Birdbuddy vs Kiwibit

This is the comparison where the specification sheet and the sensible purchase disagree most sharply, which makes it the most interesting one on the site.

Kiwibit publishes 4K and claims identification of over 10,000 species, at a price below the Birdbuddy. Birdbuddy publishes 2K, no species count, and costs more. On paper that is not close. In practice it is very close indeed, and the reasons are worth understanding because they apply to the whole category.

Resolution is the most-printed and least-decisive specification here. The subject is a small bird, a few inches from a small lens, usually backlit against the sky, and the footage is compressed for upload over a 2.4GHz link. Under those constraints the limiting factors are light-gathering and dynamic range - and Birdbuddy publishes a 1/2.7" sensor with HDR while Kiwibit publishes no sensor dimension at all.

So the honest position: Kiwibit may well produce the better image, and nothing published lets anyone determine that. What can be said is that the 4K figure does not establish it, and that a maker publishing the harder number is making a comparison it expects to survive.

The IOC World Bird List recognizes 11,227 species, 164 extinct. Kiwibit's claim is therefore near-total global coverage. The ABA checklist for all of North America is 1,161 species, and a US backyard feeder sees a few dozen a year - all of which Birdbuddy's app handles despite publishing no number.

A larger label set can also make a classifier worse at your birds, not better: more classes means more opportunities to confuse a house finch with something it could not possibly be. The audit goes through this properly. Either way, this number should not carry your decision.

These are app-dependent devices. A feeder whose maker stops publishing the app is a plastic box with a dead camera in it, and that risk scales inversely with how long the company has been around. Birdbuddy has the longest history in the category. Kiwibit is newer and has already changed name once, from Beako.

We have no evidence of any problem with Kiwibit and will not imply one. But if you are buying something you expect to run for five years, the age of the company behind the app is a legitimate input - and it is the strongest argument for paying more here.

Kiwibit's no-subscription edition. It removes the ongoing cost entirely, which over three years is worth more than the difference between these two cameras - and it makes the value argument decisively rather than marginally. That is covered in the no-subscription roundup and it is why the same model tops the gift roundup.