Garmin Forerunner 970 vs Fitbit Air: Which Wearable Wins?
Overview
The Garmin Forerunner 970 is a serious multisport GPS watch for runners and triathletes who want deep training metrics and the full Garmin ecosystem at around £600. The Fitbit Air is a small pebble-form tracker aimed at health-conscious users who want continuous monitoring without a full smartwatch. These two devices are not really competing for the same buyer, but if you are deciding between a fitness-first tracker and a dedicated running watch, the differences matter.
Specs at a glance
- GPS: Forerunner 970 has multi-band GNSS; Fitbit Air GPS status unconfirmed
- Heart rate sensor: Both use wrist optical PPG (light-based blood volume measurement, not electrical)
- Additional sensors: Both include SpO2 and skin temperature; Forerunner 970 adds a barometric altimeter
- Display: Forerunner 970 has a full touchscreen; Fitbit Air has minimal or no display
- Battery life: Forerunner 970 has extended GPS mode with battery manager; Fitbit Air battery specs unconfirmed
- Price tier: Forerunner 970 around £600; Fitbit Air mid-to-upper-mid range
- Form factor: Forerunner 970 is a full watch; Fitbit Air is a compact pebble worn on the wrist
- Ecosystem: Forerunner 970 runs Connect IQ apps; Fitbit Air runs the Google/Fitbit platform
GPS and tracking accuracy
The Forerunner 970 has confirmed multi-band GNSS. In a controlled track test against the Apple Watch Ultra 3, Amazfit Balance 2, and Huawei Runner 2, the Forerunner 970 did not come out on top. For a £600 running watch, losing a track test to lower-priced competitors is a real weakness, not a minor footnote.
The Fitbit Air's GPS capability is unconfirmed in available sources. If it relies on a connected phone for GPS, that is a significant limitation for any user who wants standalone route tracking. On heart rate accuracy, the Air performed well in moderate-intensity gym and steady running conditions, matching reference devices to within about one beat per minute. However, in a separate statistical analysis during a HYROX simulation, the Air produced the widest error range of any device tested. That inconsistency is a problem for users who need reliable data across varied intensity levels.
Battery life
The Forerunner 970 supports an extended GPS mode and received firmware updates adding battery manager insights, which suggests meaningful GPS runtime for long efforts. Exact hours from the review data are not confirmed, but the feature set indicates it is built for multi-hour and multi-day use cases.
The Fitbit Air's battery life is not confirmed in available sources. Without that data, it is impossible to compare directly. Users planning long trail runs or ultramarathons cannot make an informed choice on the Air without this information.
For athletes: who wins?
- Running: Forerunner 970 wins on features and GPS capability, though its track accuracy disappointed in testing. The Fitbit Air lacks confirmed standalone GPS, which rules it out for most runners.
- Trail and multisport: Forerunner 970 wins clearly. Barometric altimeter, multi-band GNSS, and Connect IQ app support make it the only credible option here. The Fitbit Air is not built for this use case.
- Triathlon: Forerunner 970 wins. Water resistance is confirmed and it is designed for multisport. The Fitbit Air's water resistance is unconfirmed.
- Recovery and daily health tracking: This is the Air's strongest ground. In steady-state conditions it tracks heart rate competitively and suits users focused on continuous passive monitoring. The inconsistent accuracy under high intensity remains a concern even here.
Verdict
The Garmin Forerunner 970 is the clear choice for anyone who trains seriously with running, cycling, swimming, or multisport events. Its GPS track test result was disappointing for the price, but it offers confirmed multi-band GNSS, a barometric altimeter, extended battery modes, and a full training ecosystem that the Fitbit Air simply cannot match.
The Fitbit Air suits health-conscious users who want passive monitoring and are not planning structured GPS-based workouts. Its heart rate accuracy holds up in moderate conditions but falls apart under high intensity, which limits its usefulness even for casual athletes.
Buy the Forerunner 970 if you are a runner, triathlete, or anyone who trains with a plan and needs reliable GPS data. Buy the Fitbit Air only if your priority is lightweight daily health tracking and you have no need for standalone GPS or high-intensity workout accuracy.
Comparison updated 9/2/2026. Contains affiliate links.