Garmin Forerunner 170 vs Forerunner 970: Which Should You Buy?

Overview

The Forerunner 170 is Garmin's entry into serious running tracking at $299.99, built for beginner-to-intermediate runners who want a full sensor stack without paying flagship prices. The Forerunner 970 is the opposite end of the lineup at roughly $650, targeting serious runners and triathletes who want Garmin's most complete training and health platform. The price gap is large and the feature gap is real, but the 970's GPS accuracy results in testing complicate its value argument.

Specs at a glance

Price: Forerunner 170 at $299.99 / £259.99 vs Forerunner 970 at ~$650 / £599.90
Display: Both AMOLED touchscreen
GPS: Both multi-band GNSS; 970 adds barometric altimeter for elevation data
Sensors: Both include wrist optical PPG heart rate, HRV, SpO2, and skin temperature; 970 adds barometric altimeter
Water resistance: 970 confirmed at 10 ATM; 170 unconfirmed but standard Garmin running watch rating
Third-party app support: 970 has full Connect IQ support confirmed; 170 status not confirmed in available data
Training tools: 970 targets triathletes with extended sport profiles and firmware-level battery manager insights; 170 targets single-sport runners
Weight: Not confirmed for either device in available review data

GPS and tracking accuracy

Both watches use multi-band GNSS, which is the right foundation for accurate positioning. The 970, however, produced a uncomfortable result in controlled track testing: it was beaten by at least one cheaper competitor in pure GPS accuracy. The Amazfit Cheetah 2 Ultra, priced identically in the UK, hit 85% GPS accuracy in its own testing. Being outperformed on a track at $650 is a real weakness for the 970, even if road and trail performance remains competitive day-to-day.

For the 170, multi-band GNSS at this price tier is genuinely impressive positioning hardware. However, the undisclosed battery-mode quirk flagged in testing raises questions about how the watch manages GPS satellite systems in practice. If the watch silently drops to a less accurate mode to save battery, real-world GPS fidelity may not match the hardware's potential. Neither watch has a clean bill of health here, but the 970's accuracy gap is more damaging given its price.

Battery life

Exact GPS hours are not confirmed for the Forerunner 170 in available review data, which is a problem. The switch to AMOLED at this price tier brings display quality improvements but also increases power draw, particularly at high brightness outdoors. Combined with the undisclosed battery-mode behavior, the 170's real-world GPS endurance is genuinely unclear. The Forerunner 970 offers an extended GPS mode and firmware-level battery manager insights added in version 16.28, giving users clearer projections. For multi-hour efforts, trail runs, or triathlon racing, the 970 at least lets you understand and manage your battery situation. The 170 does not.

For athletes: who wins?

Running (road, beginner to intermediate): Forerunner 170. Full sensor stack, AMOLED display, multi-band GPS at $299.99 covers everything most runners need. The 970 adds nothing meaningful here that justifies doubling the price.
Trail running: Forerunner 970. The barometric altimeter gives reliable elevation data via air pressure rather than GPS-derived estimates, which matters on technical terrain. The 170 lacks this sensor.
Triathlon: Forerunner 970. Multi-sport profiles, extended battery modes, and the full Garmin training ecosystem are built for this. The 170 is a running watch, not a triathlon tool.
Recovery and health monitoring: Tie. Both carry optical PPG heart rate, HRV, SpO2, and skin temperature. The physiological monitoring stack is effectively the same between these two watches at the sensor level.

Verdict

For most runners, the Forerunner 170 is the right buy. It delivers the core sensor hardware and GPS technology that serious running tracking requires at a price that does not require justification. The 970's GPS accuracy result in controlled testing is a real problem for a $650 watch, and the extra cost only makes sense if you genuinely need triathlon support, a barometric altimeter, or extended multi-sport battery management. If you are a committed triathlete or trail runner who lives in Garmin's ecosystem, buy the 970. If you are a runner, even a serious one, the 170 covers your actual needs and keeps $350 in your pocket.