Ray Maker
Reviews sports technology at DC Rainmaker — watches, power meters and bike computers — in exhaustive detail, having tested them himself.
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What they believe
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Companies that avoid taking risks rarely succeed in the tech industry.
and sometimes you just fold the cards. Companies that don't take risks rarely succeed in tech.
dcrainmaker.comSaid 22 Sept 2026This on korrents
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A drop in heart rate variability values typically precedes the onset of noticeable sickness symptoms by about a day.
Generally speaking for me (and most people), if you start getting sick, your HRV values will plummet roughly a day or so before you have actual noticeable symptoms.
dcrainmaker.comSaid 18 Sept 2026This on korrents
The bold line is korrents’ wording; the quote is theirs. These 2: what they wrote before what they said aloud, one per source, newest first.
Beliefs
Korrents What they believe 11 beliefs — each backed by an exact quote.
Each is a — compiled by korrents.com, not by them: the one-line wordings are korrents', the quotes are theirs.
Recent
Companies that avoid taking risks rarely succeed in the tech industry.
and sometimes you just fold the cards. Companies that don't take risks rarely succeed in tech.
Amazfit T-Rex Dual Solar Hands-On: AMOLED meets Solar?!? Said 22 Sept 2026
A drop in heart rate variability values typically precedes the onset of noticeable sickness symptoms by about a day.
Generally speaking for me (and most people), if you start getting sick, your HRV values will plummet roughly a day or so before you have actual noticeable symptoms.
Garmin Fenix 9 Series In-Depth Review: Worth the Upgrade? Said 18 Sept 2026
Companies sometimes hold back already-built software features from older hardware to drive sales of new models.
Given this is almost certainly all the same codebase (like, literally, that's how it works now and is explicitly why the Fenix 8 is getting these features), that seems like the company is purposefully holding those features back to drive Fenix 9 sales.
Garmin Fenix 9 Series In-Depth Review: Worth the Upgrade? Said 18 Sept 2026
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Sleep phase and stage tracking data from consumer wearables is not accurate enough to present to users as reliable information.
As always, I don't compare/review the sleep phase/stage data, because doing so would be basically fake news.
Apple Watch Ultra 4 In-Depth Review: Does it Match the Hype? Said 17 Sept 2026
No industry standard exists for how a company defines a readiness or recovery score.
there is no industry standard for how to define a Readiness score; it's up to each company.
Apple Watch Ultra 4 In-Depth Review: Does it Match the Hype? Said 17 Sept 2026
Daytime HRV readings are too variable from minute to minute and hour to hour outside a resting state to be meaningful.
This is probably because they are incredibly variable minute to minute and hour to hour in a non-resting state.
Apple Watch Ultra 4 In-Depth Review: Does it Match the Hype? Said 17 Sept 2026
New always-on ambient-recording and audio-AI features in consumer wearables will prove controversial.
There are also new audio features that I suspect will be quite controversial down the road.
Apple Watch Ultra 4 & Series 12 Hands-On: Everything that’s New! Said 10 Sept 2026
Always-on ambient recording features that summarize nearby conversations raise privacy concerns for people around the wearer, not just the wearer.
I've got some legit concerns around the Siri Recap feature specifically, in terms of privacy (not just my privacy, but people around me).
Apple Watch Ultra 4 & Series 12 Hands-On: Everything that’s New! Said 10 Sept 2026
AI is one of the biggest challenges facing the structured workout training industry today.
one of Wahoo's biggest challenges is the same thing that's challenging the rest of the structured workout industry: AI.
Wahoo Launches Apple Watch App & Features Targeting Runners Said 8 Sept 2026
Free structured running workouts are now so widely available that paying for AI-generated versions adds little value.
Thus, in effect, you're paying for structured running workouts, which are a dime a dozen these days. You don't even need AI for that; you can find countless free ones on the interwebs with 2 seconds of work.
Wahoo Launches Apple Watch App & Features Targeting Runners Said 8 Sept 2026
Nearly every technology company today wants recurring subscription revenue.
Obviously, like every other company right now, they want that recurring revenue.
Wahoo Launches Apple Watch App & Features Targeting Runners Said 8 Sept 2026
What is a korrent?
A korrent is a belief a person has stated in their own words: one sentence stating the claim, backed by a quote and a source, kept at korrents.com.
Under a name here, the quoted block is what they actually said. The korrent beneath it is the claim those words support, in korrents' wording — tap it to see the record, its source, and who else holds it.
Nobody here wrote their own korrents. They are compiled from public statements, and a person can change their mind, which is recorded too.
Recommends rcmnd
rcmnd What they recommend 8 things — each backed by an exact quote.
Compiled by rcmnd.app, not by them: the quotes are theirs, and each links to the post it was copied from.
Recent
Recommends Garmin Fenix 6 Pro
There’s still really no competition here. If you’re looking for the most feature-packed higher-end watch
dcrainmaker.com 25 Nov 2021
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Liked Polar Vantage M2
In some ways, it’s really a disservice to assume that because these are budget options that they’re somehow bad.
dcrainmaker.com 25 Nov 2021
affiliate link
Recommends Garmin Forerunner 245
While this Garmin watch lacks some of the triathlon features the COROS Pace 2 has, it makes up for it with added running features like PacePro and in the case of the 245 Music, well, music.
dcrainmaker.com 25 Nov 2021
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Recommends COROS Pace 2
Arguably the single unit on this entire post with the most bang for the buck, the COROS Pace 2 is a full multisport watch that can do swim/bike/run/triathlon, but even more than that
dcrainmaker.com 25 Nov 2021
affiliate link
Recommends Samsung Galaxy Watch 4
The Galaxy Watch 4 is easily the best smartwatch that Samsung has ever made, and also notably, the first one on Wear OS.
dcrainmaker.com 25 Nov 2021
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Recommends Garmin Venu 2
As one might suspect from this lineup of four watches, the Garmin unit is the most sports-focused one of the bunch.
dcrainmaker.com 25 Nov 2021
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Liked Fitbit Sense
This one might come as a surprise to some, but the reality is that at Fitbit’s more reasonable pricing as of late, the Fitbit Sense is a pretty good option. And it’s a super well-rounded option
dcrainmaker.com 25 Nov 2021
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Uses Apple Watch SE
Out of all the Apple Watches I’ve used over the past year, the Apple watch SE is the one I’ve tended to use the most.
dcrainmaker.com 25 Nov 2021
affiliate link
Where they publish
Blog DC Rainmaker His reviews of sports and endurance technology. Has a feed.
Recent
- Garmin Bringing Edge 1060 Features to Older Units: Full Details! 30 Oct 2026 When Garmin announced the Edge 1060, they noted that the majority of features would come to existing Edge x50 series devices (Edge 550/850/1050), as well as a handful of features going to older x40 series devices (Edge…
- Zwift Plus Explained: Zwift Video Routes & Zwift Coach Hands-On 29 Oct 2026 Roughly six months after acquiring Rouvy, Zwift is starting to do things with it. Or at least, starting to emulate it. In this case, Zwift is rolling out a two-component premium tier called Zwift Plus, which includes bo…
- Fitbit Edge In-Depth Review: Worth the Upgrade? 26 Oct 2026 The Fitbit Edge could most easily be called the Fitbit Charge 7, but sometimes switching things up is a good refresh for companies and brands, and so here we are. In many ways, the Fitbit Edge will feel very familiar
Show 5 more
- COROS Dura 2 Solar In-Depth Review: The Good, the Bad, and The Ugly 22 Oct 2026 COROS has just announced the new COROS Dura 2, a unit that more than doubles the price of the existing and now discontinued Dura 1, while still maintaining its industry-leading battery life claims. Atop that, there’s a…
- Garmin Revamps and Opens Up Connect Developer API Program: All the Details 21 Oct 2026 After some 7 months of being ‘closed’ to new entrants, Garmin has re-opened and revamped the Garmin Connect API developer program, focused specifically on 3rd-party platforms that want to receive data files from Garmin…
- Garmin Edge 1060 Cycling GPS Hands-On: Everything You Need to Know! 20 Oct 2026 Garmin has just announced three new cycling products in a rare mid-October cycling-focused drop. This includes the new Garmin Edge 1060 flagship cycling GPS, the Garmin Edge Explore 3/3 Plus cycling GPS, and the Tacx Ne…
- Tech Tidbits: Withings Adds $100/year Apple Health sync Fee, and Omata is Back! 19 Oct 2026 Amidst what might end up being one of the more ‘robust’ weeks of the year in terms of new product announcements, I wanted to briefly mention/cover two items I thought were interesting. Let’s get right into it, cause I’v…
- Suunto Race 3S In-Depth Review: A Pricey Upgrade 15 Oct 2026 https://www.youtube.com/watch?v=lS7bp1QR5mI Suunto has just announced the new Suunto Race 3S, a small-form-factor watch that believes it needs a big-form-factor price increase. On top of that, Suunto has also launched a…
Link verified 20 Sept 2026. Recent items update automatically from the channel.
About the English under a post
Some people here publish in a language other than English. Where they do, this site shows a machine translation beneath the post, in this typeface — the site's own, not theirs.
The post itself is never changed, moved or hidden: what is set in the serif above is exactly what the person published, and it is what to quote them on. A translation can be wrong in ways that matter, especially about tone.
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