The round chassis of the Amazfit GTR 3 Pro is made out of aircraft-grade aluminum alloy and weighs only 32g. It is capped with a curved glass. There are two versions – Brown Leather (referring to the strap) with a light gray body and Infinite Black with a dark gray body and a black fluoroelastomer strap. The Pro has a larger display than before, 1.45”. It is very sharp (331 ppi) and very bright (peaking at 1,000 nits). The narrow bezels (70.6% screen-to-body ratio) means that the watch is the same size as the vanilla GTR 3 (1.39” display, 66% StB). Also, the refresh rate of the screen has been increased by 67%.
You can pick from over 150 watch faces and each face has a matching Always On Display version, which is simplified to reduce power usage. Some watch faces are editable, that is you can choose what widgets they display (heart rate, steps, weather, etc.). The watch has two buttons, though the top one is actually a crown. You can use it to scroll through menus and longer notifications.
With this generation of watches Amazfit is introducing Zepp OS, which features a revamped user interface. It’s not quite as powerful as Wear OS, but it does support third-party apps, which work on an app framework designed to reduce power usage. One of the 10 or so apps that already exist integrates with Home Connect, which is a cross-brand tool for controlling smart home gadgets. The company is in the process of creating a web-based app development kit, which will allow everyone to create their own watch faces and even apps (with tutorials to guide you through the process). These will be easy to share too, so you can share your creations with others and enjoy theirs too.
The watch can sync the health data that it tracks with Apple Health and Google Fit. It also works with popular apps like Strava, Relive, RunKeeper and others. Support for some of these will not be available at launch but instead will be added in the near future. As for the health features being tracked, the watch offers 24/7 heart rate and blood oxygen (SpO2) tracking. Measuring the blood oxygen level takes only 15s, almost half the time that second gen watches needed. Sleep tracking monitors the different stages of sleep and can even detect naps during the day. You can also enable an option that will track your breathing while you sleep.
The Amazfit GTR 3 Pro offers over 150 sports modes. It is 5 ATM water resistant, so you can take it swimming and for the first time it is even able to track your heart rate while in the pool. The Pro model supports satellite positioning based on the 5 major constellations, which increases the position lock time by 20% and increases accuracy by 40%. The watch can track VO2 Max, pace compared to previous runs, full recovery time and more.
The watch has a microphone and a speaker built-in, which allows you to answer calls. But you can also talk to Amazon’s Alexa as well as an offline assistant (which accepts commands in English, Spanish and German with no Internet connection). While the watch itself lacks an Internet connection (it relies on your phone for that), there are 2.3 GB of internal storage, so you can load in some music or podcasts to listen to while exercising outside.
Battery life is 12 days with normal usage, half that if you push the phone. The watch can last 35 hours of continuous GPS tracking. You can use Battery Saver Mode to stretch the time between charges to a full month.
