Garmin Forerunner 945 Review
Compare prices at 3 resellers Pros: Lightweight and thin profile, intuitive, fully featured, very accurate
Cons: Expensive, hidden features that take time to set-up and get to know, blood oxygen sensor has questionable accuracy
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Garmin Forerunner 945
|Price||$589.99 at Amazon|
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|Pros||Lightweight and thin profile, intuitive, fully featured, very accurate||Stellar battery life, nice size and weight, comfortable, easy to use, simple software platform, seamless syncing and updates, touchscreen||Amazing features, excellent storage, easy to use, very durable design, excellent integrations, accurate, fantastic battery life||Low profile design, great battery life, very accurate, low cost||Solar rechargeable, good feature set, all functionality is built into the watch without the need for the apps|
|Cons||Expensive, hidden features that take time to set-up and get to know, blood oxygen sensor has questionable accuracy||Larger knob is easy to push accidentally, can't be plugged into a computer||Heavy and bulky, expensive||No mountain sports or navigational features||Buttons are easy to push accidentally, can't use a screen protector, small screen, can't modularize the features like other Garmin products|
|Bottom Line||This elite watch stands out for its high-end features with exceptional accuracy and performance in a low profile design||With all the right features and monstrous battery life, this watch is one of our favorites for ultradistance events and explorations||If you just can't get enough of data, features, and cool integrations, this watch has it all||A fully functional and incredibly light GPS sports watch boasting out of this world battery life||A top recommendation for any adventurer heading out on a longer expedition that needs GPS and a rechargeable device|
|Rating Categories||Garmin Forerunner 945||Coros Apex Pro||Garmin Fenix 6 Pro||Coros Pace 2||Garmin Instinct Solar|
|Battery Life (20%)|
|Ease Of Use (20%)|
|Specs||Garmin Forerunner 945||Coros Apex Pro||Garmin Fenix 6 Pro||Coros Pace 2||Garmin Instinct Solar|
|Watch Face Material||Corning Gorilla Glass DX||Sapphire glass||Corning Gorilla Glass DX or sapphire crystal||Corning glass||Power glass with photovoltaic panels built-in|
|Bezel||Fiber-reinforced polymer||Titanium Alloy||Stainless steel or diamond-like carbon coated steel||Fiber reinforced polymer||Fiber-reinforced polymer|
|Case||Fiber-reinforced polymer||Alumnium||Fiber-reinforced polymer with metal rear cover||Fiber reinforced polymer||Fiber-reinforced polymer|
|Strap Material||Silicon||Silicon or nylon||Silicone, leather, titanium or nylon||Silicon or nylon||Silicone|
|Tools Required to Change Band?||Yes||No||Yes||No||Yes|
|Size Tested||One size only||47mm||47mm||One size only||One size only|
|Measured Main Body Size (diameter or W x H)||46mm||47mm||47mm||43mm||46mm|
|Measured Screen Width||30mm||33mm||33mm||32mm||22mm|
|Measured Weight||1.7 oz||2.0 oz||2.8 oz||1.2 oz||1.9 oz|
|Measured Charging Time||75 min||80 min||110 min||80 min||140 min|
|Battery Type||Rechargable lithium ion||Rechargable lithium ion||Rechargable lithium ion||Rechargable lithium ion||Rechargable lithium ion|
|Measured Battery Life With GPS On||28 hours||36 hours||31 hours||29 hours||29 hours|
|Manufacturer-Reported Battery Life||Smartwatch mode: Up to 14 days
GPS mode w/ music: 10 hours
GPS without music: 36 hours
|Smartwatch mode: 30 days
GPS mode: 40 hours
UltraMax mode: 100 hours
|Smartwatch mode: up to 14 days
Battery-saver watch mode: up to 48 days
GPS mode: up to 36 hours
GPS mode w/ music: up to 10 hours
Max battery GPS mode: up to 72 hours
Expedition GPS activity: up to 28 days
|Smartwatch mode: 20 days
GPS mode: 30 hours
Ultramax mode: 60 hours
|Smartwatch: up to 24 days/54 days with solar*
Battery-saver watch mode: up to 56 days/unlimited with solar*
GPS mode: up to 30 hours/38 hours with solar**
Max battery GPS mode: up to 70 hours/145 hours with solar**
Expedition GPS activity: up to 28 days/68 days with solar*
*Solar charging, assuming all-day wear with 3 hours per day outside in 50,000 lux conditions
**Solar charging, assuming use in 50,000 lux conditions
|Navigation Built In?||Yes||Yes||Yes||No||Yes|
|Satellite Networks Used||GPS, GLONASS, GALILEO||GPS, QZSS, GLONASS, BEIDOU||GPS, GLONASS, GALILEO||GPS, QZSS, GLONASS, BEIDOU||GPS, GLONASS, GALILEO|
|Maps?||Yes, detailed||Yes - basic||Yes - detailed||No||Yes - basic|
|Back to Start Navigation?||Yes||Yes||Yes||No||Yes|
|Water Resistance (max depth)||50m||100m||100m||50m||100m|
|Music Storage?||Yes - 1000 songs||No||Yes - 2000 songs||No||No|
|Daily Fitness Tracking?||Yes||Yes||Yes||Yes||Yes|
|Main Software App||Garmin Connect, widgets for other features||Coros App||Garmin Connect, widgets for other features||Coros||Garmin Connect, widgets for other features|
|Can Software Cross Over to Different Software Ecosystems?||Yes||Yes||Yes||Yes||Yes|
Our Analysis and Test Results
The Garmin Forerunner 945 stands on the highest podium in the GPS watch world. The low-profile design contains hundreds of feature options and is one that is unique on the market. It touts great battery life suitable for some ultra distances and has every feature you could hope for including preloaded detailed maps, navigation, and a ton of activity profiles. This is an elite performance watch for any athlete working towards their next goal.
Features, features, features — this watch is all about them. If you're a total nerd when it comes to data, then this might be for you. It comes fully loaded with everything you'd want in a fully-featured GPS watch, including access to Garmin's robust ecosystem of app integrations, challenges, downloadable workouts, and more. GPS tracking, full navigational capabilities, layered and preloaded maps, course creation, Garmin Pay, downloadable music, you name it, it's got it. While the Garmin Fenix 6 Pro still has just a few more features and storage, the Forerunner 945 is built for any athlete and will perform all necessary functionality. Plus, the software easily syncs and integrates with other popular software platforms like Strava. It earns a high score in this metric for the number of features it touts, and we are still discovering.
- GPS tracking
- Complex activity profiles for gym and fitness equipment, workouts, training plans, running, golfing, cycling, and swimming
- Fitness tracking (steps, calories burned, stairs climbed)
- Fitness monitoring (respiration rate, abnormal heart rate alerts, stress levels, hydration, women's health and menstrual cycling)
- Safety tracking (live track)
- Blood oxygen saturation monitoring (all-day)
- Advanced sleep metrics
- Smartphone notifications
- Live tracking capabilities (both iPhone and Android)
- Contactless Garmin Pay
- Store and play up to 1000 songs (4GB available)
- Heart rate tracking
- Downloadable workouts
- Weekly logs on the menu
- Navigational features (downloaded points of interest, layered maps, courses, sight n' go, coordinates, map use)
- Barometric altimeter
- VO2 max & 5K estimate
- Training status
- 50 meters of water resistance
- Access to Garmin connect ecosystem
- Widget and app integration
- Great storage (16GB of maps, 200 hours of activity data)
- I'm sure we missed something…
Check out all the tech specs at the Garmin website since we can't list them all here.
Wowzers. If you're an ultra-athlete, this watch packs in the GPS battery life. Garmin claims for best-case scenarios, smartwatch mode will last 2 weeks, regular GPS battery (with smartwatch mode) lasts 36 hours without music, and 10 hours with music. We measured charging time to be only 75 minutes. With these metrics in mind, the measured amount of battery life is a little lower than these claims - especially with use over time.
For regular use (which for us included 3 to 4 activities per week), we got a battery life of 1.5 weeks. On the weeks where we had long runs, we got just over a week before needing a charge. In comparison to the rest of the watches on the market, this is okay but not exceptional like we've seen in other watches boasting incredible everyday battery life.
For GPS battery life, we tested the 945 while running a 100-mile mountain race, a 50K ultramarathon, and while it sat outdoors without having to track. During all of our tests, we kept all the settings as they came out of the package. We didn't turn off notifications or change anything from the factory settings, as most folks will probably do. When testing just under the open sky, without movement, the battery lasted an astounding 46 hours with a full GPS signal. We realize that this is the "best-case scenario test" and isn't what you should expect for an actual activity with a variable satellite signal. Still, this was one of the longest in our lineup.
During our 50K run, we started with the battery at 75% full. After running for just under 6 hours through variable cover, including into canyons, we had 55% left. This means 20% was drained over 6ish hours, working out to 3.3% per hour. If battery draining is a linear relationship (which, based on the battery graphs we've looked at, it seems to be), that puts us at 24 hours for GPS life. To test further, we handed this out to a friend running a 100-mile race. The battery started out fully charged and ended with an 8% charge, after running the race in about 27 hours. That last percentage drained quickly at the end. Thus, we can say, based on our test, you'll get between 24 to 28 hours of GPS battery life while in motion. We are sure you could get a little more if you turn off sensors and/or notifications.
Ease of Use
The ease of use on this watch is good, but if you need to dig into the features, it takes a little time to figure out how to use everything. The watch itself has a very nice and high-quality design and display. There are five very responsive buttons, three on the left and two on the right. The display has a resolution of 240x240 pixels, making it very crisp. You can change out watch faces using the Garmin IQ app, which gives you access to literally hundreds of options. The menu choices are extensive, with the ability to add or take away options and optimize as you wish. This all takes a little time to figure out, and for those that aren't completely gear savvy, you might have to look up a tutorial. For ease of use, it earns high marks because while it takes some time to learn the features, the design is intuitive.
To start an activity, go to the time screen and touch the start/stop button on the top right. Here, there is a list of the top favorite activities (that you can choose to set the first time you use them), and you hit begin. If you have had a previous activity, it will automatically offer you a workout option that you can choose to use or dismiss. If you haven't done that activity in a while, it will go to the start screen. A sliding bar that goes from red to green shows the satellite's strength. You can wait for the bar to get green or just start without waiting (typically less than 20 seconds up to one minute, depending on location). When running an activity, depending on the profile, you will have access to several screens, which might seem like a bit much for some folks. For trail running, for example, this includes; distance, timer, pace, total ascent, vertical speed, lap distance/time/pace, heart rate and relative zone that you're currently in, and a well-featured map.
You can optimize what shows up for any profile by pushing up before you start the activity. This will allow you to change the data screens, add a metronome, choose a route, workout, course, etc. The options seem endless. With all these options, the features seem overwhelming but exciting at the same time. Overall, to get activity going and started, it's pretty easy. Though, for a regular person who doesn't have hours to devote to figuring out all the features, ease of use isn't as simple as other watches.
Furthermore, the Garmin Connect software platform uses several different apps, including Garmin IQ and all the options that integrate with it at the Garmin Store. Ease of use for all of that isn't as easy as a simple platform that is only focused on your fitness metrics. That said, for the breadth of information, data, and options that Garmin offers, they do an exceptional job at keeping the watch itself intuitive without inundating you with options. There's just a lot of hidden features that are a treat when you find them.
This device has a host of sensors that offer great accuracy. While GPS accuracy is trustworthy, the heart rate and blood oxygen sensors could still use a bit of work — however, they are just as good as most optical sensors currently on the market.
GPS accuracy proved to be excellent, with a 99.89% accuracy most of the time. On a known bicycle route of 10.8 miles, the Forerunner 945 registered back 10.75 miles with an accurate elevation profile. During our 50K run, 30.42 miles were logged, which was almost exactly correct. During the 100 mile run, the numbers were almost exactly the same as the course-stated mileage. We compared these logs with other watches at the race, which all reflected similar results. Never during any of our activities (with over 20 logged on this watch) did we feel that the distances or times were off. On the map, we didn't see deviations more than 5 feet from the trails, even in poor areas of reception.
Heart rate accuracy is also good in the realm of optical heart rate sensors. The sensor on the 945 is raised slightly from the bezel with a good connection on most wrists. It's relatively flat and doesn't press into the skin either. When it flashes green, you know it's measuring heart rate. It had amazing accuracy during our sitting tests with a variation from the actual heart rate of just 0 - 4 beats per minute. While exercising, we always felt the heart rate was pretty on as well. Sometimes, when sweating or if the watch was pressed into our wrist (as when biking), we'd note that heart rate would get lost here and there. Though, when it was picked up again, it was never off by much.
The blood oxygen sensor still needs a bit of work. When we tried to get it to pick up a reading the first time, it took a very long time. When it finally did, it gave us a reading of 93% at 7,000 feet. Another one of our tests at 800 feet got a reading of 93% again. As a result, this isn't a sensor we'd entirely trust yet, especially if we are monitoring our oxygen saturation for health reasons or while acclimating to higher altitudes. That said, we did some breathing exercises and did see our oxygen rise with big inhales (which is as expected) and fall after holding our breath. So the trends are correct, just not the actual numbers.
The design is one of the biggest pluses of this watch. There are very few high-end GPS watches that pack in hundreds of features in such a flat and low-profile finish. Many others are chunky and heavy, but the Forerunner 945 is the opposite. It earns top marks in this category for its low weight and slim profile.
We appreciate this watch's dimensions. The watch face is medium size (46mm body) with a slim profile (13mm) and a screen large enough to see all your data on the go (30mm). These are our measured metrics, which are similar to the manufacturer's claims. The buttons are large enough and well-spaced to use with a pair of gloves if needed.
This watch does not have a touch screen. The screen is crisp and easy to see, with all the right data presented as you need it. Any activity profile can be optimized to show you exactly what you want. The font is very large, and you can change the look using the Garmin IQ app. The glass is an upgrade from the Forerunner 345, which is a scratch-resistant Corning Gorilla Glass DX. The band is made of a polymer that is also resistant to scratches. After using it for months, it still looks new.
We like the silicone band, which is an ideal length with enough eyelets to facilitate a fit for smaller wrists. The only caveat of the band is that tools are required to change it out. Many other options have a quick release, but for this one, you need a mini screwdriver, which isn't very convenient.
There's no doubt that this watch is expensive. For most recreational athletes, the number of features will likely be extraneous. In fact, even professional athletes don't need this many features. However, if you're a gear junkie that just can't get enough stats and features, this watch may be for you. It's geared to all types of sports, including the ultradistance athlete taking on 100-mile races. If you like the idea of all these features, integration with the Garmin Connect community and apps, and a myriad of features, including contactless payment and music storage, you may see the value.
The Garmin Forerunner 945 is touted as one of the best GPS watches on the market for its exceptional accuracy, battery life, and stacks of features. The price is high, but if you love seeing every stat there, this is the one that comes with our highest recommendation. Flat and thin, it stands out for its excellent design and excellent battery life.
— Amber King