Garmin Forerunner vs Apple Watch Ultra: Training or Calls?

Your watch can either help you plan tomorrow's training or let you take a call halfway through today's run. That's the core of the Garmin Forerunner vs Apple Watch Ultra decision. Garmin focuses on training and long battery life, while Apple gives you more ways to stay in touch from your wrist. Both track workouts, heart rate, and routes, but which model you pick matters a lot.

In this comparison, the Forerunner 965 goes up against the Ultra 3, since it's the Forerunner with full-color maps, multi-band GPS, and Training Readiness. If you want to spend less, the Forerunner 165 is still a solid running watch, just with fewer training and navigation features. It's also the model linked in the Garmin buying card below.

Pick based on what you need the watch to do. For marathon training and digging into your data, the 965 gets our recommendation. For iPhone users who want calls, messages, apps, and outdoor features in one watch, the Ultra 3 wins. Just don't expect either watch's smartwatch battery rating to mean it'll record your entire ultramarathon.

Garmin Forerunner

This link is for the Forerunner 165 in Black, the entry-level running watch covered here. Its features are different from the 965 in the main specs table.

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Apple Watch Ultra

This link is for the Ultra 3 with a Black Titanium case and Black Titanium Milanese Loop in Large. The band you choose affects both fit and the total weight of the watch.

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Garmin Forerunner vs Apple Watch Ultra: Specs Comparison

These specs compare the Forerunner 965 with the Ultra 3, since not every Forerunner is the same. Keep in mind that each brand tests battery life differently, and the weights below are measured in different ways.

Design & Build Quality

Garmin uses a round face, a touchscreen, and physical buttons on both the 165 and 965. Both come with silicone straps, and the 965 adds a titanium bezel. Apple goes a different way, with a rectangular 49mm titanium case, a Digital Crown, a side button, and a customizable Action button.

Comparing weight takes more than simple subtraction. Garmin lists the 965 at 53 grams, while Apple's figures are for the case alone, before you add a band. The linked Ultra 3 also comes with a Milanese Loop, which makes it a different package from one with a fabric band.

When you're choosing a running watch, weight and fit deserve as much attention as the feature list. Check the case size and strap sizing before deciding which one you'll wear through training and sleep.

Apple builds the Ultra 3's case from Grade 5 titanium, and on published figures it's the heavier of the two once you add a band. Apple also supports water sports and recreational diving on the Ultra 3. Its 100m water-resistance rating doesn't make it a scuba watch for dives that deep, though. Recreational diving support stops at 40m and requires a compatible dive app.

For pool sessions and regular swimming, the Forerunners' 5 ATM rating has you covered. For recreational scuba diving or high-speed water sports, go with the Ultra 3. Don't assume Garmin's running watches can handle diving just because both have water-resistance ratings.

Performance & Key Features

Start with what you want to see during a workout. The 165 and 965 both have AMOLED touchscreens, but the 965 adds built-in color maps and deeper training features. Apple's wide-angle OLED display handles detailed maps, watch faces, and watchOS apps.

Garmin lets you customize your workout data pages, so you can choose which metrics show up, like pace, heart rate zones, and training data. On the 965, navigation and training tools all live in the same sports-focused system.

GPS is another reason to keep the models straight. The 965 and Ultra 3 both support dual-frequency positioning, while the 165 doesn't have multi-band GPS.

Communication is where Apple has the clearest edge. With a supported cellular plan and coverage, the Ultra 3 can handle calls, messages, and music streaming without your iPhone nearby. Its satellite features are a separate option with their own regional limits and requirements, and they don't replace normal cellular calls or streaming.

Music works differently on Garmin. The 965 stores music for offline listening, while the standard 165 linked here only controls music playing on your phone. If you want offline playback, get the separate 165 Music version.

When it comes to battery life, ask yourself two questions: how often will you need to charge, and how long do you need to record a workout? Garmin rates the 965 for up to 23 days in smartwatch mode, but continuous recording drops to up to 31 hours GPS-only or 19 hours with multi-band, without music. Playing stored music cuts those numbers further.

Apple rates the Ultra 3 for up to 42 hours of normal use, or 72 hours in Low Power Mode, under its own mixed-use test conditions. Those figures include time outside of workouts, so comparing them directly with Garmin's continuous-GPS numbers would be misleading. Garmin wins on time between charges, but for a really long race, you'll still need a battery plan based on your recording settings.

Pros & Cons: Garmin Forerunner

Training analysis is the biggest reason to buy the 965. Training Readiness combines your sleep, recovery time, HRV status, recent training load, and stress history into a score you can check before a hard session. Training status and load analysis give you context across your whole training block, not just today's workout.

You don't need a Garmin Connect+ subscription to use these training tools. Add in the 965's maps and longer smartwatch battery life, and it's the better pick for runners who want training and navigation in one place. Physical buttons also give you an alternative to the touchscreen mid-workout.

The catch is that features vary a lot between models. The 165 has recovery time, HRV status, suggested workouts, and up to 11 days in smartwatch mode, but it doesn't have the 965's Training Readiness, training status, load analysis, or full-color maps. Buying an entry-level Forerunner doesn't unlock everything Garmin offers.

Neither of these Forerunners can make calls on its own. Incident Detection and Assistance also need a paired phone with a data connection, which matters if you plan to leave your phone at home. And if you want a large app store on your wrist, Apple's is much bigger.

Pros & Cons: Apple Watch Ultra

Staying connected without your phone is the biggest reason to pick the Ultra 3 over these Forerunners. Calls, replies, streaming, and watchOS apps make it useful between workouts as well as during them. You'll need a supported cellular plan for that, and you still need a compatible iPhone to set it up.

Its outdoor features go well beyond running. You get a siren, Fall Detection, satellite Emergency SOS in supported regions, and recreational diving support. The Action button gives you a physical shortcut, and you can sync offline maps from your iPhone to use when your phone isn't with you.

Charging is the main trade-off compared with the 965. Even with the Ultra's longer battery rating, you'll be charging more often than with Garmin in smartwatch mode. Low Power Mode stretches Apple's rated battery life, but it changes how the watch behaves, so it's not the same as normal use.

Apple also deserves credit for its built-in Training Load feature, which compares your recent workout effort and duration with a longer baseline. You don't need a third-party app just to see training load. Garmin's advantage is the 965's combined readiness and recovery tools, not that Apple has no training analysis at all.

Real Buyer Scenarios

For a marathon training block full of intervals, easy runs, and recovery decisions, get the 965. Its training load, readiness scores, and maps give you more information all in Garmin's system. It's also a good fit for triathletes who want built-in multisport tracking, which the 165 doesn't offer in the same way.

For everyday running on a tighter budget, get the 165. Recovery time, HRV status, suggested workouts, and longer smartwatch battery life than Apple cover the useful basics without paying for everything the 965 offers. It's the sensible Garmin pick if full-color maps and advanced load analysis aren't on your list.

If you're an iPhone user who runs before work and wants to stay reachable without carrying your phone, get the Ultra 3 with a supported cellular plan. Calls and messages are the deciding features here. And with its running metrics and structured workouts, choosing communication doesn't mean giving up serious workout tracking.

For swimming plus recreational diving, go with the Ultra 3. For running with an Android phone, go with a Forerunner. For an ultra-distance event, start with the 965's training tools, but work out how much GPS recording time you'll need before committing. Weeks of smartwatch-mode battery won't tell you whether it can record your whole race.

Alternatives Worth Considering

If you want a bigger outdoor watch with maps and Garmin's training tools, look at a Garmin Fenix 8 with a titanium bezel. Check the exact size and display version, though, because materials and battery life vary between them. If you use Android and want a rugged smartwatch with communication features, Samsung's Galaxy Watch Ultra (2025) is worth a look.

The Forerunner 165 is still the budget running pick if you can live without the 965's advanced training and mapping tools. Apple's Series 10 is a thinner everyday option with fast charging, as long as you don't need the Ultra 3's diving and satellite features.

Final Verdict

For anyone weighing the Garmin Forerunner vs Apple Watch Ultra, each use case has a clear winner. Get the 965 for marathon or triathlon training, built-in readiness and recovery analysis, color maps, and less frequent charging. Get the 165 if you want a cheaper running watch with recovery basics and can accept fewer features.

Get the Ultra 3 if you use an iPhone and want to stay connected, make calls without your phone (with a supported plan), and dive recreationally. Its built-in Training Load keeps it relevant for athletes, but Garmin's 965 is still the stronger pick for an all-in-one training setup. If you use Android, choose Garmin.

Put your deciding feature first. If tomorrow's training session matters most, buy the 965. If staying reachable from your wrist matters most, buy the Ultra 3. For long events, match your GPS recording mode to how long you expect to be out before trusting either watch's headline battery claim.