The Timex Ironman series has proved itself time and again. Let’s take a look at the pros and cons of the latest addition, the Timex Ironman R300 GPS.

Timex Ironman R300 GPS

Sensors & GPS

The R300 GPS has a built in optical heart rate sensor on the back. However, it will not work properly if the watch is too loose, aim for at least one finger width above your wrist bone. Additionally, a built-in accelerometer is used to track activity like steps, distance, and cadence. Although the accelerometer is mainly used for non-GPS running and walking, it can be calibrated using Treadmill mode to improve its accuracy.

The GPS requires periodic software updates to achieve the best performance. Moreover, for proper recording of your outdoor workouts, you will have to wait for the GPS to sync up ahead of your session.

Watch Face & Display

The Ironman GPS R300 uses a sunlight-readable display which makes it easy to read at a glance. Moreover, you can see the essential fields like distance, average pace, and duration, all on the same page. Additionally you can customize the pages through the settings. This allows you to display any data fields required, as few as one and as many as three.

There is a large collection of watch faces that you can choose through the app. However, be advised that a custom watch face will drain the battery faster. Although the change won’t be big enough to be noticeable.

Battery Life & Features

The R300 GPS takes 2 hours to charge and advertises a battery life of 25 days with regular use, or 20 hours of GPS use. Additionally, it is water resistant up to 30m (100ft) which means you can use it when swimming but not diving.

Unfortunately, in order to listen to music you’ll need your phone, as the watch only allows controlling the music. Although, a plus is that you can connect the watch to apps like GoogleFit, Apple Health or Strava.

Timex Ironman R300 GPS Device Settings

Incoming callsTurn on or off alerts on the watch when a call is received. Additionally, you can set a delay so that if you answer the phone prior, the watch will not notify you of the incoming call.
App AlertsThis feature allows you to control which apps send notifications to the watch.
Idle AlertThis allows you to turn on a “get active” alert, if you are stationary for more than 1 hour. You can also set the time period during the day when this alert is enabled.
Incoming SMSEnable notifications for text messages.
Incoming EmailEnable alerts for incoming email. Incoming Email will have independent functions in the iOS system, and Android email will be used as an APP alerts
Activity Goal AlertEnable or disable and choose which activity goal (Step, Distance or Calories) you would like to be notified of reaching. You will receive notifications of being halfway to and completing your goal for the day.
Disconnection notificationLet’s you know that your watch is out of range of your phone


While we try to stay neutral and leave the conclusion to the reader, it can be said that the Timex Ironman R300 GPS is more than you can ask for in a fitness watch at this price. As can be seen from this review, the pros far outweigh the cons, and you’d be hard pressed to find a better watch in this price range.