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Garmin Forerunner 25 Review

Garmin Forerunner 25
  • Editor Rating
  • Rated 4.5 stars
£79 to £129
  • 80%

  • Garmin Forerunner 25
  • Reviewed by:
  • Published on:
  • Last modified: 24th May 2018
  • Heart Rate Monitor functions
    Editor: 90%
  • Heart Rate Accuracy
    Editor: 99%
  • Activity Tracking features
    Editor: 80%
  • Running functions
    Editor: 90%
  • Fitness monitoring features
    Editor: 75%
  • Ease of Use
    Editor: 90%
  • Battery Life
    Editor: 95%

The Garmin Forerunner 25  is a simple to use GPS watch for runners with smartphone connectivity (call alerts, email alerts and data upload to Garmin Connect APP). This competent running watch also features 24/7 activity tracking keep tabs on daily steps, calories and distance walked etc. The Garmin Forerunner 25 GPS runners watch has been reviewed by Tristan Haskins aka CardioCritic (formerly HeartRateMonitor UK)

Pictures of the Forerunner 25 showing smart notifications and incoming calls

Release Date (UK) > August 2015

Product it replaced > Garmin Forerunner 210

Suggested Retail Price (when new) > £149

Replaced by > Still a valid product but a better option could be the Forerunner 35 (Oct 2016) with wrist based HR

The Forerunner 25 takes the popular Forerunner 15 and adds Smart Notifications and Bluetooth data download to compatible smartphones (Android and iPhone). It comes in TWO sizes, small and large and with OPTIONAL chest strap heart rate sensor. Just like the F15 before it, the Forerunner 25 includes an built in accelerometer that provides running metrics (pace, distance etc) when running indoors. This same technology is also used 24/7 to give activity tracking feedback.

Confused by How Many Forerunners there are?

You are not alone. If you are thinking of getting a Garmin GPS running then you will be joining a club of thousands. There have been over 15 models in the Forerunner range so we published this guide to the Garmin Forerunner which compares the main differences between all the models from the original Forerunner 101 in 2003 to the latest products.

Highly Effective GPS Running Watch

This compact yet competent running watch has 95% of the features that 95% of runners will probably ever need. The latest technology makes uploading your training history a doddle. At the end of the of the day everything can be manually downloaded to PC / Mac via supplied USB cable or auto-synced to your smartphone via Bluetooth and the Garmin Connect APP.

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Who’s It For

  • Do you run?
  • Would you like to maintain a steady pace when running?
  • Do you own a smartphone and want your GPS running watch to receive incoming smart notifications from your phone? . (let’s you know when someone is calling you when running)
  • Would you like to track your daily activity rate and be reminded when it’s time to move?

If you have answered YES to any 3 of the 5 questions above then the Forerunner 25 is PROBABLY for you. If you answered YES to all 5 questions then what are you waiting for, scroll down for the best prices.

Main Features

  • Tracks distance, pace, heart rate (optional) and calories
  • Instantly share runs and activity tracking progress² with friends, family and the world via social media by pairing a compatible device with Garmin Connect™ Mobile
  • Activity tracking³ counts steps and calories and reminds you when it’s time to move
  • Up to 8 hours of battery life with GPS on or 5 weeks in watch/activity tracking mode(small watch)
  • Up to 10 hours of battery life with GPS on or 10 weeks in watch/activity tracking mode(large watch)
  • Save, plan and share your activities at Garmin Connect™

Note > still a solid performer but a better option could be the Forerunner 35 (Oct 2016) with wrist based HR

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Next Model Up

If you are looking at the next model up then you are probably looking at shifting up from “fun runner” to “competitive runner”. If that’s the case we’d recommend either the Forerunner 230 or Forerunner 235 with off the wrist hear rate technology. However, if you are content with the functionality of this model then you may be pleased to know there is now a Forerunner 35. This newer model has the same functionality as the FR25 with the convenience of wrist based heart rate and a more stylish design.

Next Model Down

The next model down would be the Forerunner 15. The 15 does NOT have any Bluetooth connectivity so no smart notifications and no data download to the Garmin Connect APP.

Closest alternative Running watches?

If you are predominantly a runner looking for a sports watch with Heart Rate & GPS there are some competent alternatives from Polar.

Video Presentation

If you want to improve your running times then you need help getting there. A GPS running watch with proper features designed to make you run at a steadier pace is a way of taking the next step to becoming a better runner. The Garmin Forerunner 25 is an easy-to-use GPS watch that tracks how far, how fast and how long you’ve been running. It has an optional heart rate sensor to monitor your training effort.  This short video from Garmin gives a nice “hands-on” view of this great sports watch. We hope to add our own video review shortly.

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An Alternative GPS Running Watch from Polar ….

If you are considering this Garmin Forerunner watch then we would invite you to read the review of the Polar M400. The Polar M400 is, in our opinion, the BEST GPS RUNNER’S watch on the market. It has all the PERFORMANCE tracking features you would expect from a competent runner’s watch, plus, a wealth of Training Load and Training Benefit feedback to help you better understand the training effect of each session and the predicted time required before you are fully recovered. It also features a reliable and well researched/accurate Fitness Test that can be conducted once or twice a month to keep track of your general fitness improvement (based on RR intervals and HRV) … Just like the Forerunner 25 it’s also an activity tracker, sleep monitor and it’s smartphone connected for incoming alerts …  plus it supports DOZENS of sports profiles, not JUST running.


We’ve put together some of the best images of the Forerunner 25. The aim of these pictures is to give a clearer understanding of the interface of the watch and showcase it’s main features.

Forerunner 25 showing pace and distance on screen 1

The second screen on Forerunner 25 with Pace and Calories burnt

Live view with running pace and calories burnt
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Forerunner 25 third screen with Heart Rate BPM and HR Zone

Heart Rate 151 BPM - Heart Zone 3.2

Setting up Auto lapping
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 Forerunner 25 showing Personal Bests

Turning on the activity tracker for 24.7 step counting and sleep monitoring
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Forerunner 25 showing daily activity target set to 7500 steps

History view page
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Technical Specification

*Tech spec courtesy of Garmin

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Physical & Performance

Physical dimensions Purple/Black & White/Pink: 35.9 x 43.9 x 13.9 mm
Blue/Black & Black/Red: 40.2 x 47.0 x 13.9 mm
Display size, WxH Purple/Black & White/Pink: 18.5 x 18.5 mm
Blue/Black & Black/Red: 23 x 23 mm
Display resolution, WxH 128 x 128 pixels
Weight Small: 31 g
Large: 39 g
Battery Rechargeable lithium-ion
Battery life Small: 8 weeks, watch mode; 8 hours in training mode; Large: 10 weeks, watch mode; 10 hours in training mode
Water rating 5 ATM
GPS-enabled Yes
High-sensitivity receiver Yes

Maps & Memory

History 7 activities

Running Features

Virtual Pacer™ (compares current pace to target) Yes
Accelerometer (calculates distance for indoor workouts, without need for a foot pod) Yes
Personal records Yes

Performance Features

Heart rate monitor Yes (Some versions)
Foot pod Yes (optional)
Auto Pause® (pauses and resumes timer based on speed) Yes
Auto Lap® (automatically starts a new lap) Yes
Time/distance alert (triggers alarm when you reach goal) Yes
Heart rate-based calorie computation Yes
Calculates calories burned Yes
Customizable screen(s) Yes
Shock Resistant Yes

Activity Tracking Features

Step counter Yes
Auto goal (learns your activity level and assigns a daily step goal) Yes
Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it) Yes
Sleep monitoring (monitors total sleep and periods of movement or restful sleep) Yes

Garmin Connect™

Garmin Connect™ compatible (online community where you analyze, categorize and share data) Yes
Automatic sync (automatically transfers data to your computer) Yes


  • Bluetooth Smart (BLE) transfers to Garmin Connect Mobile
  • Smart notifications
  • Time, distance, and calories alerts as well as heart rate and run/walk alerts


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