Yes, a $99 GPS watch can cover the basics of marathon training—but the available evidence does not show that it handles those tasks better than Garmin. The Amazfit Active 2 is a concrete US$99 example, with GPS and workout features reported in TechRadar’s 2026 guide. But the cited review does not give its battery life while recording GPS or compare it with a Garmin through a marathon training cycle. The useful question is whether a specific watch meets your needs for long-run recording, workouts, and training feedback—not whether a lower price beats a brand.
What a $99 watch can do for marathon training
For most runners, the essential watch jobs are recording a route, showing pace and distance, and supporting the workouts in the training plan. The Amazfit Active 2 is a real budget option: TechRadar’s 2026 guide lists it at $99 in the US and reports GPS and workout features, along with reviewer testing of GPS and heart rate. That makes it a plausible candidate for basic training, not proof that it is equivalent to a particular Garmin model.
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TechRadar reported that the Active 2’s heart-rate reading was one beat per minute off in its tested comparison, and that its GPS accuracy was comparable to the Apple Watch Ultra 2 in the publication’s review. Those are reviewer findings from that test, not guarantees for every runner, route, or training block. The source does not establish Active 2 GPS-mode battery runtime or a direct marathon comparison against Garmin. TechRadar’s 2026 budget running-watch guide
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Garmin’s Forerunner 165 provides a useful model-specific comparison because its official product page spells out both training features and GPS-mode battery estimates. It lists 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 Coach plans on that page cover 5K, 10K, and half-marathon distances; that is not the same as a Garmin-provided marathon training plan.
#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
| Consideration | Amazfit Active 2 | Garmin Forerunner 165 |
|---|---|---|
| Price in the cited source | $99 in the US, as listed by TechRadar’s 2026 guide; price and availability can change. | Not stated on Garmin’s cited product page. |
| Battery figures | Up to 10 days reported by TechRadar; the cited passage does not identify this as GPS-mode runtime. | Up to 11 days in smartwatch mode; up to 19 hours in GPS-only GNSS mode; up to 17 hours in all-systems GNSS mode, according to Garmin Singapore. |
| Running and training features established by the cited source | GPS and workout features, as reported by TechRadar. | Built-in GPS, pace, distance, daily suggested workouts, training effect, recovery time, and marathon race predictor, according to Garmin. |
| Evidence about GPS accuracy | TechRadar reviewer reported GPS accuracy comparable to Apple Watch Ultra 2 in its test; no Garmin marathon comparison is given. | Garmin lists GPS features, but the product page does not establish a head-to-head accuracy result against the Active 2. |
Garmin’s battery figures illustrate why “up to 10 days” is not enough to judge long-run suitability: smartwatch time and continuous satellite recording are different measures. For the Active 2, the cited review does not provide the GPS-mode number needed for a direct endurance comparison. Check the exact model’s GPS recording estimate and allow a margin for your longest runs and race day. Garmin Forerunner 165 specifications
Does Garmin have better GPS accuracy?
Neither price nor brand alone proves which watch will record your routes more accurately. GPS measurements can vary with satellite positions, surroundings, and device design. A 2022 study by Joe Dumas examined three Garmin generations with one runner repeating one route; within that narrow test, the Forerunner 45S was less accurate in distance trueness and precision than the two older Garmin models. It did not test Amazfit, and it cannot establish a brand-wide ranking or settle an Active 2-versus-Forerunner 165 comparison.
Rank #2
- No APP & Phone Required Fitness Tracker Watch: This Fitness Tracker watch doesn't require any App or smartphone connections! It's as simple to use as a regular watch but smarter. Perfect for anyone looking for an easy fitness tracker without the hassle of smartphone setups.
- Heart Rate and Sleep Monitoring: The Fitness Tracker monitors your heart rate automatically all day, and you can select manual mode through the App. The fitness Watch also monitors your sleep at night, providing a detailed analysis of your sleep quality (deep sleep, light sleep, awake time). It is a health advisor for women men in daily life.
- Multi Sport Modes with Activity Tracking: The fitness tracker features 9 sport modes like running, walking and more. Additionally, the activity tracker records daily steps, calories burned, walking distance and active time throughout the day. You can also set a daily steps goals through the App to track your progress.
- Smart Notification Reminder: You can get SMS messages, and SNS notifications directly on your wrist including Facebook, Twitter, Gmail ect. You won't miss any important calls and message and stay updated. Please note: the smart watch can not make calls or text.
- Long Battery Life and IP68 Waterproof: This smart watch only requires 2 hours of charging and can be used for 5-7 days continuously, IP68 waterproof rating can withstand daily sweat, washing hands and rainy day, allowing you to fully enjoy your workouts.
TechRadar’s Active 2 result is encouraging for that review’s test conditions, but it is not evidence that the watch will match Garmin on your routes across a full marathon plan. If distance consistency matters, compare how the exact models perform on the routes you actually run and consider whether you need more than wrist-based pace and distance. Joe Dumas’s 2022 GPS-watch study
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- Check GPS-mode battery life. Find the manufacturer’s estimate for continuous GPS recording, not just smartwatch-mode or general battery life. Compare it with the time you expect to spend on your longest run and race day.
- Match workout support to your plan. Confirm that the watch can create or follow the intervals, pace targets, or other structured sessions you use. “Workout features” alone does not specify which workout types are supported.
- Decide how much training feedback you need. If daily adaptive workouts, recovery time, training effect, or a marathon race predictor matter to you, verify that the exact model includes them. Garmin lists those features for the Forerunner 165; the cited Active 2 review does not establish an equivalent feature set.
- Consider your routes and heart-rate needs. Trees, buildings, and other environmental conditions can affect GPS measurements. If you train by heart rate, treat a single reviewer’s result as one data point, and verify compatibility before choosing an external sensor.
- Compare current prices only after the fit check. TechRadar listed the Active 2 at $99 in the US in its 2026 guide. That price is time- and market-specific, not a promise of current availability.
Does either watch make marathon training more successful?
The cited product specifications and limited device testing do not show that choosing one watch causes better marathon performance. A watch can make training data easier to collect and interpret; it does not replace a suitable plan, consistent training, or sound pacing. Choose the lower-cost option if its GPS recording endurance, workout support, and feedback fit your use. Pay more only for specific capabilities you will actually use—not on the assumption that Garmin’s name or a higher price guarantees better results.
Quick Recap
Best Value
- 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 (5 days display always-on)
- 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)
Rank #4
- Contrast Case Build: A 38mm gray and black resin case pairs with an adjustable 18mm strap for secure, everyday training wear
- Serious Performance: A 100-hour chronograph with 30-lap memory and a 24-hour countdown timer support training days, while three customizable alarms keep you on schedule
- Stay on Schedule: Two time zones and a full day, date and month calendar keep every plan on track wherever the day takes you
- Night-Ready Visibility: An acrylic lens and INDIGLO backlight keep the digital display easy to read after dark, day or night
- Built to Last: A Timex watch is designed for durability and everyday reliability; every piece reflects our commitment to quality without compromise
Rank #3
- 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)
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