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Yes, a $99 GPS watch can cover essential marathon-training tasks—but the available evidence does not show that it handles them better than Garmin. The Amazfit Active 2 is a current example listed at $99 in the US by TechRadar’s 2026 guide. It offers GPS and training features, but the cited review does not give its battery life while recording GPS, and it was not tested head-to-head with a Garmin through marathon training. Compare the exact models and the features your training requires, not price alone.
What a $99 watch can—and cannot—be expected to do
For marathon preparation, a watch’s practical baseline is reliable GPS pace and distance, support for the workouts you plan to follow, and enough recording time for your longest runs and race day. The Amazfit Active 2 is one budget example: TechRadar’s 2026 guide lists it at $99 in the US, with GPS, workout features, up to 10 days of battery life, and 5ATM water resistance. The guide also reports reviewer testing of its GPS and heart rate. The 10-day battery figure is not identified as GPS-recording runtime. TechRadar’s 2026 running-watch guide
That makes the Active 2 a plausible candidate for essential training use, not a proven Garmin substitute for every runner. The cited material does not establish its GPS-mode battery duration or show how it compares with Garmin over a marathon training cycle.
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The Forerunner 165 is a useful Garmin comparator because Garmin publishes specific battery and training details for it. These are model-specific figures and features; they do not describe every Garmin watch.
#1 Best Overall
- Easy-to-use running watch monitors heart rate (this is not a medical device) at the wrist and uses GPS to track how far, how fast and where you’ve run.Special Feature:Bluetooth.
- Battery life: up to 2 weeks in smartwatch mode; up to 20 hours in GPS mode
- Plan your race day strategy with the PacePro feature (not compatible with on-device courses), which offers GPS-based pace guidance for a selected course or distance
- Run your best with helpful training tools, including race time predictions and finish time estimates
- Track all the ways you move with built-in activity profiles for running, cycling, track run, virtual run, pool swim, Pilates, HIIT, breathwork and more
| What to compare | Amazfit Active 2 | Garmin Forerunner 165 |
|---|---|---|
| Price in the cited source | $99 in the US, as listed by TechRadar’s 2026 guide. Prices and availability can change. Source | Not stated on Garmin’s cited product page. Source |
| Battery information | Up to 10 days, as reported by TechRadar; the cited passage does not specify GPS-mode runtime. Source | Up to 11 days in smartwatch mode, up to 19 hours in GPS-only GNSS mode, or up to 17 hours in all-systems GNSS mode, according to Garmin Singapore. Source |
| Running and training features described | GPS and workout features; the cited guide does not specify the same detailed feature set as Garmin. TechRadar reports reviewer GPS and heart-rate tests. Source | Built-in GPS, pace and distance, daily suggested workouts that adapt to performance and recovery, training effect, recovery time, and a marathon race predictor. Garmin describes Garmin Coach plans for 5K, 10K, and half-marathon distances—not a marathon plan. Source |
Smartwatch battery life and GPS recording time answer different questions. The Active 2’s reported “up to 10 days” should not be treated as 10 days of continuous GPS use. For a long run or marathon, look specifically for GPS-mode runtime and leave a margin for your expected time on course.
What the available accuracy tests actually show
TechRadar reports that its Active 2 testing found GPS accuracy comparable to an Apple Watch Ultra 2 and a heart-rate reading one beat per minute off in the tested comparison. Those are the publication’s reviewer findings, not a direct comparison with the Forerunner 165 or proof of consistent results across routes and conditions. TechRadar’s testing notes
Rank #2
- Built-in GPS for Accurate Outdoor Tracking – Tired of carrying a bulky phone during long runs? This GPS smartwatch tracks your real-time pace, distance, and routes with high precision, independently of your mobile device. This standalone tracking not only lightens your load during outdoor running, cycling or hiking but also preserves your phone’s battery life for emergencies. Whether navigating forest trails or urban marathons, stay focused on your performance with reliable, accurate data on your wrist.
- Bluetooth Calling & Smart Notifications – Still missing important calls while your phone is buried in your bag? With the integrated speaker and microphone, you can answer or dial calls directly from your wrist via Bluetooth. Stay updated with vibration alerts for texts and app notifications during intense workouts or busy commutes. This smart wrist companion ensures you remain reachable and informed without the need to constantly check your phone, making multitasking effortless and safer.
- Ultra-Clear 1.95" Full-Touch Screen – Struggling to read your stats mid-run? The expansive 1.95-inch HD display features enlarged fonts and vibrant color contrast for effortless visibility even under direct sunlight. Its responsive touch interface allows for seamless navigation through messages and health data, ensuring a frustration-free experience for active users who prioritize clarity and ease of use.
- Versatile Fitness Tracking with 100+ Sport Modes – Whether you are hitting the gym, cycling forest trails, or practicing yoga, this fitness watch adapts to your movement. It accurately captures real-time data across various activities, providing the motivation needed to hit your daily milestones. Perfect for fitness enthusiasts seeking a comprehensive log of their training intensity and progress.
- Comprehensive Daily Wellness Insights – Gain a better understanding of your body with continuous tracking of heart rate, blood oxygen, and daily activity levels. Monitor your steps and calorie burn throughout the day to stay aligned with your fitness goals. This wrist-based companion provides the essential data points to help you maintain a balanced and active daily routine.
GPS performance can vary with satellite position, surroundings, and device design. A 2022 paper by Joe Dumas examined three Garmin generations with one runner repeating one route; in that narrow study, the Forerunner 45S was less accurate in distance trueness and precision than the two older Garmin models tested. The study did not test Amazfit and does not establish a brand-wide ranking. Joe Dumas, 2022 study
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Neither source establishes that one of these watches will produce a better marathon result. A watch records and presents information; it does not, by itself, determine training quality or race performance.
Rank #3
- GPS Distance & Pace Tracking: Built-in GPS with fast signal lock tracks real-time pace, distance, route, and calorie burn. Best used in open outdoor areas for optimal GPS signal. Built-in altimeter and barometer for elevation and air pressure data. Digital compass for outdoor navigation. No phone needed, leave it at home and run light. Lap counter, interval timer, and stopwatch for track workouts and cross country training. Accuracy that rivals top-tier fitness trackers.
- Call, Text & SOS on Wrist: Fast Bluetooth pairing with iOS and Android. Receive calls, texts, and SMS reminders on your wrist. Built-in speaker and mic for hands-free calls. One-tap SOS emergency call for added safety. Voice assistant for quick commands. Displays weather and clock. Note: Bluetooth companion device, not a standalone phone.
- AMOLED Screen + 2 Bands: 2.06-inch square AMOLED display, razor-sharp and vivid even in direct sunlight. Large, easy-read numbers, no squinting or eye strain. Smooth touch response for quick swipes mid-workout. Shock-resistant metal body with military-grade toughness. 2 interchangeable bands: sporty silicone + soft fabric, fits wrists 5.5-8.5 inches. Unisex design available in navy, blue, silver, dark, white, and rose gold.
- 50m Waterproof Swim & 170+ Modes: 5ATM / 50m waterproof, handles pool laps, open water, rain, and heavy sweat. Swim mode tracks laps and stroke count, chlorine-resistant, zero fogging. 170+ sport modes: walking, hiking, biking, running, and more. Metal body built tough for outdoor work and fishing trips. Note: not for hot showers, diving, or high-velocity water sports.
- Calorie Step & Health Monitoring: 24/7 step counting tracks daily steps, distance, active calories, and daily activity. Heart rate sensor with abnormal heart rate alerts for added safety. Blood oxygen, stress, mood, and sleep monitoring for better health insights. Women's health tracking for period and cycle management. Suitable for men and women ages 16+, beginner to advanced.
Choose based on your training, not the logo
Before buying, check the exact watch against the demands of your own plan and routes:
- Long-run and race battery: Find the stated GPS-mode runtime, not only smartwatch-mode days. The Active 2’s cited 10-day figure does not answer this question.
- Route conditions: Consider where you run—open roads, tree cover, tall buildings, or repeated track laps can affect GPS measurements. Brand and price alone do not guarantee accuracy.
- Workout structure: Verify that the watch can create or follow the intervals, pace targets, or scheduled sessions you actually use. Garmin lists adaptive daily suggested workouts on the Forerunner 165; the cited Active 2 passage describes workout features without detailing an equivalent marathon-plan function.
- Training guidance: Decide whether training effect, recovery time, race prediction, or a particular coaching plan matters to you. The Forerunner 165 lists a marathon race predictor, while its named Garmin Coach plans are for 5K, 10K, and half-marathon distances.
- Heart-rate needs and run-time readability: If you train to heart-rate zones, consider how you will view and interpret that data while moving, and whether wrist-based readings meet your needs.
- Current price and availability: Treat the Active 2’s $99 as the US price reported in TechRadar’s 2026 guide, not a guaranteed price today.
Verdict: when the $99 option makes sense
The Amazfit Active 2 is worth considering if you want a lower-cost GPS watch for basic pace, distance, and workout use, and if its actual GPS battery runtime suits your longest sessions. The Garmin Forerunner 165 has more clearly documented running and recovery features in Garmin’s product information, including a marathon race predictor and specified GPS-mode battery figures. The evidence here is not enough to say the Active 2 is better than Garmin—or that it matches Garmin across a complete marathon build. Choose the model whose verified capabilities fit your plan, routes, and run duration.
Quick Recap
Best Value
- STYLISH DESIGN, VIBRANT DISPLAY: The lightweight aluminum build blends effortless style with workout durability, while the vivid 1.97" AMOLED display keeps your data easy to read, even under bright sunlight.
- ALL-IN-ONE ACTIVITY TRACKING: The Amazfit Bip 6 fitness tracker watch offers 140+ workout modes including HYROX Race and Strength Training, plus personalized AI coaching and 50m water resistance.
- UP TO 14 DAYS BATTERY LIFE: The Amazfit Bip 6 smart watch powers through your training and recovery for up to two weeks at a time - no nightly charging needed.
- ACCURATE GPS TRACKING & NAVIGATION: Stay on course with free downloadable maps and turn-by-turn directions. Support from 5 satellite systems ensures precise tracking of every move and fast GPS connection.
- 24/7 HEALTH MONITORING: The Amazfit Bip 6 smartwatch provides precise, real-time monitoring of heart rate, sleep, blood-oxygen and stress, empowering you with actionable insights to optimize your health and fitness.
Rank #4
- Easy-to-use running smartwatch with built-in GPS for pace/distance and wrist-based heart rate; brilliant AMOLED touchscreen display with traditional button controls; lightweight design in 43 mm size
- Up to 11 days of battery life in smartwatch mode and up to 19 hours in GPS mode
- Reach your goals with personalized daily suggested workouts that adapt based on performance and recovery; use Garmin Coach and race adaptive training plans to get workout suggestions for specific events
- 25+ built-in activity profiles include running, cycling, HIIT, strength and more
- As soon as you wake up, get your morning report with an overview of your sleep, recovery and training outlook alongside weather and HRV status (data presented is intended to be a close estimation of metrics tracked)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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