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Polar Street X vs Garmin Forerunner 955 Solar

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Lowest recorded store prices take priority over announced or launch prices, within the selected source market. Currencies use the dated EUR reference rates. Deposits and recurring charges are excluded from price order; missing prices stay last. Original price records remain visible.

The differences that matter

Polar Street X

Running, mixed training and everyday activity

Satellite positioning
GPS, Galileo, BeiDou and QZSS; route guidance and breadcrumbs ↗
Sensors
Precision Prime optical heart rate, skin temperature, barometer, compass, accelerometer and gyroscope; no ECG or SpO2 ↗
Connection & compatibility
Bluetooth LE; Polar Flow; proprietary USB-C charging cable ↗
Battery / power
Manufacturer modes: up to 10 days smartwatch, 43 h performance training, 170 h eco training ↗

Keep in mind Optical health readings are wellness estimates. Runtime depends on mode. Breadcrumb guidance is not evidence of offline maps.

Garmin Forerunner 955 Solar

Multisport training and mapping

Keep in mind Optical wrist measurements and training estimates are not a clinical diagnosis. Battery runtime varies with mode and feature use.

Published specifications and documented constraints. See the full comparison below for prices and sources.

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Polar Street X versus Garmin Forerunner 955 Solar
SmartwatchesAdd a model
Polar Street X
Smartwatches · PolarPolar Street XReleased
Garmin Forerunner 955 Solar - Ray Maker original photograph of Forerunner 955 Solar. SmartWearGuide has not hands-on tested this model. Photo/source credit: Ray Maker / DC Rainmaker.
Smartwatches · GarminGarmin Forerunner 955 SolarReleased
Prices · all markets
$249.99 USD≈ €222 EURECB 2026-11-04US · Store price · Listed; stock not verified
1 offer records & sources
$249.99 USD≈ €222 EURECB 2026-11-04 US · Store price
Listed; stock not verified · Recheck needed

Polar official US store

Street X, Night Black, standard wristband and charging cable

US page price. Store maintenance was displayed; checkout, tax and shipping were not checked. No stock confirmation.Check merchant offer ↗Price source ↗ Checked 2026-10-26
$599.99 USD≈ €533 EURECB 2026-11-04US · Store price · Listed; fulfilment not independently confirmed
1 offer records & sources
$599.99 USD≈ €533 EURECB 2026-11-04 US · Store price
Listed; fulfilment not independently confirmed · Recheck needed

Garmin

Forerunner 955 Solar, SKU010-02638-00

Manufacturer selected Solar SKU price. Solar runtime requires stated light exposure. Case colour does not establish a separate hardware generation.Check merchant offer ↗Price source ↗ Checked 2026-10-12
Designed forRunning, mixed training and everyday activity ↗Multisport training and mapping ↗
Display1.28-inch AMOLED touchscreen; 416 × 416; always-on option ↗Not verified
SensorsPrecision Prime optical heart rate, skin temperature, barometer, compass, accelerometer and gyroscope; no ECG or SpO2 ↗Not verified
Satellite positioningGPS, Galileo, BeiDou and QZSS; route guidance and breadcrumbs ↗Not verified
Battery / powerManufacturer modes: up to 10 days smartwatch, 43 h performance training, 170 h eco training ↗Not verified
Water / dust ratingWR50; manufacturer lists MIL-STD-810H testing ↗Not verified
Connection & compatibilityBluetooth LE; Polar Flow; proprietary USB-C charging cable ↗Not verified
ControlsTouchscreen, physical buttons and integrated white/red LED light ↗Not verified
MaterialBio-based plastic case and bezel; Gorilla Glass ↗Not applicable to this category
Storage32 MB ↗Not applicable to this category
Form factorNot applicable to this categoryWrist watch ↗
Selected HardwareNot applicable to this categoryForerunner 955 Solar, SKU010-02638-00; manufacturer gallery photograph may show another case colour ↗
BatterylifesmartwatchmodeNot applicable to this categoryUp to 15 days 20 days with solar ↗
DisplaytypeNot applicable to this categorySunlight-visible, transflective memory-in-pixel (MIP) ↗
WaterratingNot applicable to this category5 ATM ↗
StrapmaterialNot applicable to this categorysilicone ↗
LensmaterialNot applicable to this categoryCorning® Gorilla® Glass 3  DX ↗
BezelmaterialNot applicable to this categoryfiber-reinforced polymer ↗
WeightNot applicable to this category53 g ↗
Display SizeNot applicable to this category1.3" (33 mm) diameter ↗
DisplayresolutionNot applicable to this category260 x 260 pixels ↗
BatterylifeNot applicable to this categorySmartwatch mode: Up to 15 days/20 days with solar* GPS-only mode without music: Up to 42 hours/49 hours with solar** All-Systems GNSS mode plus Multi-Band with music: Up to 8.5 hours All Systems GNSS mode plus Multi-Band without music: Up to 20 hours/22 hours with solar** Ultratrac mode: Up to 80 hours/110 hours with solar** See Details *Solar charging, assuming all-day wear with 3 hours per day outside in 50,000 lux conditions ** Solar charging, assuming use in 50,000 lux conditions ↗
Memory HistoryNot applicable to this category32 GB ↗
AvailabilityOfficial US listing verified. First retail date and local delivery remain unverified; shop maintenance was displayed.Manufacturer documentation verified. Destination checkout and fulfilment were not tested.
Important context
  • Optical health readings are wellness estimates. Runtime depends on mode. Breadcrumb guidance is not evidence of offline maps.
  • Optical wrist measurements and training estimates are not a clinical diagnosis. Battery runtime varies with mode and feature use.
Editorial pick & releaseNo editorial ranking recordedNo editorial ranking recorded
EvidenceManufacturer source Checked 2026-10-26Manufacturer source Checked 2026-10-12

Battery claims use different conditions and are not a controlled benchmark. “Not verified” is an evidence gap, not a missing feature. Prices are dated regional snapshots. Deposits, bundles and historical launch prices are labelled. Brightness measurement methods and battery workloads vary by manufacturer.