Colmi R09 review: can a $20 smart ring replace an Apple Watch at night?
A week of sleep tracking with the $20 Colmi R09 next to an Apple Watch Ultra. The sleep data matched. The sizing guide didn't.
About this site
I sell for a living, and most of the day is calls. The monitors, earbuds, mics and watches here are the ones I bought for that job, scored after weeks on the desk, with the price I paid. How I test
News
All newsApple's $299 HomeView ships November 13 with Siri AI in beta. Brazil and the EU are not on the list.
Apple announced HomeView, a new Apple TV 4K, HomePod mini 2 and an LG-built line of cameras, locks and thermostats. Prices, ship dates, what needs iCloud+, and where Siri AI works.
Cursor now comes bundled with Grok and X Premium. Other companies' AI models are billed on top.
SpaceX folded Cursor, Grok and X Premium into one plan from $8 to $200 a month. The $8 tier runs Grok models only. Third-party models bill separately from the $30 tier up.
Google's $180 Fitbit Edge runs a week per charge and has a replaceable battery. The coach costs $9.99 a month.
Fitbit Edge ships October 27 with a screen, GPS and a seven-day battery. Sleep tracking is free. Google's Gemini health coach needs a $9.99 subscription after three free months.
All reviews
By category
7.0Colmi R09, the $20 smart ring
The sleep data matched my Apple Watch. Colmi’s sizing guide didn’t.Should you buy it?
7.5Ray-Ban Meta Gen 2 after a month
Nobody in a client meeting has noticed the camera. Two things still hold them back.Should you buy them?
4.0Gawfolk GF005 after two weeks
Same brand as my main monitor, an unusual shape, and a very different score.Should you buy it?
8.0Gawfolk GF270J after two weeks
Budget 4K at a refresh rate Macs rarely get. Two weeks in, one thing I miss.Should you buy it?
7.0SoloCast after three years
Three years of calls. Then I moved it 15 cm and people stopped hearing me.Should you buy it?
7.0AirPods Pro 3 after 10 months and 3 pairs
Ten months, three pairs, and I still reach for them first.Should you buy them?
6.0Apple Watch Ultra (1st gen) after watchOS 27
Apple dropped it from watchOS 27. That changes who should buy one used.Should you buy it?
Field notes
All notesBuilding with AI without outsourcing taste
Where I let AI do the work, where I only let it help, and how I tell the two apart.
The outbound system that helped double revenue
Four years of building and fixing outbound at two B2B SaaS companies, and what each step did to the numbers.
How I built a SaaS alone and shipped it to the App Store
Seven apps that didn't talk to each other, one codebase for web and iOS, and eleven days of App Store review.
If you make desk gear, email me what it is. I’ll tell you how I’d test it and whether it fits this desk. You read the review when everyone else does.