Why we like it
- Dual-band GPS is rare at this price and locks on quickly.
- Sharp 1.75" AMOLED with always-on options and custom complications.
- 150+ sports modes with auto-detection for walking and running.
What to know
- Third-party apps are limited to Zepp's own catalogue.
- Call quality on the built-in speaker is best indoors.
- Heart-rate spikes can lag during fast intervals compared to a chest strap.
Best for
- Buyers who want premium looks and specs under $200.
- Outdoor walkers and runners who value quick GPS lock.
- Offline music playback via Bluetooth headphones (local MP3).
Performance notes
GPS & accuracy
Dual-band positioning handled tree cover better than the GTS 3, with only minor smoothing around tall buildings. Average deviation on a measured 5K route was 0.06 km.
Fitness tracking
Step counts ran within 3% of an iPhone 15 Pro, and auto-detected walks logged promptly. Interval heart-rate data matched a Polar H10 except during sudden sprints, where it lagged by a few seconds.
Battery life
With always-on disabled and 3 GPS sessions per week, we hit 7-8 days. Always-on plus dual-band GPS drops endurance to around 4 days. A full charge took roughly 1 hour with the magnetic puck.
Smart features
Zepp OS offers offline voice assistant, calendar, Pomodoro timer, and basic apps. Music works via local file transfer; there is no Spotify download support.
Key specs
Display
1.75" AMOLED
Weight
27g (without strap)
GPS
Dual-band
Water rating
5 ATM
Sports modes
150+
Price at review
$199 / £189
Pros & cons
Pros
- Dual-band GPS and offline music at a budget price.
- Lightweight design with comfortable fit for sleep tracking.
- Responsive AMOLED with customizable always-on faces.
Cons
- Zepp app store lacks big-name apps and streaming music.
- Speaker volume is quiet outdoors for calls.
- Heart-rate lag during sudden sprints.
Verdict
A premium-feeling smartwatch that delivers strong fitness tracking without stretching your budget.
The Amazfit GTS 4 proves you can get dual-band GPS, AMOLED visuals, and long battery life under $200. If you can live without Spotify downloads or a rich app store, it's one of the best-value wearables right now.