TL;DR
- For 2026, buy COROS if battery life and a subscription-free model decide it, and Garmin if you want the deepest feature set and ecosystem. At the budget tier the COROS PACE 3 runs 38 hours of GPS versus the Garmin Forerunner 165's 19 hours.[2][4]
- The PACE 3 has dual-frequency (multiband) GNSS; the Forerunner 165 has multi-GNSS but no multiband. That gap matters in cities and tree cover, not on open roads.[1][4]
- Neither brand gates its training metrics behind a mandatory subscription. COROS has no paid tier; Garmin's optional Connect+ is $6.99/month and does not lock Body Battery, Training Readiness, or HRV Status.[5]
- The deciding question is ecosystem, not raw sensors. Garmin has the larger app library and accessory range; COROS wins on battery, simplicity, and price.
Garmin and COROS sit at opposite ends of the same running-watch market: Garmin sells breadth, COROS sells battery life and a flat, subscription-free price. This comparison uses the two most directly comparable budget-tier 2026 models, the COROS PACE 3 and the Garmin Forerunner 165, with verified vendor specs, and then scales the conclusion to the wider lineups. All figures were verified as of 2026-05-25.
Verified spec comparison
| Spec | COROS PACE 3 | Garmin Forerunner 165 |
|---|---|---|
| Price (USD) | $229 launch; $199 current[2] | $249.99; $299.99 Music[3] |
| GPS-only battery | 38 hours (standard); 15 hours (dual-frequency)[1][2] | 19 hours[4] |
| Daily / smartwatch battery | Up to 24 days[2] | Up to 11 days[4] |
| GNSS | Dual-frequency (multiband), 5 satellite systems[1] | Multi-GNSS; no multiband[4] |
| Display | Memory-LCD (always-on)[2] | 1.2-inch AMOLED touchscreen[3] |
| Training metrics subscription | None (free) | Free on device; optional Connect+ $6.99/mo[5] |
Battery life is the clearest gap
COROS built its reputation on battery endurance and the PACE 3 holds the line: 38 hours in standard GPS mode against the Forerunner 165's 19 hours, roughly double.[2][4] Switch the PACE 3 into its most accurate dual-frequency mode and the figure drops to 15 hours, which is the honest trade for the higher positioning fix rate.[1] For a marathon or an ultra, the COROS runs the full event with margin; the Forerunner 165 covers a marathon comfortably but leaves a road runner watching the battery on anything longer.
GNSS: multiband versus multi-GNSS
The PACE 3 carries a dual-frequency (multiband) chipset that tracks the L1 and L5 signals from each satellite, which sharpens the fix where signals bounce off buildings or scatter through forest canopy.[1] The Forerunner 165 uses multi-GNSS (several constellations) but stays single-band, so it lacks that second-frequency correction.[4] On open roads the practical difference is small; the multiband advantage shows up in dense downtown grids and switchback trail.
Neither watch needs a subscription
This is the point most buyers get wrong. COROS charges nothing beyond the hardware; every training-load and recovery metric ships with the watch. Garmin introduced the optional Connect+ tier at $6.99 per month, but it does not paywall the core physiological metrics: Body Battery, Training Readiness, HRV Status, Training Status, Recovery Time, and Sleep Score all remain free on a compatible device.[5] Connect+ layers on AI-generated suggestions, expanded coaching, and a live activity feed on top of features you already own. So the running cost of either watch over three years is zero unless you opt in.
What the AMOLED-versus-LCD choice costs you
The Forerunner 165's AMOLED screen is brighter and sharper than the PACE 3's memory-LCD, and it drives a meaningful slice of the 165's shorter battery life. COROS keeps the always-on transflective display precisely because it sips power. If you want a vivid watch face and music storage, the Garmin earns its premium; if the screen is just a data readout during runs, the COROS trade is the better one.
Decision frame
- Maximum battery, lowest price, zero subscription: COROS PACE 3.
- Brightest screen, music, the largest ecosystem and accessory range: Garmin Forerunner 165.
- Ultra distances or multi-day expeditions: COROS, and look up the lineup to the longer-running APEX or VERTIX tiers.
- You already own Garmin sensors or want Connect+ AI coaching: stay in the Garmin ecosystem.
Whichever you pick, the watch sets your training zones from a measured maximum or threshold rather than an age formula. Sanity-check the zone boundaries with the Heart Rate Zone Calculator and the underlying methods in Heart Rate Zones: Methods Compared.
Verified as of 2026-05-25. Prices and specs change without notice; confirm on each vendor page before purchase.
FAQ
Does COROS require a subscription like some Garmin features?
No. COROS has no paid software tier; all training and recovery metrics are included with the watch. Garmin's optional Connect+ subscription is $6.99 per month, but the core recovery metrics stay free on a compatible Garmin device.[5]
Is COROS GPS more accurate than Garmin?
The COROS PACE 3 has dual-frequency (multiband) GNSS, which the Garmin Forerunner 165 lacks.[1][4] That advantage is most visible in cities and forest cover. On open terrain both track distance closely. Higher Garmin tiers (Forerunner 265, 965, Fenix) do include multiband.
How much longer does the COROS battery last?
The PACE 3 runs 38 hours of standard GPS versus 19 hours on the Forerunner 165, and up to 24 days of daily use versus 11 days.[2][4] The PACE 3's most accurate dual-frequency mode draws more power, at roughly 15 hours.[1]
Which is better for a first marathon?
Both cover a marathon. The Forerunner 165 adds an AMOLED screen, music, and the larger Garmin ecosystem; the PACE 3 is cheaper, lasts longer, and adds dual-frequency GPS. For pure value and battery, the COROS; for ecosystem and screen, the Garmin.
What's the best running watch with no subscription under $250?
The COROS PACE 3 (about $199 current). It has no paid software tier at all, so every training and recovery metric ships with the watch, and it undercuts the Forerunner 165 ($249.99). A base Garmin Forerunner 165 also fits under $250 and keeps its core recovery metrics free, with Connect+ ($6.99/mo) optional rather than required.[1][3][5]
Which watch is best for battery life on long runs and multi-day use?
The COROS PACE 3. It runs 38 hours of standard GPS against 19 hours on the Forerunner 165, and up to 24 days of daily use against 11 days. Its most accurate dual-frequency GPS mode draws more power, at roughly 15 hours, which still covers a long ultra leg.[1][2][4]
References
- 1 COROS PACE 3 Technical Specifications (battery and GNSS) — COROS (2026)
- 2 COROS PACE 3 In-Depth Review (38 h GPS / 15 h dual-frequency / 24-day battery, dual-band GNSS) — DC Rainmaker (2023)
- 3 Garmin Forerunner 165 product page (price, AMOLED, multi-GNSS) — Garmin (2026)
- 4 Garmin Forerunner 165 In-Depth Review (11-day / 19 h GPS battery, multi-GNSS not multiband) — DC Rainmaker (2024)
- 5 Garmin Connect+ Premium App Features (subscription tier) — Garmin (2026)