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Garmin Forerunner 165 Music vs Garmin Forerunner 35

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

GarminForerunner 165 MusicGarminForerunner 35
Overview
ReleasedFebruary 20242016
Display
Case sizes43 mm40.7 mm
PanelOLEDMemory-in-pixel
Always-on displayYesYes
Display detail1.2-inch (30.4 mm diameter) colour AMOLED touchscreen, 390 x 390 pixels; optional always-on display; five physical buttons0.93 × 0.93-inch (23.5 × 23.5 mm) monochrome, transflective memory-in-pixel display, 128 × 128 pixels; button controls and a backlight.
Screen protectionChemically strengthened glassChemically strengthened glass.
Health and fitness
ECGNoNo
Blood oxygenYesNo
Skin temperatureNoNo
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandSingle-band
Water resistance50 m50 m
SensorsGarmin Elevate wrist heart rate; Pulse Ox; barometric altimeter; compass; accelerometer; thermometer; ambient light sensor; GPS, GLONASS and GalileoBuilt-in GPS, Garmin Elevate optical heart-rate sensor and accelerometer; supports ANT+ heart-rate and cycling sensors.
Health featuresContinuous heart rate with high/low alerts; HRV status; Body Battery; stress, respiration and blood oxygen; advanced sleep and sleep score; sleep coach and nap detection; Health Snapshot; hydration and women's health tracking; no ECG appContinuous heart rate, steps, calories, distance, sleep and intensity-minute tracking, with inactivity alerts and Move IQ activity recognition.
Fitness featuresDaily suggested running workouts and Garmin Coach plans; training effect and recovery time; wrist-based running dynamics and running power; PacePro; VO2 max and race predictions; pool and open-water swimming; running, cycling, strength, HIIT, yoga, Pilates, tennis, pickleball and padel profiles; point-to-point and breadcrumb course navigation, back-to-start and TracBack; no full offline maps or dedicated triathlon mode; no training readiness, load or status (Wareable and Tech Advisor)Outdoor and indoor running, walking, cycling and cardio profiles; virtual pacing, intervals, personal records and vibration alerts. No swim-tracking profile.
Safety featuresIncident detection during selected activities, assistance and LiveTrack require a paired compatible smartphone and connectivity; live event sharing is Android-onlyLiveTrack shares a run's location when paired with a compatible smartphone.
Battery and connections
Battery life (maker's claim)Up to 11 daysUp to 9 days
In low-power modeUp to 20 days–
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Storage4 GB–
Battery life detailSmartwatch up to 11 days; battery saver smartwatch up to 20 days; GPS-only up to 19 hours; all-systems GNSS up to 17 hours; GPS-only with music up to 7 hours; all-systems with music up to 6.5 hours; actual life depends on display settings, enabled features and useUp to nine days with notifications, activity tracking and wrist heart rate, or 13 hours in GPS training mode.
ChargingGarmin proprietary plug charging/data cable; rechargeable built-in batteryRechargeable lithium-ion battery with a USB charging clip.
ConnectivityBluetooth and ANT+ and Wi-Fi; stores music for Bluetooth headphones; Spotify, Deezer and Amazon Music downloads require compatible subscriptions; Garmin Pay; Connect IQ apps, watch faces and data fields; smart notifications; Android-only text responses and notification images; Garmin Share and Garmin Messenger; no cellular connection or multi-band GNSSBluetooth and ANT+; paired-phone notifications, music controls, automatic Garmin Connect uploads and Find My Phone. No Connect IQ app support or music storage.
Storage4 GB memory/history; offline music playbackSeven activities of on-watch history.
Design
Weight (lightest version)39 g37.3 g
SoftwareGarminGarmin
Case materialsFibre-reinforced polymer bezel; chemically strengthened glass; silicone band; 5 ATM water ratingSilicone strap and 5 ATM water rating.
Size43 x 43 x 11.6 mm; Garmin lists 39 g without a separate body-only weight35.5 × 40.7 × 13.3 mm; 37.3 g. The longest case dimension is used in the size comparison.
Bands20 mm quick-release silicone bands; fits 126–203 mm wristsFits wrists 140–200 mm.
ColoursBlack/Slate Grey; Mist Grey/Whitestone; Turquoise/Aqua; Berry/Lilac (currently not sellable on the UK maker page)Black case and band; Garmin also sold limelight, frost blue and white versions.
In the boxForerunner 165 Music; charging/data cable; documentation–

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