Garmin Forerunner 255 vs Garmin Forerunner 645

Design:

Garmin Forerunner 255
Design

Garmin Forerunner 255 is a smartwatch with a slim design and a colored display. It features lots of new specifications like heart rate variability and even has the sleep stages and gives users the score of their sleep quality. Garmin Forerunner 255 lens material is made of corning gorilla Glass 3. Similarly, the bezel material is made by using the fiber reinforced polymer and the strap material is made of silicone which is very easy to wear. The Garmin forerunner 255 is available in these pretty colors i.e. Black, Neo tropic, Whitestone, Powder Gray, Slate Gray, and Tidal Blue. Read More

Garmin Forerunner 645
Design

Forerunner 645 is the smartwatch that lets the user run and has a track without feeling the need for their phone on their side. By using this, watch, one will easily run without missing out on any smart features. This watch has all the modern features like responding to your emails, and message and therefore provide all important updates. The lens material of the product is made of corning gorilla glass. Similarly, the strap material is made of silicone and the bezel material is made of highly durable stainless steel. The forerunner 645 is available in these colors i.e. black, cerise color, and sandstone. Read More

Specifications:

1.3"

Screen Size

1.2"

Touch Screen

260 x 260px

Resolution

240 x 240px
49g

Weight

41.8g

Waterproof

Max Temperature

Min Temperature

Replaceable Band

22mm

Band Width

20mm

Screen protection

336

Battery Life

168

Charging Time

Garmin Forerunner 255
Specifications

The Garmin forerunner 255 has many specifications like the screen size of the product is around 1.33 inches and is equipped with sunlight-available transflective memory in pixel display. Also, it has a touch screen and the resolution quality is around 260 x 260 pixels. The weight of this product is around 49g. also, it's water resistant and has a depth rating of up to 5ATM. The maximum operating temperature range of this product is from. the watch band is replaceable and it is well protected by gorilla glass protection. The battery life lasts up to 14 days. Read Full Specs

Garmin Forerunner 645
Specifications

The forerunner 645 has a screen size of 1.2" (30.4 mm) diameter. There is no touchscreen available. The screen resolution of the product is 240 x 240 pixels. The total weight of forerunner 645 is around 41.8g. Also, it’s waterproof and has a depth rating of up to 5 ATM. The maximum operating temperature range is from -20º to 60ºC (from -4º to 140ºF). The watch band is replaceable and therefore one can change it based on their need. Equipped with a gorilla glass version, the battery life last up to 7 days. And with GPS mode it will last up to 14 days. Read Full Specs

Activity Tracking:

GPS Tracking

Route Tracking

Heart Rate Monitoring

Blood Oxygenation

Activity Detection

Distance Tracking

Step Tracking

Elevation Tracking

Bike Ccadence Monitoring

Sleep Tracking

Calories Intake Tracking

Calories Burned Tracking

Weight Tracking

Water Intake Tracking

Body Temperature

Sport Activities Tracking

Garmin Forerunner 255
Activity Tracking:

there are various tracking features that Garmin forerunner 255 holds like the availability of GPS, GLONASS, and GALILEO which helps in precise location tracking. Similarly, there is a route tracker available. The heart rate monitor will help track the blood oxygenation level and will keep the heat rate in check. Also, it detects activities automatically as the distance traveled, the steps taken in a day, and even the elevation crossed by the person. The sleep tracker is available too along with a calorie intake counter which will help users their ideal weight. The multi-sports mode is available which helps a user perform various challenges and activities. Read More

Garmin Forerunner 645
Activity Tracking:

There are various tracking features that the forerunner 645 adheres like the availability of GPS which will track the precise location of the user. Similarly, it is also equipped with a route tracker. There is a heart rate monitor available that will monitor the blood oxygenation levels. It also detects all the activities automatically like the distance traveled, the steps taken in a day, and an elevation crossed. The cadence sensor will calculate the average cadences in a day. The sleep tracker is also present. The weight tracking and calories burnt are also calculated. Lastly, with multi-sports mode available it will let the user perform various challenges. Read More

Compatibility & Connectivity

Android Compatibilty

IOS Compatibilty

Mac OS Compatibility

Syncs Wirelessly

Automatic Syncing

Wi-Fi Module

Cellular Module

Call Control

Sport Activities Tracking

Camera Remote Control

Garmin Forerunner 255
Compatibility & Connectivity

Garmin Forerunner 255 is compatible with any smartphone whether android or iOS. It provides compatibility with Garmin maps as well. One can connect it to other devices wirelessly and it also connects with your smartphone with the help of Bluetooth. Wi-Fi enabling option is also available. It also supports the ANT+ protocol for better connectivity. It also uploads wireless data directly to Garmin Connects online fitness community and other social media sharing through this application. This is done to view workout summaries, create goals, and much more. Provides weather forecast and notifications for calendar reminders too. Read More

Garmin Forerunner 645
Compatibility & Connectivity

Garmin Forerunner 645 is found compatible with both Android and iOS users. It provides compatibility with Garmin maps as well. We can connect it to other devices wirelessly using Bluetooth technology. Moreover, it is also found compatible with Windows or Mac. It also provides inclusive navigation when paired with these compatible devices. It also supports the ANT+ protocol for better connectivity by using low energy. It also uploads wireless data directly to Garmin Connects online fitness community and other social media sharing through this application. This also helps you to see the route you have traveled, and you can view the distance covered and activities summary as well. Read More

Bottom Line

Garmin Forerunner 255 Pros

  • Multiple sizes are available
  • Supports NFC
  • Garmin pay available
  • Heart rate sensor
  • Amazing Triathlon mode
  • A barometric altimeter is available

Garmin Forerunner 645 Pros

  • Lightweight
  • Easy to read
  • Comfortable to carry all-day
  • Physical buttons present
  • Great battery life
  • Advanced running metrics

Garmin Forerunner 255 Cones

  • Five buttons navigation
  • Expensive
  • The real-time stamina feature is unavailable.
  • No touchscreen availability

Garmin Forerunner 645 Cones

  • No touchscreen
  • Glitchy Bluetooth connection
  • The music app is limited
  • Expensive

Design:

Garmin Forerunner 255
Design

Garmin Forerunner 255 is a smartwatch with a slim design and a colored display. It features lots of new specifications like heart rate variability and even has the sleep stages and gives users the score of their sleep quality. Garmin Forerunner 255 lens material is made of corning gorilla Glass 3. Similarly, the bezel material is made by using the fiber reinforced polymer and the strap material is made of silicone which is very easy to wear. The Garmin forerunner 255 is available in these pretty colors i.e. Black, Neo tropic, Whitestone, Powder Gray, Slate Gray, and Tidal Blue. Read More

Garmin Forerunner 645
Design

Forerunner 645 is the smartwatch that lets the user run and has a track without feeling the need for their phone on their side. By using this, watch, one will easily run without missing out on any smart features. This watch has all the modern features like responding to your emails, and message and therefore provide all important updates. The lens material of the product is made of corning gorilla glass. Similarly, the strap material is made of silicone and the bezel material is made of highly durable stainless steel. The forerunner 645 is available in these colors i.e. black, cerise color, and sandstone. Read More

Specifications:

1.3""

Screen Size

1.2""

Touch Screen

260 x 260px

Resolution

240 x 240px
49gg

Weight

41.8gg

Min Temperature

Replaceable Band

22mmmm

Band Width

20mmmm

Max Temperature

Waterproof

Screen protection

336h

Battery Life

168h

Garmin Forerunner 255
Specifications

The Garmin forerunner 255 has many specifications like the screen size of the product is around 1.33 inches and is equipped with sunlight-available transflective memory in pixel display. Also, it has a touch screen and the resolution quality is around 260 x 260 pixels. The weight of this product is around 49g. also, it's water resistant and has a depth rating of up to 5ATM. The maximum operating temperature range of this product is from. the watch band is replaceable and it is well protected by gorilla glass protection. The battery life lasts up to 14 days. Read More

Garmin Forerunner 645
Specifications

The forerunner 645 has a screen size of 1.2" (30.4 mm) diameter. There is no touchscreen available. The screen resolution of the product is 240 x 240 pixels. The total weight of forerunner 645 is around 41.8g. Also, it’s waterproof and has a depth rating of up to 5 ATM. The maximum operating temperature range is from -20º to 60ºC (from -4º to 140ºF). The watch band is replaceable and therefore one can change it based on their need. Equipped with a gorilla glass version, the battery life last up to 7 days. And with GPS mode it will last up to 14 days. Read More

Activity Tracking:

h

Charging Time

h

GPS Tracking

Route Tracking

Heart Rate Monitoring

Blood Oxygenation

Activity Detection

Distance Tracking

Step Tracking

Elevation Tracking

Bike Ccadence Monitoring

Sleep Tracking

Calories Intake Tracking

Calories Burned Tracking

Weight Tracking

Water Intake Tracking

Body Temperature

Sport Activities Tracking

Garmin Forerunner 255
Activity Tracking:

there are various tracking features that Garmin forerunner 255 holds like the availability of GPS, GLONASS, and GALILEO which helps in precise location tracking. Similarly, there is a route tracker available. The heart rate monitor will help track the blood oxygenation level and will keep the heat rate in check. Also, it detects activities automatically as the distance traveled, the steps taken in a day, and even the elevation crossed by the person. The sleep tracker is available too along with a calorie intake counter which will help users their ideal weight. The multi-sports mode is available which helps a user perform various challenges and activities. Read More

Garmin Forerunner 645
Activity Tracking:

There are various tracking features that the forerunner 645 adheres like the availability of GPS which will track the precise location of the user. Similarly, it is also equipped with a route tracker. There is a heart rate monitor available that will monitor the blood oxygenation levels. It also detects all the activities automatically like the distance traveled, the steps taken in a day, and an elevation crossed. The cadence sensor will calculate the average cadences in a day. The sleep tracker is also present. The weight tracking and calories burnt are also calculated. Lastly, with multi-sports mode available it will let the user perform various challenges. Read More

Compatibility & Connectivity

Android Compatibilty

Mac OS Compatibility

Syncs Wirelessly

Automatic Syncing

Wi-Fi Module

Cellular Module

Call Control

Sport Activities Tracking

Garmin Forerunner 255
Compatibility & Connectivity

Garmin Forerunner 255 is compatible with any smartphone whether android or iOS. It provides compatibility with Garmin maps as well. One can connect it to other devices wirelessly and it also connects with your smartphone with the help of Bluetooth. Wi-Fi enabling option is also available. It also supports the ANT+ protocol for better connectivity. It also uploads wireless data directly to Garmin Connects online fitness community and other social media sharing through this application. This is done to view workout summaries, create goals, and much more. Provides weather forecast and notifications for calendar reminders too. Read More

Garmin Forerunner 645
Compatibility & Connectivity

Garmin Forerunner 645 is found compatible with both Android and iOS users. It provides compatibility with Garmin maps as well. We can connect it to other devices wirelessly using Bluetooth technology. Moreover, it is also found compatible with Windows or Mac. It also provides inclusive navigation when paired with these compatible devices. It also supports the ANT+ protocol for better connectivity by using low energy. It also uploads wireless data directly to Garmin Connects online fitness community and other social media sharing through this application. This also helps you to see the route you have traveled, and you can view the distance covered and activities summary as well. Read More

Bottom Line

Garmin Forerunner 255 Pros

  • Multiple sizes are available
  • Supports NFC
  • Garmin pay available
  • Heart rate sensor
  • Amazing Triathlon mode
  • A barometric altimeter is available

Garmin Forerunner 645 Pros

  • Lightweight
  • Easy to read
  • Comfortable to carry all-day
  • Physical buttons present
  • Great battery life
  • Advanced running metrics

Garmin Forerunner 255 Cones

  • Five buttons navigation
  • Expensive
  • The real-time stamina feature is unavailable.
  • No touchscreen availability

Garmin Forerunner 645 Cones

  • No touchscreen
  • Glitchy Bluetooth connection
  • The music app is limited
  • Expensive