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Garmin Forerunner 645 vs Garmin Vivoactive 4

Garmin Forerunner 645 Fitness Watch
Garmin Forerunner 645
Garmin Vivoactive 4 Fitness Watch
Garmin Vivoactive 4
Available colors
Editiorial reviews
10
3.8 out of 5
6 user ratings
5 stars
16 %
4 stars
50 %
3 stars
33 %
2 stars
0 %
1 stars
0 %
Read editorial reviews
13
4.4 out of 5
8 user ratings
5 stars
62 %
4 stars
37 %
3 stars
0 %
2 stars
0 %
1 stars
0 %
Read editorial reviews
User rating
53
4.0 out of 5
53 user ratings
5 stars
35 %
4 stars
37 %
3 stars
15 %
2 stars
9 %
1 stars
1 %
193
3.5 out of 5
193 user ratings
5 stars
19 %
4 stars
26 %
3 stars
37 %
2 stars
11 %
1 stars
4 %

Full Comparison

Display

Garmin Forerunner 645Garmin Forerunner 645
Garmin Vivoactive 4Garmin Vivoactive 4
Screen resolution240 x 240 px260 x 260 px
Touchscreennoyes
Colour screenyesyes

Dimensions

Garmin Forerunner 645Garmin Forerunner 645
Garmin Vivoactive 4Garmin Vivoactive 4
Width1.67 in1.78 in
Depth1.67 in1.78 in
Weight1.47 oz1.78 oz

Design

Garmin Forerunner 645Garmin Forerunner 645
Garmin Vivoactive 4Garmin Vivoactive 4
Colour of product
  • Beige
  • Black,Stainless steel
  • Grey
  • Purple
  • Black
  • Black,Grey
  • Grey,Silver
  • Silver
Band materialSiliconeSilicone
Protection featuresWater resistantWaterproof
Waterproof depth55

Features

Garmin Forerunner 645Garmin Forerunner 645
Garmin Vivoactive 4Garmin Vivoactive 4
Heart Rate MonitorBuilt-inBuilt-in
Distance meteryesyes
Calorie counteryesyes
Alarmyesyes
Compassyesyes
Stopwatchyesyes
Temperature sensoryesyes
Timeryesyes

Connectivity

Garmin Forerunner 645Garmin Forerunner 645
Garmin Vivoactive 4Garmin Vivoactive 4
Bluetoothyesyes
GLONASSyesyes
GPSyesyes

Power

Garmin Forerunner 645Garmin Forerunner 645
Garmin Vivoactive 4Garmin Vivoactive 4
Battery typeBuilt-inBuilt-in
Battery life (standby mode)7.0 day8.0 day

Pros & Cons

Pros
      Cons

          Often compared with Garmin Forerunner 645

          Often compared with Garmin Vivoactive 4