Most runners end up choosing between these two. Not because they are equivalent — they are not — but because they sit at similar price points and represent two different philosophies about what a watch is supposed to do. Garmin builds sport computers that happen to look like watches. Apple builds computers for your wrist that happen to track workouts.

Battery Life: The Most Important Spec

The Garmin Forerunner 265 runs 13 days in smartwatch mode, 20 hours with GPS active. The Apple Watch Series 9 runs 18 hours total with normal use — about 6–7 hours with GPS active. For runners who go longer than that, the conversation ends here. If you are training for a marathon, an ultra, or any event over 6 hours, the Series 9 is not a viable option. The 265 is.

Even for shorter distances, the charging rhythm difference matters. With Garmin, you charge once a week and forget about it. With Apple Watch, you charge every night — and you cannot wear it to sleep without sacrificing the next morning’s workout data, or vice versa. That is not a dealbreaker for casual athletes, but for people training consistently, it becomes a recurring logistical problem.

GPS Accuracy

The Forerunner 265 uses multi-band GPS (L1 + L5 dual frequency) which holds signal more accurately in urban canyons, under bridges, and through tree cover. Apple Watch Series 9 also has multi-band GPS but the antenna implementation is less optimized — primarily because it is competing for space with the watch’s many other radios.

In practice on open roads or tracks, both are accurate enough that the difference is academic. In dense cities with tall buildings, the Garmin holds a cleaner track. If you run in New York, Chicago, or any dense urban grid with canyons, this matters. If you run in the suburbs or on trails, it probably does not.

Training Analytics: No Contest

This is where Garmin wins decisively for serious runners. The Forerunner 265 provides: Training Readiness (combining HRV, sleep quality, recovery time, and training load), Training Status (whether you are in peak, maintaining, or overreaching), VO2 Max estimation, race predictor times for 5K through marathon, daily suggested workouts calibrated to your fitness, and Running Dynamics if you add a chest strap or running pod.

Apple Watch provides: heart rate, pace, distance, cadence, and a workout log. The Fitness app shows basic trends over time. There is no training load concept, no readiness scoring, no race prediction, and no periodization awareness. Apple’s training ecosystem is designed for people who exercise. Garmin’s is designed for people who train.

Smartwatch Features: Apple Wins Everything

The Series 9 is a significantly better smartwatch. Faster processor, better notification handling, a vast App Store, Apple Pay, Siri, seamless iPhone integration, better voice calling, crash detection, and fall detection. The double-tap gesture is a genuine quality-of-life improvement. The display is bright, responsive, and navigable with gloves on.

Garmin’s Connect app is functional and powerful for training data but not enjoyable to use. The watch face is navigated via buttons and a touchscreen that is secondary to hardware controls. Third-party app support is limited. Notifications are readable but not actionable. You cannot reply to messages. If you are used to Apple Watch’s responsiveness, Garmin feels like a tool rather than a device.

That is not a criticism — it is a design choice. Garmin optimizes for sport. Apple optimizes for life. The question is which one you are buying a watch for.

Head-to-Head Specs

Who Should Buy Which

If you run fewer than three times a week and use your watch primarily as a smartwatch with workout tracking as a secondary feature, the Apple Watch Series 9 is a better buy. The ecosystem integration, notification experience, and daily usability are significantly better, and casual training does not require Garmin’s depth of analytics.

If running is a primary focus — you are following a training plan, you race, or you care about improving performance over time — the Garmin Forerunner 265 gives you tools the Series 9 cannot match. The training analytics alone justify the price difference, and the battery life eliminates the logistical friction that quietly undermines Apple Watch ownership for serious runners.

The honest answer for most people: if you already have an iPhone and you are considering your first fitness watch, start with Apple Watch. If you have had Apple Watch and found yourself wishing it tracked your training more seriously, upgrade to Garmin. That progression makes sense for more athletes than you’d expect.

Related reviews: Garmin Forerunner 265 Review · Apple Watch Series 9 Review · Polar Pacer Pro Review

Which Is Better for Daily Wear

The Apple Watch Series 9 is a better daily watch than the Garmin Forerunner 265 for most people who are not primarily athletes. The notification system on Apple Watch is unmatched — you can reply to messages, approve calendar events, handle Siri requests, and manage your day from your wrist without the clunky third-party workarounds Garmin requires for the same functionality. The AMOLED display is more visually appealing as a watch face. Apple Pay works everywhere contactless payments are accepted. The social wear of Apple Watch is also different — it looks like a premium watch. The Forerunner 265 looks like a sport watch.

The Garmin Forerunner 265 is the better daily wear option for athletes who spend significant time training and want the watch to serve their training above all else. The 13-day battery means you never think about charging. Garmin Connect’s daily briefing — morning HRV status, Training Readiness, Body Battery — gives you training-relevant data before you even get out of bed. The sport watch aesthetic signals that this is a training tool, which is accurate.

Ecosystem Lock-In: What Switching Costs Look Like

Both platforms create ecosystem switching costs worth understanding before you commit. Apple Watch is deeply integrated with iPhone, iCloud, and the Apple Health ecosystem. Your health data — years of step counts, heart rate, sleep, workouts — lives in Apple Health. Moving away from Apple Watch means losing that integration, though Health data can be exported. If you switch to Android, Apple Watch stops working entirely.

Garmin stores your training history in Garmin Connect, which is device-agnostic — your data is accessible via web browser and can be exported in standard formats. Switching from one Garmin to another is seamless. Switching from Garmin to Apple Watch means leaving your training analytics history in Garmin Connect unless you manually export and import it. Neither platform makes leaving easy, but Garmin’s data portability is marginally better for athletes who want to remain platform-flexible over time.

Health Monitoring: Apple Watch’s Medical Use Cases

Apple Watch Series 9 includes features that go beyond fitness tracking into genuine medical monitoring territory. The ECG app (electrocardiogram) can detect atrial fibrillation with clinical-grade accuracy that has been validated by the FDA. The Irregular Heart Rhythm Notification feature monitors in the background and alerts you to potential AFib episodes passively. Crash detection can automatically call emergency services if it detects a severe impact and no movement. Fall detection escalates to emergency services after a hard fall if you do not respond to an alert within a minute.

Garmin has no equivalent medical features. It is a sports performance device, not a medical device. For athletes over 40 who have family history of cardiac events, or anyone for whom the medical monitoring features are a genuine consideration, the Apple Watch Series 9 provides capabilities that no Garmin model matches. For healthy athletes under 40 whose primary concern is training performance, these features are likely irrelevant to the buying decision.

This guide covers the most important considerations for making the right decision. The best tool is the one you will use consistently — accuracy of data matters less than the habit of collecting and acting on it. Whether you are choosing between devices, building a tracking routine, or optimizing an existing system, start with one clear goal, pick the tool that serves it best, and give it at least eight weeks before evaluating whether it is working. Data compounds over time; the athletes who get the most from their devices are those who have been consistent the longest.

Related:Garmin vs Apple Watch for fitness