Garmin - Forerunner 645 Music
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Reddit Reviews:
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Last updated: Dec 15, 2025 Scoring
Liked most:
98
6
"they were so much more comfortable I struggle to even put my Maxwells back on."
"open back is the only way since gaming you get so freaking hot you need the ventilation."
"Thanks to its plastic-plus-aluminum construction, the Dufu is incredibly light. ... Once you find the right set of ear tips, it practically vanishes on your ears without any sense of foreignness or sagging, ensuring excellent comfort even during extended listening sessions."
300
22
"the battery lasts 2 weeks, that's with 5 days worth of tracking runs and day to day use. Incredible."
"16 days battery life on my fenix. ... The other aspect I really appreciate about my fenix is the battery life. 16 days or so. With everything I have to change these days (laptops, mice, keyboards, headphones, watches, phones), I appreciate not having to worry about it too often."
"Oh, and the battery lasts days even when exercising a lot (weeks without excercise)."
12
1
"If you listen to music the Garmin 245 MUSIC is awesome. ... you can download your music apps to the watch so you don't have to carry your phone."
"I have a 245 music and it is a game changer. So easy to grab watch, shoes, headphones and go."
"I can use Spotify in the Garmin and it hasn't glitched on me once."
44
1
"a recent update even added Strength training to the Garmin Coach feature. It used to just be running plans. ... But aside from that you can make your own strength training workouts. ... I personally really enjoy the ability to make my own workouts and fill out the calendar in the app to have a custom training plan that I know works for me."
"the load tracking and suggested workout feature alone is worth it. ... The battery of data signals you get to tailor and improve your training is worth the switch alone"
"it has a lot of additional activity features I like (e.g. tracking outdoor swimming, biking , training plans etc)"
8
0
"with all the GPS accuracy you can get"
"The forerunner will meet and exceed all your needs except one."
"I decided on one of the lower-end Garmin's for their strong GPS"
Disliked most:
3
25
"It's the same nozzle size, but it's also heavier than the red, so it's more prone to falling out of your ears. ... I returned both the red and the mp145 even though they both fit me (to an extent). ... Dont even try the 145 if the red's don't fit."
"They're bulky and heavy"
"I find it heavy, bulky and the wire doesn't curve over my ear well"
25
76
"wtf no time settings in a watch?"
"google's software features and fit-and-finish is lacking for their watch ... there is no option on a pixel watch to just automatically turn on the screen when a notification comes in to view the notification; you have to manually interact with it by either tapping the screen within a few seconds or lift-to-wake the watch, which is very unreliable ... that actually was a dealbreaker for me"
"it does not show new notifications as they come in without some sort of manual action ... unless you tap the screen or lift your wrist when you get the vibration, you don't get to see anything ... 75% of the time my pw2 wouldn't recognize a wrist-raise gesture, so I'd miss whatever the new notification was"
0
6
"I used to find that wrist HR sucked for rowing"
"In terms of the fitness stuff, I find that the heart rate monitoring doesn't work great for weightlifting, especially when you're holding on tight. ... I ended up getting a heart rate monitor strap to wear across my chest for workouts."
"I tested my Forerunner 235 against a strap whilst on my turbo trainer, the watch was way off, what my Edge 1030/strap were showing. ... The watch was recording an activity as well."
0
4
"the screen is nowhere near as responsive as the AW."
"I missed it's nice and polished apps"
"Garmin connect has bad UI"
1
8
"when I’d swim in pools it would so often double count my lengths…"
"Annoys me that theres no golf activity on the forerunner"
"Garmin only adds load when you are tracking an activity, so it can miss a lot if it's not a planned workout."
The same I was big on the Apple ecosystem and felt like it was a cool watch just because it integrated so well, but I never even downloaded any apps for it. All I ever used it for was timers and reminders and stuff like that and basic fitness tracking, and my forerunner does all the same stuffbut way better. Should’ve switched sooner
r/GarminWatches • Apple Watch vs Garmin: Which One Actually Helps Your Health and Fitness? ->There is Garmin Swim (IMHO essentially it is a ForeRunner, but swim has been put in focus; review here https://www.dcrainmaker.com/2019/10/garmin-openwater-review.html). However, modern Garmin watches are all able to track pool swim as well as gym workouts (you might have to set exercises later in the app if you want to track muscle groups affected). Essentially ForeRunner is for runners mostly, Forerunner 9xx is focused on triathlon, Fenix is mostly for outdoors - but again, all of them can do almost the same. I’d go with Fenix if budget allows.
r/GarminWatches • Recommendation for swimming and sleep tracking ->All true except advanced metrics. They are also present in Fenix (it has even more features for hiking) and Instinct. Forerunner is not more advanced. The rugedness is mostly about the bezel. In fenix and instinct it has a rim which gives extra protection to the screen. But that means rugged watches are more bulky what can be a problem in the gym. The real question is lightness of forerunner vs battery life of fenix /instinct
r/GarminWatches • Too many watch models ->I have a fenix 8 and previously forerunner 645 and in both I have the smart part turned off. I don’t like reading or seeing or being notified in my watch. So you just turn it off
r/GarminWatches • Fitness watch with ZERO notifications (no texts, calls, emails) strictly fitness ->I’ve had and loved garmin forerunners and a coros pace. Slight preference for coros over garmin for battery life. Slight preference for garmin for multi-app interoperability. I’m actually planning to buy an Apple Watch because it’s fine as a fitness tracker and has better health tracking capabilities on top of the fitness stuff.
r/XXRunning • What fitness tracking watch do you use? ->Depends on what you need, if it’s mainly for running, I’d go with one of the cheaper Forerunner models. An AMOLED display is a nice upgrade though. Also, definitely check the battery life if that’s important to you. I recently switched to the 965 and can say it’s been a solid watch.
r/runninglifestyle • garmin watch recommendations? ->I have both and just got the forerunner. I really enjoy the fitness data from garmin. AW is just a superior smart watch and I am coming to the conclusion that I don’t need it any more. At my age I just need to focus more on my health and fitness.
r/GarminWatches • Apple Watch vs Garmin: Which One Actually Helps Your Health and Fitness? ->I've gotten a lot more consistent with my running with my Garmin forerunner. Week long battery life, and basic notifications. I don't think there exists any watch that tracks lifting correctly though.
r/fitness30plus • What's the best smartwatch for android currently? Has it really motivated you? ->Not having a screen doesn't really seem like much of a selling point. It's nice to have the watch function and access to other data bits on the screen. I have an older Garmin Forerunner that I've used for about 8 years.
r/GoodValue • 2025 is the year that I finally take an honest shot at getting fit somehow! I'm looking for a good fitness tracker to buy (watch, band, ring, whatever). Help me out? ->I would personally always take a Forerunner over the Venu series, as I am pretty serious about my fitness. I don't really care much about smart watch features, just need a bare minimum. And the venu series seems to take tradeoffs with fitness features to accommodate the increase in smart features.
r/GarminWatches • Help me decide between venu 3 and forerunner 265! ->Running is just what the Forerunner targets to be the best choice for. It is a lighter watch, with all the GPS accuracy you can get. It doesn't focus on Golf or diving or being "rugged". So yes, a Forerunner would still be a great option for your situation, and it will just be a plus if you ever decide to run.
r/GarminWatches • Forerunner for Non-Runner ->I would recommend the Forerunner series, I love it. Great for running, and a recent update even added Strength training to the Garmin Coach feature. It used to just be running plans. But aside from that you can make your own strength training workouts. I personally really enjoy the ability to make my own workouts and fill out the calendar in the app to have a custom training plan that I know works for me. But I believe the custom workouts/planning aspect should be universal to most watches though.
r/Garmin • Recommendations for Running/Weight Training Garmin Watch - not sure which model to get ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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