Garmin Instinct 3 Solar vs Garmin Instinct 2
The Instinct 3 Solar is the better watch on paper: it lasts longer on GPS (40 hours), tracks sleep in more depth and comes in 2 sizes. The Instinct 2 doesn't beat it on any spec that matters.
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Key differences
-
Battery life
Evenly matched
Similar battery life: up to 28 days and 28 days.
-
GPS
Instinct 3 Solar wins
The Garmin Instinct 3 Solar adds multi-band GPS for more accurate tracks.
-
Display
Evenly matched
Both have MIP screens of a similar size.
-
Health
Evenly matched
Much the same health sensors.
-
Weight
Evenly matched
Similar weight: 52 g and 52 g.
Other differences
- Sleep Instinct 3 Solar wins
The Instinct 3 Solar goes further on sleep, with sleep coaching.
- Sizes Instinct 3 Solar wins
The Instinct 3 Solar comes in 2 case sizes (45 and 50 mm).
Which one should you choose?
Choose the Instinct 3 Solar if…
- You do long runs, rides or hikes: it's rated for 40 hours with GPS.
- You want to sleep better: it scores each night and tells you what to change.
- You want the right fit for your wrist: it comes in more than one size.
Choose the Instinct 2 if…
- You prefer its look and app: it covers the same essentials as the Instinct 3 Solar.
Full spec comparison
The Instinct 3 Solar leads on battery life; elsewhere the two are closely matched.
Green cells with a ✓ mark the better spec in that row. Tick "Show differences only" to hide the rows where they match.
Overview
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Brand | Garmin | Garmin |
| Series | Instinct | Instinct |
| Versions | Instinct 3 – 50 mm, Solar, Instinct 3 – 45 mm, Solar, Tactical Edition, Instinct 3 – 50 mm, Solar, Tactical Edition | — |
Platform & apps
Both work with the same phones and software.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Operating system | Garmin | Garmin |
| Works with | iPhone and Android | iPhone and Android |
| Storage | 0.125 GB | — |
| App store | Yes | Yes |
Display
The screens are closely matched.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Display type | MIP | MIP |
| Screen size | 0.9 in | 0.9 in |
| Resolution | 176 x 176 | 176 x 176 |
| Colour display | No | No |
Design & durability
The Instinct 3 Solar is ahead on size and durability.
It comes in 2 sizes, and the Instinct 2 doesn't beat it on anything here.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Case sizes | 45 / 50 mm | 45 mm |
| Dimensions | 45 x 45 x 14.9 mm | 45 x 45 x 14.5 mm |
| Thickness | 14.9 mm | 14.5 mm |
| Weight (case) | 52 g | 52 g |
| Case material | fiber-reinforced polymer | Fibre-reinforced polymer |
| Bezel material | fiber-reinforced polymer/aluminum | Fibre-reinforced polymer |
| Lens | Power Glass | chemically strengthened glass |
| Band material | silicone | silicone |
| Band width | 22 mm | 22 mm |
| Band fitting | QuickFit 22 mm | QuickFit 22 mm |
| Fits wrists | 137-204 mm | 135-230 mm |
| Water resistance | 10 ATM | 10 ATM |
Battery
The Instinct 3 Solar is ahead on battery life.
It lasts longer on GPS (40 hours), and the Instinct 2 doesn't beat it on anything here.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Battery (smartwatch mode) | 28 days | 28 days |
| Battery (GPS) | 40 hours | 30 hours |
| Battery (multi-band GPS) | 24 hours | — |
| All battery modes | Smartwatch: 28 days; Battery saver: 65 days; GPS: 40 hours; All satellite systems: 28 hours; Multi-band GPS: 24 hours; Max battery GPS: 4.2 days | Smartwatch: 28 days; Battery saver: 65 days; GPS: 30 hours; Max battery GPS: 2.9 days |
| Solar charging | Yes | — |
| Battery type | Lithium ion | Lithium ion |
| Charging | proprietary-plug | proprietary-plug |
GPS & navigation
Both have built-in GPS with similar capabilities.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| GPS | Built-in | Built-in |
| Multi-band GPS | Yes | — |
| Satellite systems | GPS, GLONASS, Galileo | GPS, GLONASS, Galileo |
| Automatic GNSS mode | Yes | — |
| Maps | Breadcrumb trail | Breadcrumb trail |
| Navigation features | back-to-start, waypoints | point-to-point navigation, Breadcrumb trail in real time, back-to-start, TracBack, projected waypoint, course guidance |
Health & sensors
The Instinct 3 Solar is ahead on health tracking.
It tracks sleep in more depth, and the Instinct 2 doesn't beat it on anything here.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Sensors | optical HR, SpO2, barometer, compass, gyroscope, accelerometer, thermometer | optical HR, SpO2, barometer, compass, accelerometer, thermometer |
| Heart-rate sensor | Garmin Elevate | Garmin Elevate |
| Heart-rate tracking | 24/7 | 24/7 |
| High/low heart-rate alerts | Yes | Yes |
| Heart-rate variability | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Respiration rate | Yes | Yes |
| Sleep tracking | Sleep coaching | Sleep score |
| Stress tracking | Yes | Yes |
| Energy score | Body Battery | Body Battery |
| Readiness score | Training Readiness | Training Readiness |
| Cycle tracking | Yes | Yes |
Safety
Both offer much the same safety features.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Emergency SOS | Via phone | Via phone |
| Incident detection | Yes | Yes |
| Live tracking | Yes | — |
Training
Training features are evenly matched.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Auto activity detection | Yes | Yes |
| Triathlon / multisport | Yes | Yes |
| Swim tracking | Pool and open water | Pool and open water |
| Underwater heart rate | Yes | Yes |
| Training metrics | VO2 max, training load, training effect, recovery time, race predictor, lactate threshold, HRV status | VO2 max, training load, training effect, recovery time, race predictor, HRV status |
| Adaptive coaching | Yes | Yes |
| Running dynamics | Yes | Yes |
| Wrist running power | Yes | Yes |
| Strength rep counting | Yes | Yes |
| Heart-rate broadcast | Yes | Yes |
| External sensors | ANT+, foot pod, power meter, speed/cadence, bike radar/lights, CT10 club tracking | ANT+, power meter, foot pod, speed/cadence, bike radar/lights |
| Smart trainer control | Yes | Yes |
Smart features
Both offer much the same smart features.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Notifications | Yes | Yes |
| Message replies | Android | Android |
| Contactless payments | Yes | — |
| Payment service | Garmin Pay | — |
| Find my phone | Yes | Yes |
| Find my watch | Yes | — |
| Flashlight | Yes | — |
Diving, golf & more
Neither has a specialist edge here.
| Spec | Garmin Instinct 3 Solar | Garmin Instinct 2 |
|---|---|---|
| Specialist modes | golf, tactical | golf, tactical |