This is an excellent, although slightly dated, mid-level sports watch aimed specifically at runners. It provides in-depth metrics while remaining easy to use on the move.
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Pro It easily oupterforms newer and more expensive watches
Even though this watch was first introduced in 2015, in many ways it still beats the vast majority of new and much more expensive watches: It's 10 to 20 grams lighter than most alternatives; The battery lasts for four whole weeks with the GPS turned off, when the majority of newer models last only for 5-10 days. In GPS mode, it lasts for 16 hours, outperforming most watches that hold a charge for 5-10 hours. And with both GPS and Glonass, the precision and reliability of tracking are great too. Best part of all, the Forerunner 630 comes around $200 cheaper than what you'd pay for a newer watch with comparable performance.
Pro It's a powerful tool for experienced runners
On top of tracking the stats that most sports watches track, such as step count, burned calories and covered distance, the Forerunner also records a number of in-depth measurements, like heart-rate patterns, running cadence, VO2 max, and many others.
Pro Very long battery life
In idle mode, the battery will last for up to four weeks, when most GPS watches last at best 7-10 days. Of course, the actual battery life will depend largely on how you use the watch, but it's one of the best batteries available in a sports watch nevertheless.
Pro Mapping is very reliable
The Forerunner has both GPS and Glonass services, so there's very little chance that it will lose your geolocation. There's also UltraTrack, a tracking mode with low energy consumption but less precision that can be helpful during a multiple-day hike.
Pro Using it is intuitive
Especially if you owned previous Garmin models, using this watch is very simple. All modes and apps can be accessed via the touchscreen. You can also access some functions, like turning the watch on and off and locking the screen with physical buttons on the sides.
Pro You can use it as an everyday watch
Besides tracking various fitness indicators, you can use this watch to get call and text notifications from your phone and check the weather.
Pro The display is easy to read
The screen is big enough for you to be able to easily follow paths and read notification and text messages. The image is very clear, even under direct sunlight.
Con It's only designed for runners
The Forerunner 630 only has one tracking mode - running. If you also do a lot of biking or swimming, or any other activity, you won't get any meaningful data.
Con There's no built-in heart rate monitor
You can only get heart rate data if you purchase the Forerunner 630 Bundle that includes a chest strap. It will cost you about $450.