Last Updated & Fact Checked: March 21, 2026
Are you trying to decide between the Garmin Forerunner 45 42mm and the Garmin Vivoactive 3?
Product Versus will provide you with all the product details so you can quickly compare the facts to find which product is right for you – the Garmin Forerunner 45 42mm or the Garmin Vivoactive 3 – and find out exactly what the differences are.
Both the Garmin Forerunner 45 42mm and the Garmin Vivoactive 3 are quality products, so read on to find out which one is best for your needs!
Garmin Forerunner 45 42mm quick facts
Garmin Vivoactive 3 quick facts
Garmin Forerunner 45 42mm product details
Bestseller No. 1
Garmin 010-02156-05 Forerunner 45, 42mm Easy-to-use GPS Running Watch with Coach Free Training Plan Support, Black
- Gps running watch with Garmin Coach training plan support.Supported Application:GPS,Fitness Tracker,Heart Rate Monitor,Sleep Monitor,Music Player. Connectivity technology:GPS. Wireless comm standard:Bluetooth
- Easy to use running watch estimates heart rate at the wrist and features GPS to track your pace, distance, intervals and more
- Works with free Garmin coach adaptive training plans that bring expert, personalized coaching right to your wrist
- Connected features include smart notifications for incoming texts and calls, automatic uploads to our Garmin connect online community, live tracking and controls for the music playing on your paired compatible smartphone
- Safety and tracking Features include incident detection (during select activities) which sends your real time location to emergency contacts through your paired compatible smartphone
Bestseller No. 2
Garmin® Forerunner® 570, 42mm, Advanced GPS Running and Triathlon Smartwatch, AMOLED Display, Training and Recovery Features, Slate Gray Aluminum with Translucent Black/Black Band
- Our brightest AMOLED touchscreen display with button controls and an aluminum bezel in 42 mm size to fit smaller wrists
- Up to 10 days of battery life in smartwatch mode and up to 18 hours in GPS mode for a more complete picture of your training and recovery
- Train for an event, achieve a milestone, or improve your fitness with Garmin Coach training plans; these running and triathlon plans are personalized to you and adapt based on your performance and recovery
- Training readiness score is based on sleep quality, recovery, training load and HRV status to determine if you’re primed to go hard and get the most out of your workout (data presented is intended to be a close estimation of metrics tracked)
- Built-in microphone and speaker let you make and take phone calls from your wrist when your watch is paired to your smartphone — and you can even use your smartphone’s voice assistant to respond to text messages and more
Bestseller No. 3
Watbro Compatible with Garmin Forerunner 45 band, Soft Silicone Sport Replacement Watch Band, Fitness Strap Bracelet Wristband for Garmin Forerunner 45 Smartwatch
- ✓【Compatible Models】- This replacement silicone band ONLY compatible with Garmin Forerunner 45 Smart Watch. NOT for Forerunner 45S watch or any other models.
- ✓【Install & Adjust Simply】- Screws and screw drivers are free provided to install, very easy to put it on and remove. Free size fits most wrists (5.5"-8.1"/ 139mm-206mm), with plenty of spots for size adjustment.
- ✓【Environmental Material】- Using high quality soft silicone material, which is soft and durable. Protecting your Garmin Forerunner 45 from dirt and scratches. Fit securely for running, dancing or working out, perfect for daily and nightly wear.
- ✓【Various Colors】- Delighted varied colors personalize your wristband to fits your mood and outfits in daily life. Personalized Your Garmin Forerunner 45 Smart Watch with this refined replacement wristband.
- ✓【Secure Design】- The connect part locks onto the Forerunner 45 watch precisely and securely, the metal clasp works well in holding the device in place. Enjoy your sports activities with them.
Garmin Vivoactive 3 product details
Bestseller No. 1
Smartwatch GARMIN Vivoactive 3 1,2in GPS Waterproof 5 ATM Glonass Black Stainless Steel (Renewed)
- Computers | Electronics, Electronics | Phones & tablets, Smartwatches
- Wireless communication technology, Bluetooth
- Package Dimensions, 8.2 L x 16.9 H x 16.4 W (centimeters)
Bestseller No. 2
Garmin Vívoactive 5, Health and Fitness GPS Smartwatch, AMOLED Display, Up to 11 Days of Battery, Slate Aluminum Bezel with Black Case and Silicone Band
- Designed with a bright, colorful AMOLED display, get a more complete picture of your health, thanks to battery life of up to 11 days in smartwatch mode
- Body Battery energy monitoring helps you understand when you’re charged up or need to rest, with even more personalized insights based on sleep, naps, stress levels, workouts and more (data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching for how much sleep you need — and get tips on how to improve plus key metrics such as HRV status to better understand your health (data presented is intended to be a close estimation of metrics tracked)
- Find new ways to keep your body moving with more than 30 built-in indoor and GPS sports apps, including walking, running, cycling, HIIT, swimming, golf and more
- Wheelchair mode tracks pushes — rather than steps — and includes push and handcycle activities with preloaded workouts for strength, cardio, HIIT, Pilates and yoga, challenges specific to wheelchair users and more (data presented is intended to be a close estimation of metrics tracked)
Bestseller No. 3
Garmin vívoactive 3 GPS Smartwatch - White & Stainless (Renewed Premium)
- There will be no visible cosmetic imperfections when held at an arm’s length. There will be no visible cosmetic imperfections when held at an arm’s length.
- This product will have a battery which exceeds 80% capacity relative to new.
- This product is eligible for a replacement or refund within 1-Year of receipt if it does not look like new or work as expected.
New products & alternatives to the Garmin Forerunner 45 42mm and the Garmin Vivoactive 3
New
Garmin Venu 4, 45mm, Advanced Fitness Tracker GPS Smartwatch, 1.4" AMOLED Display, Built-in Flashlight, 12 Days of Battery Life, Slate with Black Silicone Band (Watch Bundle)
- Bundle Includes: Garmin Venu 4, 45mm, Advanced Health and Fitness GPS Smartwatch, Slate with Black Silicone Band + USB3.0 to type-c female adapter Space Gray + USB Wall Charger + 6Ave Microfiber Cleaning Cloth
- DISPLAY & DESIGN BUILT FOR DAILY WEAR: Garmin Venu 4 GPS Fitness and Health Smartwatch features bright 1.4-inch AMOLED, framed by a lightweight 45 mm metal design that’s comfortable from commute to workout. A built-in LED flashlight adds quick illumination for night runs or gear checks. Personalize your look with customizable watch faces, color filters and adjustable font sizes, and keep things practical with timers, a stopwatch, focus modes and a clean, durable build made for everyday use.
- TRAINING TOOLS FOR EVERY SPORT: Venu 4 Smartwatch offers 80+ GPS and indoor apps for running, cycling, strength, yoga, Pilates, golf and more. Follow Garmin Coach plans that adapt to your pace and schedule, or get daily suggested workouts tailored to recent effort. Track strength sessions with rep, set and rest timers, try animated on-screen routines, switch activities mid-session, and use triathlon, multisport, rucking and wheelchair profiles to match how you move.
- PRECISION GPS & PRO GUIDANCE: Multi-band GPS with SatIQ helps lock in strong positioning while optimizing battery life. Load or create courses and follow turn-by-turn directions, use Track Running for accurate lap distances, and plan race strategy with PacePro. Runners can view cadence, stride length, ground contact time and on-wrist running power to fine-tune form. When paired with your phone, get Google Maps turn-by-turn guidance right on your wrist.
- SMART FEATURES & LONG BATTERY: Go up to 12 days in smartwatch mode. Download playlists from Spotify, Deezer or Amazon Music for phone-free listening. When paired, make and take calls, use voice commands, and reply to texts (Android or via Garmin Messenger). Breeze through checkout with Garmin Pay and transit fares, stay on top of notifications and calendar events, and share activities in the Garmin Connect app. Safety tracking lets friends follow your location during activities.
New
Garmin Venu 4, 45mm, Advanced Fitness and Multisport Tracker GPS Smartwatch, 1.4" AMOLED Display, Built-in Flashlight, 12 Days of Battery Life, Slate with Brown Leather Band
- Bundle Includes: Garmin Venu 4, 45mm, Advanced Health and Fitness GPS Smartwatch, Slate with Brown Leather Band + USB3.0 to type-c female adapter Space Gray + USB Wall Charger + 6Ave Microfiber Cleaning Cloth + P-Bank Battery + Air Pro TWS Truly Wireless EarBuds - (Color May Vary)
- DISPLAY & DESIGN BUILT FOR DAILY WEAR: Garmin Venu 4 GPS Fitness and Health Smartwatch features bright 1.4-inch AMOLED, framed by a lightweight 45 mm metal design that’s comfortable from commute to workout. A built-in LED flashlight adds quick illumination for night runs or gear checks. Personalize your look with customizable watch faces, color filters and adjustable font sizes, and keep things practical with timers, a stopwatch, focus modes and a clean, durable build made for everyday use.
- TRAINING TOOLS FOR EVERY SPORT: Venu 4 Smartwatch offers 80+ GPS and indoor apps for running, cycling, strength, yoga, Pilates, golf and more. Follow Garmin Coach plans that adapt to your pace and schedule, or get daily suggested workouts tailored to recent effort. Track strength sessions with rep, set and rest timers, try animated on-screen routines, switch activities mid-session, and use triathlon, multisport, rucking and wheelchair profiles to match how you move.
- PRECISION GPS & PRO GUIDANCE: Multi-band GPS with SatIQ helps lock in strong positioning while optimizing battery life. Load or create courses and follow turn-by-turn directions, use Track Running for accurate lap distances, and plan race strategy with PacePro. Runners can view cadence, stride length, ground contact time and on-wrist running power to fine-tune form. When paired with your phone, get Google Maps turn-by-turn guidance right on your wrist.
- SMART FEATURES & LONG BATTERY: Go up to 12 days in smartwatch mode. Download playlists from Spotify, Deezer or Amazon Music for phone-free listening. When paired, make and take calls, use voice commands, and reply to texts (Android or via Garmin Messenger). Breeze through checkout with Garmin Pay and transit fares, stay on top of notifications and calendar events, and share activities in the Garmin Connect app. Safety tracking lets friends follow your location during activities.
New
Garmin Venu 4, 45mm, Advanced Fitness and Multisport Tracker GPS Smartwatch, 1.4" AMOLED Display, Built-in Flashlight, 12 Days of Battery Life, Silver with Citron Silicone Band (Watch Bundle)
- Bundle Includes: Garmin Venu 4, 45mm, Advanced Health and Fitness GPS Smartwatch, Silver with Citron Silicone Band + Citron, WW + USB3.0 to type-c female adapter Space Gray + USB Wall Charger + 6Ave Microfiber Cleaning Cloth + P-Bank Battery + Air Pro TWS Truly Wireless EarBuds - (Color May Vary)
- DISPLAY & DESIGN BUILT FOR DAILY WEAR: Garmin Venu 4 GPS Fitness and Health Smartwatch features bright 1.4-inch AMOLED, framed by a lightweight 45 mm metal design that’s comfortable from commute to workout. A built-in LED flashlight adds quick illumination for night runs or gear checks. Personalize your look with customizable watch faces, color filters and adjustable font sizes, and keep things practical with timers, a stopwatch, focus modes and a clean, durable build made for everyday use.
- TRAINING TOOLS FOR EVERY SPORT: Venu 4 Smartwatch offers 80+ GPS and indoor apps for running, cycling, strength, yoga, Pilates, golf and more. Follow Garmin Coach plans that adapt to your pace and schedule, or get daily suggested workouts tailored to recent effort. Track strength sessions with rep, set and rest timers, try animated on-screen routines, switch activities mid-session, and use triathlon, multisport, rucking and wheelchair profiles to match how you move.
- PRECISION GPS & PRO GUIDANCE: Multi-band GPS with SatIQ helps lock in strong positioning while optimizing battery life. Load or create courses and follow turn-by-turn directions, use Track Running for accurate lap distances, and plan race strategy with PacePro. Runners can view cadence, stride length, ground contact time and on-wrist running power to fine-tune form. When paired with your phone, get Google Maps turn-by-turn guidance right on your wrist.
- SMART FEATURES & LONG BATTERY: Go up to 12 days in smartwatch mode. Download playlists from Spotify, Deezer or Amazon Music for phone-free listening. When paired, make and take calls, use voice commands, and reply to texts (Android or via Garmin Messenger). Breeze through checkout with Garmin Pay and transit fares, stay on top of notifications and calendar events, and share activities in the Garmin Connect app. Safety tracking lets friends follow your location during activities.
New
PlayBetter Garmin Venu 4 (Silver/Silver Gray, 45mm) Fitness GPS Smartwatch Bundle - AMOLED Display, Built-in Flashlight, Long Battery Life Portable Charger & HD Screen Protectors
- All-Day Health Tracking: Keep tabs on heart rate, stress, blood oxygen, respiration, hydration, and more. Body Battery monitoring shows the best times to move or rest so you can maximize energy throughout the day.
- Better Sleep, Better Days: Personalized sleep metrics and the sleep alignment feature reveal how well your rest matches your natural rhythms, helping you wake up refreshed and ready to perform.
- Train Smarter, Perform Stronger: Garmin Coach training plans, daily workout suggestions, animated on-screen exercises, and 80+ built-in sports apps including adaptive workouts for wheelchair users, keep fitness fun and motivating.
- Smart Connectivity on Your Wrist: Pair with your smartphone to make and take calls, send texts, view app notifications, and access safety features all without pulling your phone from your pocket.
- Ultimate Fitness Bundle: Garmin Venu 4 Fitness Smartwatch, PlayBetter #Z05 5000mAh Powerbank, HD Screen Protectors & USB Charging Cable
New
Garmin Venu® 4, 45mm, Advanced Health and Fitness GPS Smartwatch, Bright and Colorful Display, Built-in Flashlight, 12 Days of Battery Life, Slate with Black Silicone Band
- Smartwatch with a bright, colorful display, stainless steel design, and built-in flashlight; up to 12 days of battery life gives a more complete picture of your health
- Make improvements to promote a healthier lifestyle and know your body better with extensive health monitoring features, including wrist-based heart rate, Body Battery energy monitoring, fitness age, stress tracking, meditation and more (device data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching, including recommendations for how much sleep you need, tips on how to improve, alignment on your inner sleep cycle by using circadian rhythm and more; breathing variations feature uses Pulse Ox to check your level of variations while sleeping (this is not a medical device, and device data presented is intended to be a close estimation of metrics tracked; Pulse Ox is required and not available in all countries)
- The health status feature looks for changes in your health data that could indicate added stress to your body for key metrics — such as heart rate, HRV, skin temperature and more — which could be related to factors such as physical activity, potential illness or other health changes (device data presented is intended to be a close estimation of metrics tracked)
- Log custom or preset daily behaviors — such as caffeine and alcohol intake — and view reports in the Garmin Connect smartphone app on how lifestyle choices may impact your sleep, stress and HRV to help you make more health-conscious decisions (device data presented is intended to be a close estimation of metrics tracked)
Our conclusion on the Garmin Forerunner 45 42mm vs Garmin Vivoactive 3
Both the Garmin Forerunner 45 42mm and the Garmin Vivoactive 3 are high quality products and we are sure you will be happy with either one. In the end it comes down to your budget and the value for money you are looking for.
Either way, the Garmin Forerunner 45 42mm and the Garmin Vivoactive 3 are both excellent products that will more than do their job!