr/upda...
Smart watches are not meaningfully larger than airtags if you take the wristband off, and a cheap prepaid plan for $5 or $10 would be more than sufficient. You also don't need FindMy because the cell network itself can triangulate.
There is a genuine need for anti-theft technology. Apple doesn't have to address that market, likely because they're afraid of brand damage, but stalkers already have plenty of options available.
As I said, the battery model is drastically different for active trackers. 7 days of surreptitious monitoring vs 1 year changes the risk profile of noticing these trackers / how many you can have before the logistics of recharging all of them wears on you. And if you’re unlikely to recharge each of these every single day, your protection drops on average to 3.5 days.
It’s not just brand damage - passive tracking using every single smartphone opted into the tracking vs active tracking where you have to expend more battery AND pay for an ongoing cellular connection each month is a tangibly different use-case with different threat models.
I'm assuming you're waiting until the end of the 7 day battery life to recharge it (e.g. you recharge every Sunday) and I'm assuming the probability of a theft is uniformly random throughout the week. Thus, on average, you'd expect stolen devices to only have half the battery left because there's equally many stolen on the first day (7 days of battery left) as on the last day (0 days), equally many stolen on the second day (6 days left) vs penultimate day (1 day left) etc etc. At scale, that would average out to stolen property having attached devices having half the advertised battery life.
You can argue that you'd be more dilligent about recharging but I'd counter that at scale you'd be the outlier. On average I'd actually expect an average battery life when stolen closer to 0 because people wouldn't be diligently recharging them & reattaching them (i.e. either the battery life would be 0 or the device wouldn't be attached to the desired property).
I don't think people would only charge when the battery runs out. More likely people would charge weekly, say on a weekend night or during their weekly WFH day or something like that.
A 14-day battery life would then mean an average of 10.5 days of protection, which isn't too bad.
> You can argue that you'd be more dilligent about recharging but I'd counter that at scale you'd be the outlier.
I don't know about this. For bicycle users, charging their rechargeable headlights and taillights regularly (typically once weekly) is very much a habit already. This is just another thing to charge at the same time, which is a time they aren't riding their bicycle.
As for crime prevention, I think you’re overestimating how much of a benefit that would have. Stolen device protections remove the value from the stolen device. That’s not the case for your stolen bike - thieves don’t actually care if you can track the device because a) knowing where your stolen property is doesn’t actually aide in it getting recovered b) as long as they can move the stolen product along quickly enough the information becomes too stale to action on it (remember - police usually need a search warrant). My cousin’s car got stolen with AirTags in it but he got lucky in that the police did something about it - plenty of news stories of AirTags in cars with people trying to get the police to do something and the police not being able to for a variety of reasons. And that’s cars which are orders of magnitude more expensive than bikes that police won’t bother with. Look up VanMoof theft stories to convince yourself that tracking is useless: https://www.reddit.com/r/vanmoofbicycle/comments/zbexyr/upda...