Amazfit Active vs Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 47mm, the Amazfit Active is the safer pick — it stays proportionate down to roughly 38mm, where the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition starts to hang over the edge. Above 47mm both sit cleanly, and the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition gives you more presence.
The Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition wears larger than the Amazfit Active (45mm vs 42.36mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Amazfit Active is the slimmer of the two (10.75mm vs 14.9mm), so it slides under a cuff more easily.
On the wrist the Amazfit Active feels lighter (27g vs 52g, case only).
Among the 720 42mm watches we hold thickness for, the Amazfit Active is thinner than 87%, so it wears flatter than its width suggests.
Among the 385 45mm watches we hold thickness for, the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition is thicker than 84% — it will sit high even though the case width reads modest.
The Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition is 2.6mm wider, 9.1mm longer, 4.2mm thicker and 25g heavier than the Amazfit Active.
Amazfit
Active
Garmin
Instinct® 3 – 45 mm, Solar, Tactical Edition
Switch or add watches
Amazfit
Active
Garmin
Instinct® 3 – 45 mm, Solar, Tactical Edition
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Measure at the point where you wear your watch — typically just below the wrist bone.
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Amazfit Active
Case 35.9mm · Lug-to-lug 35.9mm · Thickness 10.8mm · 27g
Understated
35.9mm on a 55mm wrist
Well inside your wrist on every measurement — you have room to go a size up if you want more presence.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 35.9mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist9.6mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.8mm off the skin
Normal sports-watch height for a wrist this size. (10.8mm case, back against the skin)
- How it seats~2.4mm under the rim
Sits flat on the wrist with contact right across the case back.
- Weight on the wrist27g
Light enough to forget you have it on. (0.5g per mm of wrist)
Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition
Case 45.0mm · Lug-to-lug 45.0mm · Thickness 14.9mm · 52g
Balanced Fit
45mm on a 55mm wrist
Across the wrist it works — 5.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 45mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist5.0mm spare each side
Comfortable, with visible skin either side.
- Off the wrist14.9mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (14.9mm case, back against the skin)
- How it seats~5.2mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist52g
Light enough to forget you have it on. (0.9g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Amazfit Active42.4mm × 35.9mm · 10.8mm thick
- Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition45mm · 14.9mm thick
3D preview
Amazfit Active vs Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Furthest apart in Battery Saver mode, where the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition lasts 2.2× as long as the Amazfit Active (65 days against 30 days).
Amazfit ActiveGarmin Instinct® 3 – 45 mm, Solar, Tactical Edition
Battery Saver
720 hours65 daysExpedition GPS
—36 daysSmartwatch
14 days28 daysTraining
240 hours—Max Battery GPS
—100 hoursGPS Only
—40 hours +130 hoursAll Satellite Systems
—28 hours +50 hoursAll Satellite Systems + Multi-Band
—24 hours +40 hoursGPS
16 hours—
Amber figures are the solar-assisted runtime the manufacturer publishes for that mode.
Specifications
The short version
7 key specs| Spec | AmazfitActive | GarminInstinct® 3 – 45 mm, Solar, Tactical Edition |
|---|---|---|
| Case Width | 42.36mm | 45mm |
| Lug-to-Lug | 35.9mm | 45mm |
| Thickness | 10.75mm | 14.9mm |
| Weight | 27g | 52g |
| Shape | Rectangle | Circular |
| Display type | OLED/AMOLED | Monochrome, sunlight-visible, transflective memory-in-pixel (MIP) |
| Released | 2023 | 2025 |
Every specification
368 specs| Spec | Amazfit Active | Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition |
|---|---|---|
| Design | ||
| width | 42.36 | — |
| height | 35.9 | — |
| volume | 16.35 cm³ | — |
| weight | 27 g | — |
| thickness | 10.75 | — |
| ATM rating | 5 ATM | — |
| resolution | 390 x 450 px | — |
| screen size | 1.75 inches | — |
| Display type | OLED/AMOLED | — |
| Has a display | Yes | — |
| pixel density | 341 ppi | — |
| width of band | 20 mm | — |
| water resistance | Water resistant | — |
| Always-On Display | Yes | — |
| has a touch screen | Yes | — |
| is designed for kids | No | — |
| Watch band is replaceable | Yes | — |
| Has sapphire glass display | No | — |
| has branded damage-resistant glass | No | — |
| Battery | ||
| charge time | 2 hours | — |
| battery life | 14 days | — |
| battery power | 300 mAh | — |
| has wireless charging | No | — |
| has a removable battery | No | — |
| battery life with GPS on | 16 hours | — |
| Has a solar power battery | No | — |
| has a rechargeable battery | Yes | — |
| battery life in training mode | 240 hours | — |
| battery life in power save mode | 720 hours | — |
| Sensors | ||
| has GPS | Yes | — |
| has a compass | Yes | — |
| Has a barometer | No | — |
| has a gyroscope | No | — |
| Has a cadence sensor | No | — |
| has an accelerometer | Yes | — |
| Monitors perspiration | No | — |
| Has a heart rate monitor | Yes | — |
| Has a temperature sensor | Yes | — |
| Monitors blood oxygenation levels | Yes | — |
| GPS | — | Yes |
| Compass | — | Yes |
| GLONASS | — | Yes |
| Galileo | — | Yes |
| Gyroscope | — | Yes |
| Thermometer | — | Yes |
| Accelerometer | — | Yes |
| SatIQ™ Technology | — | Yes |
| Barometric altimeter | — | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | — | Yes |
| Garmin Elevate™ wrist heart rate monitor | — | Yes |
| Features | ||
| release date | 2023-10-27 | — |
| Has a stopwatch | Yes | — |
| Has smart alarm | No | — |
| warranty period | 1 years | — |
| Has call control | Yes | — |
| Has silent alarm | Yes | — |
| has HRV tracking | Yes | — |
| internal storage | 0.25GB | — |
| Has notifications | Yes | — |
| Has ECG technology | No | — |
| Locates your phone | Yes | — |
| has fall detection | No | — |
| has voice commands | No | — |
| Acquires GPS faster | Yes | — |
| Has vibrating alerts | Yes | — |
| number of microphones | 1 | — |
| shows readiness level | Yes | — |
| Can be used to answer calls | Yes | — |
| measures resting heart rate | Yes | — |
| has irregular heart rate warnings | No | — |
| has fast/slow heart rate notifications | Yes | — |
| Has a built-in camera remote control function | No | — |
| Connectivity | ||
| has NFC | No | — |
| supports ANT+ | No | — |
| supports Wi-Fi | No | — |
| supports Galileo | No | — |
| Bluetooth version | 5.2 | — |
| has a cellular module | No | — |
| Is compatible with iOS | Yes | — |
| Is compatible with Android | Yes | — |
| Miscellaneous | ||
| Has passcode | Yes | — |
| Has auto pause | Yes | — |
| Is compatible with Windows | No | — |
| Is compatible with Mac OS X | No | — |
| has an external memory slot | No | — |
| Compatible with smart scales | Yes | — |
| has a battery level indicator | Yes | — |
| has a socket for a 3.5 mm audio jack | No | — |
| Compatible with external heart rate monitors | Yes | — |
| App & Software | ||
| Ad-free | Yes | — |
| Free app | Yes | — |
| Tracks BMI | Yes | — |
| Has coaching | Yes | — |
| Includes maps | Yes | — |
| Supports routes | Yes | — |
| Has achievements | Yes | — |
| Has goal setting | Yes | — |
| Has live tracking | Yes | — |
| Has exercise diary | Yes | — |
| Predicts ovulation | Yes | — |
| Can be personalised | Yes | — |
| Has weight tracking | Yes | — |
| Predicts start date | Yes | — |
| Tracks water intake | Yes | — |
| Has inactivity alerts | Yes | — |
| Has period notifications | Yes | — |
| Has temperature tracking | Yes | — |
| Provides activity reports | Yes | — |
| Displays fertile window notifications | Yes | — |
| Counts how many calories you've burned | Yes | — |
| Activity tracking | ||
| Measures pace | Yes | — |
| Tracks distance | Yes | — |
| Tracks elevation | Yes | — |
| Designed for golf | No | — |
| Tracks your sleep | Yes | — |
| Tracks steps taken | Yes | — |
| Designed for diving | No | — |
| Has a route tracker | Yes | — |
| Has exercise tagging | Yes | — |
| Tracks calorie intake | Yes | — |
| Provides sleep reports | Yes | — |
| Detects activities automatically | Yes | — |
| Has a stroke counter for swimming | Yes | — |
| Overview | ||
| Family | — | Garmin |
| General | ||
| Battery life | — | Smartwatch: Up to 28 days/Unlimited with solar* Battery Saver Watch Mode: Up to 65 days/Unlimited with solar* GPS Only: Up to 40 hours/130 hours with solar** All Satellite Systems: Up to 28 hours/50 hours with solar** All Satellite Systems + Multi-Band: Up to 24 hours/40 hours with solar*** Max Battery GPS: Up to 100 hours/Unlimited with solar** Expedition GPS: Up to 36 days/Unlimited with solar* *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 ***Solar charging, assuming use in 50,000 lux conditions; assuming typical use with SatIQ technology |
| Battery type | — | Lithium ion |
| Display Size | — | Custom, two-window design: 0.9” x 0.9” (23 x 23 mm) |
| Case material | — | fiber-reinforced polymer |
| Lens Material | — | Power Glass™ |
| Bezel Material | — | fiber-reinforced polymer/aluminum |
| Memory/History | — | 128 MB |
| Strap material | — | silicone |
| Charging method | — | Garmin proprietary plug charger |
| Display resolution | — | 176 x 176 pixels |
| QuickFit® watch band compatible | — | yes (22 mm) |
| Product Info | ||
| Main SKU | — | 010-02934-50 |
| Product ID | — | 1705221 |
| Product Name | — | Instinct® 3 – 45 mm, Solar, Tactical Edition |
| Release Date | — | 4/26/2025 |
| Product Variation | — | Black with Black Band |
| Clock Features | ||
| Timer | — | Yes |
| Stopwatch | — | Yes |
| Time/date | — | Yes |
| Alarm clock | — | Yes |
| GPS Time Sync | — | Yes |
| Sunrise/sunset times | — | Yes |
| Automatic daylight saving time | — | Yes |
| Gaming Features | ||
| Gaming Activity | — | Yes |
| GameOn™ app compatible | — | Yes |
| Cycling Features | ||
| Courses | — | Yes |
| MTB Grit & Flow | — | Yes |
| Race an activity | — | Yes |
| Power meter compatible | — | Yes |
| Advanced cycling dynamics | — | Yes |
| Compatible with Varia™ lights | — | Yes |
| FTP (Functional Threshold Power) | — | Yes |
| Speed and cadence sensor support (w/sensor) | — | Yes |
| Bike lap and lap maximum power (with power sensor) | — | Yes |
| Compatible with Varia™ radar (rear-facing radar) | — | Yes |
| Compatible with Vector™ and Rally™ (power meters) | — | Yes |
| Compatible with Varia Vision™ (head-mounted display) | — | Yes |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | — | Yes |
| Golfing Features | ||
| Tournament legal | — | Yes |
| Digital scorecard | — | Yes |
| Garmin AutoShot™ | — | Yes |
| Round timer/odometer | — | Yes |
| Auto CourseView updates | — | Yes |
| Yardage to layups/doglegs | — | Yes |
| Hazards and course targets | — | Yes |
| Pairs with Garmin Golf app | — | Yes |
| Green View with manual pin position | — | Yes |
| CT10 Automatic club tracking compatible (requires accessory) | — | Yes |
| Yardage to F/M/B (distance to front, middle and back of green) | — | Yes |
| Stat tracking (strokes, putts per round, greens and fairways hit) | — | Yes |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | — | manual |
| Running Features | ||
| Run workouts | — | Yes |
| Running power | — | Yes |
| Race predictor | — | Yes |
| Foot pod capable | — | Yes |
| Running dynamics | — | Yes |
| Lactate threshold | — | yes (with compatible accessory) |
| Grade-adjusted pace | — | Yes |
| Trail run auto climb | — | Yes |
| Performance condition | — | Yes |
| Run/Walk/Stand detection | — | Yes |
| Stride length (real time) | — | Yes |
| PacePro™ Pacing Strategies | — | Yes |
| Vertical oscillation and ratio | — | Yes |
| Ground contact time and balance | — | yes (GCT balance with accessory) |
| GPS-based distance, time and pace | — | Yes |
| Cadence (provides real-time number of steps per minute) | — | Yes |
| What You'll Love | ||
| Display type | — | Monochrome, sunlight-visible, transflective memory-in-pixel (MIP) |
| Water rating | — | 10 ATM |
| Garmin Pay™ | — | Yes |
| LED flashlight | — | Yes |
| Multi-band GPS | — | Yes |
| Solar Charging | — | Yes |
| Training status | — | Yes |
| Training readiness | — | Yes |
| Pulse Ox blood oxygen | — | Yes |
| Sleep score and insights | — | Yes |
| Battery life (smartwatch mode) | — | Up to 28 days/unlimited with solar |
| Activity Profiles | ||
| Gym | — | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing |
| Swim | — | Pool Swimming, Open Water Swimming |
| Cycling | — | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Wellness | — | Walking, Indoor Walking, Pilates, Yoga |
| Multisport | — | Triathlon |
| In the ring | — | Boxing, Mixed Martial Arts |
| Team sports | — | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| Motor sports | — | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| On the Water | — | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Water Skiing, Snorkeling, Wakeboarding, Wakesurfing, Tubing, Whitewater |
| Racket sports | — | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Snow & winter | — | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, XC Skate Skiing, Backcountry Skiing, Ice Skating, Snowshoeing |
| Indoor running | — | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | — | Running, Outdoor Track Running, Trail Running, Obstacle Racing |
| Outdoor recreation | — | Hiking, Rucking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery |
| Other activity profiles | — | Jumpmaster, Tactical, Inline Skating |
| Swimming Features | ||
| Pool swim workouts | — | Yes |
| Time and distance alerts | — | Yes |
| Auto rest (pool swim only) | — | Yes |
| Drill logging (pool swim only) | — | Yes |
| Countdown start (pool swim only) | — | Yes |
| Underwater wrist-based heart rate | — | Yes |
| "Repeat on" rest timer (pool swim only) | — | Yes |
| Basic rest timer (up from 0) (pool swim only) | — | Yes |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | — | Yes |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | — | Yes |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | — | Yes |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | — | Yes |
| Tactical Features | ||
| Kill switch | — | Yes |
| Stage timer | — | Yes |
| Stealth Mode | — | Yes |
| Ballistics solver | — | yes (unlock required) |
| Night vision mode | — | Yes |
| Dual grid coordinates | — | Yes |
| Outdoor Recreation | ||
| Tides | — | Yes |
| TracBack® | — | Yes |
| Sight 'N Go | — | Yes |
| Tide glance | — | Yes |
| Back to start | — | Yes |
| UltraTrac mode | — | Yes |
| Vertical speed | — | Yes |
| GPS coordinates | — | Yes |
| Reference point | — | Yes |
| Area calculation | — | Yes |
| Elevation profile | — | Yes |
| Projected waypoint | — | Yes |
| Total ascent/descent | — | Yes |
| Future elevation plot | — | Yes |
| Wind meter compatible | — | Yes |
| Distance to destination | — | Yes |
| Expedition GPS Activity | — | Yes |
| Sun and moon information | — | Yes |
| Point-to-point navigation | — | Yes |
| Bread crumb trail in real time | — | Yes |
| Barometric trend indicator with Storm Alert | — | Yes |
| Daily Smart Features | ||
| Calendar | — | Yes |
| Passcode | — | Yes |
| Connectivity | — | Bluetooth®, ANT+® |
| Garmin Share | — | Yes |
| Find My Phone | — | Yes |
| Find My Watch | — | Yes |
| VIRB® Remote | — | Yes |
| Morning report | — | Yes |
| Weather forecasts | — | Yes |
| Smart Notifications | — | Yes |
| Smart trainer control | — | Yes |
| Smartphone compatibility | — | iPhone®, Android™ |
| Controls smartphone music | — | Yes |
| On-device Connect IQ™ Store | — | Yes |
| Pairs with Garmin Connect™ Mobile | — | Yes |
| Compatible with Garmin Messenger app | — | Yes |
| Battery saver (customizable low power watch) | — | Yes |
| Realtime settings sync with Garmin Connect™ mobile | — | Yes |
| Text response/reject phone call with text (Android™ only) | — | Yes |
| Connect IQ™ (downloadable watch faces, data fields and apps) | — | Yes |
| Activity Tracking Features | ||
| TrueUp™ | — | Yes |
| Move IQ™ | — | Yes |
| Step counter | — | Yes |
| Floors climbed | — | Yes |
| Calories burned | — | Yes |
| Distance traveled | — | Yes |
| Intensity minutes | — | Yes |
| Automatic rep counting | — | Yes |
| Garmin Connect™ Challenges app | — | yes (optional Connect IQ app) |
| Move alerts (displays on device after a period of inactivity) | — | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | — | Yes |
| Workout and Training Plans | ||
| HIIT workouts | — | Yes |
| Yoga workouts | — | Yes |
| Cardio workouts | — | Yes |
| Pilates workouts | — | Yes |
| Strength workouts | — | Yes |
| Garmin Running Coach Experts | — | Yes |
| Garmin Coach - Prebuilt Cycling Plans | — | Yes |
| Daily Suggested Workout - Cycling (Pace and Heart Rate Based) | — | Yes |
| Daily Suggested Workout - Running (Pace and Heart Rate Based) | — | Yes |
| Health & Wellness Monitoring | ||
| Sleep | — | yes (advanced) |
| Hydration | — | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Breathwork | — | Yes |
| Fitness age | — | Yes |
| Sleep coach | — | Yes |
| Nap detection | — | Yes |
| All-day stress | — | Yes |
| Women's health | — | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Health snapshot | — | Yes |
| Respiration rate | — | Yes |
| Resting heart rate | — | Yes |
| Breathing variations | — | Yes |
| Relaxation reminders | — | Yes |
| Abnormal heart rate alerts | — | yes (high and low) |
| Relaxation breathing timer | — | Yes |
| Body Battery™ energy monitor | — | Yes |
| Wrist-based heart rate (constant, every second) | — | Yes |
| Safety and Tracking Features | ||
| Assistance | — | Yes |
| Live Event Sharing | — | Yes |
| Incident Detection during select activities | — | Yes |
| Incident detection alert on phone for wearables | — | Yes |
| Kid Activity Tracking Features | ||
| Toe-to-Toe™ Challenges app | — | yes (optional Connect IQ Toe-to-Toe™ Challenges app) |
| Training, Planning and Analysis Features | ||
| % HRR | — | Yes |
| % HR max | — | Yes |
| HR zones | — | Yes |
| HR alerts | — | Yes |
| Shortcuts | — | Yes |
| HRV status | — | Yes |
| Load ratio | — | Yes |
| Manual lap | — | Yes |
| Rest timer | — | Yes |
| Auto max HR | — | Yes |
| Auto scroll | — | Yes |
| Finish time | — | Yes |
| HR calories | — | Yes |
| Voice alerts | — | Yes |
| Custom alerts | — | Yes |
| Physio TrueUp | — | Yes |
| Recovery time | — | Yes |
| Training load | — | Yes |
| VO2 Max (Run) | — | Yes |
| Course guidance | — | Yes |
| Training effect | — | Yes |
| Virtual Partner | — | Yes |
| Workout benefit | — | Yes |
| Race an Activity | — | Yes |
| Advanced workouts | — | Yes |
| Interval training | — | Yes |
| Race glance/widget | — | Yes |
| Training load focus | — | Yes |
| VO2 Max (Trail Run) | — | Yes |
| GPS speed and distance | — | Yes |
| Improved recovery time | — | Yes |
| Configurable lap alerts | — | Yes |
| Customizable data pages | — | Yes |
| Unified training status | — | Yes |
| Touch and/or button lock | — | Yes |
| Activity history on watch | — | Yes |
| Multisport auto transition | — | Yes |
| Downloadable training plans | — | Yes |
| Training effect (anaerobic) | — | Yes |
| Manual multisport activities | — | Yes |
| HRM running pace and distance | — | Yes |
| Heat and altitude acclimation | — | Yes |
| Customizable activity profiles | — | Yes |
| Auto Pause® automatic timer halt | — | Yes |
| Respiration rate (during exercise) | — | yes (with compatible accessory) |
| Auto Lap® interval tracking feature | — | Yes |
| Primary benefit (Training Effect labels) | — | Yes |
| Power Modes - customizable in-activity battery settings | — | Yes |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | — | Yes |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | — | Yes |
Wrist Fit
Amazfit Active
Sits best on wrists ~38–51mm wide (≈ 10.1–13.6cm circumference).
Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
Frequently Asked Questions
Is the Amazfit Active bigger than the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition?
The Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition is bigger — 45mm vs 42.36mm case width.
Which fits a smaller wrist better, the Amazfit Active or the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition?
The Amazfit Active suits wrists around 38–51mm wide, and the Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition around 47–64mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Active and Garmin Instinct® 3 – 45 mm, Solar, Tactical Edition side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.