Garmin Forerunner 645 released, price and features

The Garmin Forerunner 645 has been released today. The forerunner 645 comes with a music and none music option. Garmin is certainly one of the leaders in fitness wearables and sports watches, but one of the missing features that users hoped would come with the Vivoactive 3 is music storage and finally, the prayers have been answered in the form of the Garmin Forerunner 645 music. 

Garmin Forerunner 645 available now for order

Garmin Forerunner release

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Garmin Forerunner 645 key details

• What is it? Its the Garmin Forerunner 645 with music storage and also available in a non-music version

• When is it out? The Garmin Forerunner 645 music is available now

• What will it cost? The Garmin Forerunner 645 price starts at $399/£349 without music and with music, it’s $449/£399

Forerunner 645 in pictures

Quick breakdown of the Forerunner 645

  • All day activity tracking
  • GPS/GLONASS enabled with Bluetooth, ANT+, WiFi
  • Barometric altimeter, compass, gyroscope, accelerometer, thermometer
  • Sunlight-visible, transflective memory-in-pixel (MIP) Chroma display 240x240px
  • Physical size: 42.5 x 42.5 x 13.5 mm, 42.5g
  • The Forerunner 645 will come in a music and non-music version
  • 4gb of music storage
  • Syncs music from iHeartradio with a 30-day free trial.
  • Garmin Pay enabled
  • Advanced running dynamics with compatible HR strap or Running Dynamics Pod
  • Wrist-based HR measurements
  • Battery life up to 7 days in smartwatch mode; 5 hours in GPS mode with music
  • Tracks pool swim distance, pace, stroke count and more, but no open water swimming mode and will not work with Garmin’s HR tri to download HR data post swimming.
  • Does not support multi-sport profiles, so a no for triathletes
  • It supports cycling, but it does not feature power meter support
  • No golf features
  • Monitors Training status, anaerobic training effect, and training load t
  • Connect IQ compatible
  • Receive and even respond to text messages when connected to compatible smartphones (Android only)
  • Water resistant to 5 ATM

So that is the quick rundown of the forerunner 645 music, now read on for more details on the key features.

Must read review: Samsung Gear sport hands on

Garmin Forerunner 645 design

The FR645 sports the same design as the Vivoactive 3, The Forerunner running watch weigh’s in at 42g with a stainless steel bezel and 20mm quick release silicone watch bands. The Forerunner 645 does not feature a touchscreen but instead feature physical buttons to navigate the watch. Garmin has also made the Forerunner 645 waterproof to 5ATM, but interesting it does not have an open water swimming profile


Garmin Forerunner 645 workoutIn terms of the screen specs, it seems we can expect a 1.2-inch, 240 x 240 display, There’ll also be a heart rate monitor on board with built-in GPS/GLONASS to track your activities.

Garmin have released the Forerunner 645 in back and Sandstone for the non-music versions and black and Cerise for the music enabled versions

Garmin Forerunner 645 features

Garmin did a very good job of leaking the features of the FR645 and below I will give you a break down of the key features and observations

Garmin music storage

The Garmin Forerunner 645 will be released in two versions; one with music support and without.

The 645 Music will let you store 800 songs and will let you pair Bluetooth headphones like you can on the Fitbit Ionic. Garmin has partnered with Skullcandy to bring Bluetooth headphones and if you buy a Forerunner 645 you get 50% off Method Wireless by Skullcandy. The Forerunner 645 music has the ability to stream music and store music for offline playback from a streaming service iheartradio, but it will not include Spotify and this may be due to the fact Samsung has an exclusive deal with Spotify at present

Garmin Forerunner 645 music


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Forerunner 645 sports tracking

The Garmin FR645 will track a variety of sports, but its main aim is run track. It also feature’s Advanced running dynamics with compatible HR strap or Running Dynamics Pod and features a wrist-based heart rate monitor, which is the 2017 optical HR featured in the Fenix 5 and Vivoactive 3.

Garmin Forerunner 645 running

Forerunner 645 music is also waterproof to 5ATM like other Garmin fitness wearables and will support pool swimming One thing to note is that the Forerunner 645 will not support Open water swimming profile on the specs sheet and this would be a miss for triathletes wanting to use the Forerunner 645. Speaking of try mode, it does not feature a multi-sport mode, so its a no for triathletes. The Forerunner 645 will not support Garmin’s HR-Tri chest strap for downloading of HR data post a swimming workout.

Garmin has also enabled the Forerunner 645 to feature Garmin’s new cardio and strength tracking along with other activities like Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing and Yoga. Along with the sports tracking the Forerunner 645 also features step tracking, floors climbed, activity minutes and all the usual Garmin all day tracking stats.

One of other missing features I spotted was power meter support for cycling on the Forerunner 645. According to the specs sheet, the 645 music didn’t support the Garmin Vector power meter nor third-party power meters.

Garmin Pay on the Forerunner 645

Garmin has also included the wrist-based contactless payments service Garmin Pay on the Forerunner 645. However, as it currently stands Garmin Pay has got off to a slow start with the Vivoactive 3 with a very limited launch. So let’s see how much traction Garmin make with the payment service, but adding to additional wearables is a step in the right direction.

Garmin Forerunner 645 garmin pay

Garmin Forerunner 645 music smart features

The Forerunner 645 music also include’s smart features like current Garmin devices, including Connect IQ support, the ability to respond to notifications and control music playback. I am not personally a fan of smart features on a fitness watch, but that is just down to personal preference.

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Garmin Forerunner 645 availability

The Garmin Forerunner 645 is available now for preorder, but according to Garmin’s own site and other retailers people may be in a long wait with up to 8 weeks for delivery

Essential reading: Garmin Vivosport review

Garmin Forerunner 645 price

The Forerunner 645 is priced at $449/£399 for the non-music version and the Forerunner with 645 with music is priced at$449/£399.

Garmin Forerunner 645 cerise


Garmin Forerunner 645 opinion

The Garmin Forerunner 645 I think this will answer a lot of the users of Garmin’s fitness wearables requests for music storage but the choice of streaming services is disappointing. My biggest observation is that the Forerunner 645 based on face value is similar o the Garmin Vivoacive 3, but with music storage and advanced running features and the biggest question will be, is the extra $150/£100 worth paying to get music storage and advanced running features. My personal view is that if you are a serious runner then it won’t be a choice between the Vivoactive vs the 645, but the Forerunner 935 and the forerunner 645 given the small difference in price.

Let me know what you think in the comments below.

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  1. I talked to the Garmin guys at the Dallas Marathon last week. They said that there will be a new Forerunner model in the $400 price point released around CES in Las Vegas in January. He did not give me the model number, but what you found appears to be the one. I am excited to see it and compare it with the FR935.

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Jon Ratcliffe
I have a huge passion for technology having worked in the sector for over 18 years in a variety of roles. I cover Wearables, tech and smart home. My reviews and information will talk about how the product works in reality and not just what the marketing departments want you to think.

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