Garmin

Forerunner 645 Music

Garmin Forerunner 645 Music

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Overall

#132 in

Fitness Trackers

according to Reddit Icon Reddit

Sentiment score69% positive
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Top Pros

Top Cons

Last updated: Jun 26, 2026

Reddit Reviews

Reddit Iconblr1g
7 months ago

I've had both, and hands down I would pick MIP all day. I run outdoors in the day. MIP is the best for that. Even at night, the backlight works perfectly fine for me. I'm still using a 645M with a small 41mm display, and even with my not so good eyesight, I have no problems reading the display. The day Garmin goes all in on OLED, is the day I start looking at smart watches instead.

Reddit Iconlittle_buddy82
7 months ago

One of the issues i have with the Amoled display is that I can't seem to be able to use barcode reader to scan barcodes on the watch. With previous forerunner 645M, I had multiple barcode saved on the watch with barcode app. One of them was gym pass, and I had other ones for other specific rewards card. (I hate taking phone out all the time or bringing it sometimes when walking to the gym). Now that I upgraded to an Amoled screen, I can't seem to be able to use barcodes anymore. Not sure if anybody else can comment on this ? Other than that, sometimes the flick of the wrist isn't convenient to look at the time, but you get used to it

Reddit Iconseamusmcnamus
7 months ago

I had the garmin forerunner 645 music for 5 years and it was bullet proof! It has spotify on the watch. You can still pick them up for 200 quid.

7 months ago

Sorry €299 I seen it for, I misread. I have seen them for €200 on sale. https://www.mgaffaires.com/gb/montres-cardiofrequencemetre/1078-montre-forerunner-645645-music-garmin.html?srsltid=AfmBOorQUDF5sHKSW6WxgRCUBEEe1IgKhvBEjDxQLv5YgNy2-hp0dIylbEs

Reddit Iconshadrach103
11 months ago

Got mine when it was on sale for the same price as the 255. Better than my old 645 Music in every way and the AMOLED screen was a quick, minor adjustment for me.

9 months ago

Love my 265S and I don't feel like I'm missing anything that the more expensive models offer. I no longer use the third-party arm band that I paired with my old FR 645 as the HRS in the 265 is so much better than the 645 was. GPS tracking is great and initial sync-up only takes a few seconds. I honestly ignore most of the training/recovery crap in the watch as I find it pretty useless. I thought I might not like the AMOLED after using a MIPS watch for years but it I find the AMOLED is great once you get used to the brief wake-up delay.

Reddit IconTooMuchTaurine
10 months ago

Had my Garmin 645 music for maybe 7 years.  Replaced under warranty at year 3, still going strong..  I'll get 10+ out of it I think.

Reddit IconCorbixz
9 months ago

How quickly does it charge? I've gotten used to popping my Garmin (FR645, FR945, Fenix 7s, then Fenix 7s Pro) on the charger for 10min or so while I shower and that is enough that I never have to worry about the battery. Think the same would be true of the Venu 4?

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