Garmin Forerunner 970 vs Oura Ring 4: Which Should You Buy?

Overview

The Garmin Forerunner 970 and Oura Ring 4 are built for fundamentally different people. The Forerunner 970 targets serious runners and multisport athletes who want structured training, real-time GPS, and workout metrics on their wrist. The Oura Ring 4 targets health-conscious adults who want accurate sleep staging, recovery data, and a device they can forget they are wearing. Comparing them directly is like comparing a stopwatch to a thermometer: both measure useful things, but not the same things.

Specs at a Glance

Price: Forerunner 970 ~£599 / Oura Ring 4 ~$349-$499 plus $5.99/month subscription
Form factor: Full GPS watch (touchscreen) vs screenless titanium ring (4-6g)
GPS: Forerunner 970 has multi-band GNSS onboard; Oura Ring 4 has none, relies on paired phone
Battery life: Forerunner 970 multi-day in GPS mode; Oura Ring 4 up to 7 days (168h) without GPS drain
Heart rate sensor: Both use optical PPG (blood volume via LED light); Oura uses infrared and red LED on the finger, Forerunner uses wrist-based green LED
Sleep tracking accuracy: Oura finger placement outperforms Garmin wrist placement against polysomnography benchmarks
Altimeter: Forerunner 970 has barometric altimeter; Oura Ring 4 does not
Water resistance: Forerunner 970 at 5 ATM; Oura Ring 4 at 100m

GPS and Tracking Accuracy

The Forerunner 970 uses multi-band GNSS and is designed for precise outdoor tracking. However, a 2026 controlled track test found the 970 did not lead the field, with at least one competitor outperforming it in that test. That is a disappointing result at this price point, though multi-band GPS still provides solid real-world route accuracy for the vast majority of runs.

The Oura Ring 4 has no onboard GPS at all. For workout route mapping it depends entirely on your phone being present. This is a genuine limitation for runners, cyclists, or anyone training without a phone. Where Oura does track well is physiological data during rest. Finger-based PPG captures a cleaner arterial signal than wrist-based sensors, giving Oura a real hardware advantage for HRV and sleep metrics. Garmin wrist devices show only 40-50% agreement with polysomnography for sleep stage identification. Oura consistently outperforms that benchmark.

Battery Life

The Oura Ring 4 wins this comparison clearly. Up to 168 hours between charges, with no GPS to drain the battery, means most users charge it roughly once a week. The Forerunner 970 offers multi-day battery in GPS mode, which is competitive for a GPS watch, but it cannot match a week of passive use. If you regularly forget to charge wearables, the Ring 4 is far more forgiving. If you need active GPS tracking for long ultras or triathlons, the Forerunner 970 is the only viable option here.

For Athletes: Who Wins?

Running: Forerunner 970. Onboard GPS, structured training plans, real-time pace and cadence data. The Oura Ring 4 cannot replace a GPS watch for running.
Trail and ultra running: Forerunner 970. Barometric altimeter, multi-band GPS, and multi-day battery in GPS mode make it the clear choice. Oura is not a trail tool.
Triathlon and multisport: Forerunner 970. Multi-sport modes, swim tracking, and full sensor suite. The Ring 4 is 100m water resistant but offers no swim metrics or structured multisport support.
Recovery and sleep: Oura Ring 4. Superior sleep stage accuracy, consistent HRV tracking during sleep, and a form factor that does not interrupt sleep. Athletes who already have a GPS watch and want better recovery data should add the Ring 4, not replace their watch with it.

Verdict

These devices do not compete. The Forerunner 970 is a training tool for athletes who need GPS, structured workouts, and real-time metrics. The Oura Ring 4 is a recovery and sleep tracker for people who want passive, accurate health data without a screen on their wrist. Serious runners and triathletes should buy the Forerunner 970 and accept its weaker sleep tracking as a trade-off. Anyone whose primary goal is sleep quality, HRV trends, or recovery monitoring, and who already owns or does not need a GPS watch, should buy the Oura Ring 4. Do not buy the Oura Ring 4 expecting it to replace a running watch. It will not.