Stride Kai, Fitness Tech Reviews
The Garmin vs Apple Watch debate has been running for years, and by now the standard verdicts are well established. Garmin for serious athletes, serious battery life, and serious data. Apple for iPhone users who want something that works seamlessly with everything else on their wrists.
Both of those verdicts are largely correct. Neither of them answers the question that most people searching this comparison are actually asking.
Which one will help me lose weight and get fit?
Let's get the specs out of the way so we can get to the part the review sites skip.
| Garmin | Apple Watch | |
|---|---|---|
| Battery life | Up to 2 weeks (Fenix models). Forgot your charger on a 14-day trip? No problem. | 1-2 days. Daily charging is not optional. |
| GPS accuracy | Multi-band GPS, widely regarded as the most accurate available in a wrist device. | Solid GPS, excellent for most users. Slightly less precise on longer routes. |
| Fitness data depth | Granular. VO2 max, training load, recovery time, body battery, sleep stages. Built for athletes. | Comprehensive for everyday users. Less detailed for serious training analysis. |
| iPhone integration | Works with iPhone, less seamlessly. | Seamless. Calls, messages, Siri, Apple Pay, all apps. The best smartwatch for iPhone users. |
| Step accuracy | Both admit wrist-based devices add phantom steps during arm-movement activities. | Both admit wrist-based devices add phantom steps during arm-movement activities. |
| Price range | £200 to £1,200+ | £249 to £799 |
| Best for | Runners, cyclists, hikers, outdoor athletes, anyone who hates daily charging. | iPhone-integrated daily life, general health tracking, casual to moderate fitness users. |
If battery life matters most to you, Garmin wins clearly. If you want the best daily smartwatch experience on an iPhone, Apple wins clearly. For pure fitness tracking data depth, Garmin leads. For ease of use and ecosystem, Apple leads.
Neither brand is a bad choice. The question is whether either choice will make you fitter. And this is where the review sites tend to stop asking questions.
Think about every Garmin vs Apple Watch comparison you've read. They test battery drain. They test GPS route accuracy. They compare heart rate sensor readings against medical-grade monitors. They time how fast each watch charges.
What they don't test is this: does wearing this watch produce meaningful fitness improvement over three to six months?
We already know the answer from the Fitbit research. A 2016 study published in The Lancet tracked 800 people wearing fitness trackers for a full year. After six months, not one showed measurable improvement in weight or blood pressure. After a year, 90% had stopped using the device.
Garmin and Apple Watch are more sophisticated devices than the Fitbit Zip used in that study. But the fundamental dynamic is the same. A watch measures. It tells you what happened. It does not tell you what to do differently to stop the same thing from happening again tomorrow.
The Apple Watch's daily charging requirement is usually discussed as a minor inconvenience. In practice, for many people, it creates a genuinely meaningful problem.
To charge an Apple Watch, you take it off. While it's off, it's not tracking anything. So you charge it at night and miss your sleep data, or you charge it during the day and miss your activity data. Many people charge it on their desk while working, which is precisely when arm movements from typing and reaching are generating the phantom steps that inflate your count.
More importantly, the charging ritual creates friction. You need to remember the charger when you travel. If you forget it, the watch is a bracelet by day two. For a device whose value is predicated entirely on continuous wear, this is a real limitation that the spec comparisons consistently understate.
Garmin's multi-week battery life is a genuinely meaningful advantage here, not just for athletes on long expeditions, but for ordinary people who simply want a device that's always there without requiring management.
Here's the thing that unites Garmin and Apple Watch despite their differences. They are both answers to the question: how do I measure my fitness? Neither of them is an answer to the question: how do I change what I'm doing so that my fitness actually improves?
Garmin gives you body battery score. It tells you when you're fatigued and when you're recovered. It shows your training load over weeks. All of that data is genuinely useful if you're a trained athlete who knows how to interpret and act on it.
For the majority of people who buy a fitness watch hoping it will motivate them to move more and lose weight, the data tends to be interesting for a few weeks and then quietly ignored. The dashboard gets checked less and less. The step goal becomes background noise. And eventually, the device ends up in a drawer, which is where 90% of fitness trackers end up within a year.
The most expensive GPS watch in the world cannot fix a walking method that doesn't work. And the most beautiful smartwatch UI cannot make stepping to the fridge and back count as meaningful exercise, even if it records the steps.
The answer is not the hardware on your wrist. It's the method underneath the hardware.
Dr. Hiroshi Nose spent 20 years at Shinshu University in Japan studying this exact question. What he found was that the specific way you walk, not how many steps you take or what device you use to count them, determines whether walking produces real, lasting fitness results or modest, temporary ones.
His research on interval walking, alternating fast and slow walking at precise durations, showed improvements in cardiovascular fitness, fat loss, blood pressure, and leg strength that vastly outperformed steady-pace walking. Over 700 participants. Five months. Replicated results. Published in peer-reviewed journals.
His participants didn't wear Garmin watches. They didn't use Apple Watches. They followed a method. And the method is what changed their bodies.
"Garmin tells you how far you went. Apple Watch tells you how many calories you burned. Neither one tells you whether the way you walked was ever going to change your body."
The question behind the comparisonBuy a Garmin if: you're a runner, cyclist, or outdoor athlete who trains seriously and wants the deepest fitness data available. The battery life alone is worth the switch from Apple for anyone who has ever had their watch die mid-run.
Buy an Apple Watch if: you're an iPhone user who wants the best all-round daily smartwatch experience. The health monitoring is excellent, the integration is seamless, and for general wellness tracking it's hard to beat.
Understand the limits of both: Neither watch will tell you that your walking method is wrong. Neither will tell you that your body has adapted to your current routine and stopped burning fat. Neither will give you the structure that actually produces change. They measure. They don't coach.
Stride Kai works alongside whatever watch you own, or without any watch at all. It guides Dr. Nose's exact interval walking protocol through audio and vibration cues, so the method that actually burns fat is built into every session. No charging. No phantom steps. No data without direction. Free 3-day trial.
Neither is reliably better than the other for producing weight loss. Both measure activity well. Neither addresses the core issue, which is whether the type of walking or exercise being done is structured to prevent metabolic adaptation and actually burn fat. The method matters more than the device.
More accurately than many devices, particularly for running and deliberate walking. However, like all wrist-based devices including Apple Watch, Garmin admits that arm movements from everyday activities, cooking, typing, and gesturing, can register as steps. The more relevant question is whether step counting itself is the right metric for fat loss, which the research suggests it isn't.
Yes. Stride Kai works on your phone independently of any watch. Your existing device can continue tracking your heart rate, distance, and stats. Stride Kai handles the interval timing and cues. The two work alongside each other perfectly.
Garmin, by a significant margin. Most Garmin sport watches last at least a week, with Fenix models lasting up to two weeks. Apple Watch Series models typically require daily charging, with the Ultra lasting around 36 hours in normal mode.
Related reading: Does the Fitbit actually help you lose fat? · The Japanese Walking Method, what it is and why it works