Huami Amazfit Stratos Test - Sport Smartwatch 2 / 2S

by 3th of June 2019
The Amazfit Stratos is the current smartwatch of the Chinese producer Huami, who also produces wearables for Xiaomi. In addition to a stylish design, the Sport Smartwatch is equipped with all sorts of sports functions. Meanwhile, we were able to take a close look at the new Huami Amazfit smartwatch 2 or Stratos. More in the following review!



Amazfit Sport Smartwatch 2 / 2S (China)
Amazfit Stratos (Global)


Display: transflective
Display diagonal: 1.34 inches
Display resolution: 320 x 300 pixels

Processor and memory
CPU: Dual Core 1.2GHz
RAM: 512MB
Internal memory: 4GB
Memory extension: no

Bluetooth: 4.0 BLE
WiFi: 802.11 b / g / n
GPS: Yes
Pedometer: Yes
Heart Rate Monitor: Yes

OS: Android / iOS
Battery: 280 mAh

Amazfit Stratos (Smartwatch 2 / 2S)

The Amazfit Stratos, partly also under the name Amazfit Sport Smartwatch 2 was officially announced on 12. December 2017 released in China. The smartwatch has been released in a standard and a premium version. The smartwatch is from the Chinese Wearable manufacturer Huami who also produces wearables for Xiaomi.

In late February, 2018 is the sports watch in one International Version appeared. Apps specifically for the Chinese market have been removed and the user interface has been adapted in several languages.

Design, workmanship and delivery

Standard model vs. Premium model

Before we devote ourselves to all the features of the smartwatch, let's first look at the difference between the two Chinese models and the internationally published Amazfit Stratos. In China, that became standard model was named Xazy Smartwatch 2, the Premium model released as Amazfit Smartwatch 2S. Differences between both versions, there are only the display glass and the watch strap used. The standard model uses a conventional tempered display glass and a silicone wristband. The premium model, however, relies on sapphire crystal and a leather strap. The watch strap is interchangeable on both models.

International the watch has appeared as Amazfit Stratos. This is the standard Chinese model with custom UI. A premium version was not published for the international market!

Xiaomi Amazfit Stratos from the side

watch case

The Design The new Amazfit Smartwatch is completely different from the design of the Amazfit Pace, Overall, the watch case of the Amazfit Smartwatch 2 appears much more powerful in appearance, but is still based on a sporty style. The housing consists of carbon fiber reinforced plastic in the typical carbon look. The diameter is 4.8 cm, the height 1.5 cm and the weight of the smartwatch including watchband is exactly 60g.

On the upper side is the transflective display with 1.34 inch diagonal. The display is surrounded by a noble ceramic bezel. About three laterally placed Stainless steel pushbutton (316L), the Amazfit Stratos can be actively controlled. On the underside are the 4 pin charging connector and the slightly protruding heart rate sensor. The smartwatch can not be opened, which prevents access to the battery or internal hardware.

Amazfit Smartwatch 2 front with display

A clear advantage over the previous model is the Classification (protection class IP68) as waterproof to 5 bar (5 ATM / 50 meter). Under normal conditions it is thus possible to take a shower, to swim and to dive with the Smartwatch.

Watch strap and build quality

The silicone bracelet is adjustable in 15 steps and closed with a pin buckle. The tape length is 20 cm, the bandwidth measures 22 mm. A quick release facilitates the change of the bracelet.

The quality of workmanship The actual smartwatch is not objectionable. Criticisms reaps, however, the watch strap, which shows after a few weeks, slight signs of wear. Of the What's in the box In addition to the Amazfit Smartwatch 2 includes a charging station with USB port, and a user manual.

Amazfit Stratos included


"Transflective display"

The color display has a diagonal of 1.34 inches. The Resolution is 320 300 x pixels, Like the display of the Amazfit Pace, the new Amazfit Smartwatch 2 uses a so-called "Amazfit Smartwatch XNUMX" "Transflective display", This type of display does not require backlighting and reflects incident light. As "Always-On" If the display is permanently active, the display does not have to be switched on to read the time.

Find more Advantages of a transflective display Above all, the very good readability in sunshine and the low energy consumption. There are, however, too Disadvantages, such as a comparatively low viewing angle stability and a mostly pale color rendering. With a Touchscreen equipped, the operation of the smartwatch can be done not only on the side buttons, but also directly on the display.

Amazfit Smartwatch 2 display

The transflective display convinces in the test. Especially in sunshine or direct light, the display of the Amazfit Smartwatch 2 is very readable. Smartwatches with conventional LCD or AMOLED display is the Stratos ahead. In low light conditions, however, the readability decreases.


In order to be able to use the smartwatch in the dark, the display is also equipped with a Backlight equipped, which is activated at the push of a button or by lifting the arm. An ambient light sensor located below the display regulates the brightness of the backlight according to the ambient light. What you have to accept, are the sometimes pale colors that appear more or less strong depending on the light. The operation via the small touchscreen works well. Entries and swipes are detected precisely.

Display from the side

screen protector

The display of the Amazfit Smartwatch 2 is hardened by a display glass protected. The premium model (Smartwatch 2S) relies on higher quality sapphire glass. In the multi-week test, the conventional, hardened display glass proved to be extremely scratch-resistant and shock-resistant. Even an unintentional fall from 1.5 Meter, the smartwatch survived unscathed.


The internal hardware Features the Amazfit Stratos does not differ from its predecessor. Huami continues to rely on a dual-core processor that clocks up to 1.2 GHz, 512MB large memory and 4GB flash memory. Exhaustive 2GB of the internal flash memory already occupies the system, which is why the user only 2GB remaining space available. There is no memory expansion option!

Further hardware features are a WiFi module (802.11 b / g), a Bluetooth 4.0 module, a GPS module, a PPG heart rate sensor, an accelerometer, a gyroscope, a magnetic sensor, a barometer and an ambient light sensor.



Before deciding on the Amazfit Stratos, you should be aware that the Smartwatch initially appeared for the Chinese market. Since late February, the smartwatch is also available in an international version. Before buying, you should pay attention to which version you choose. Mostly, the Chinese model is cheaper, but also offers only a Chinese user interface. With knowledge, a Chinese model can also be converted into an international model with multilingual user interface on the software side!

Amazfit Watch app

To commissioning the smartwatch you need the Amazfit Watch appthat exists for both Android and iOS mobile devices. One drawback of the Chinese Stratos is that the Amazfit Watch app available in the respective app stores does not yet support the Chinese Amazfit Smartwatch 2. You can find a link to Chinese Amazfit app here:

The app itself adapts to the system language and is completely available in English on a smartphone with a German language setting. To use the app you need one Mi account, The connection between the app and the watch is via Bluetooth. A QR code with the connection data displayed on the watch and read out via the Amazfit Watch app facilitates the connection.

Flashing Custom ROM? Here the instructions!

Update: Meanwhile, resourceful developers multilingual custom ROMs released. The so-called "StratOS" ROM and the "STRATOSfied" ROM Translate the user interface into German, English and other languages. The following steps are necessary for flashing.

  1. Download the ADB and Fastboot drivers and install it. Generally valid drivers can be found on the net.
  2. Connect the watch to the PC. Open the Windows Command Prompt (CMD) and go with "cd" into the ADB folder. By entering "Adb devices" Do you see if the smartwatch has been detected correctly? With "Adb reboot bootloader" you switch to fast boot mode. Give afterwards "Fastboot getvar all" one to read all parameters. Save the parameters for the next step.
  3. Visit the page and follow the steps there Unlock the bootloader, Some of the previously retrieved parameters must be entered on the page. Wait until you receive an e-mail with a corresponding unlock code. Within the Windows command line and with active fast boot mode you are now wearing "Fastboot oem unlock" followed by your unlock code. With "Fastboot getvar unlocked" You can check if your bootloader is unlocked.
  4. Download the STRATOSfied (Link) or StratOS ROM (Link) down. After downloading, unzip all the files of the ROM you have chosen for into your ADB directory.
  5. For StratOS: Double click on the "Install.bat" you start the installation process. The process usually takes 8 to 10 minutes. The smartwatch must remain connected to the PC! After startup, the smartwatch is set to Italian by default. Within the settings you can also select English as the system language.
  6. For STRATOSfied: If you have chosen STRATOSfied, you have to go with it "Adb push" Copy all files to the sdcard directory of your watch. With "Adb root" you switch to the root mode. Then you change with "Adb shell" into a root shell. Give up there "Cd / sdcard /; sh "to start the installation process.

Features of the Amazfit Smartwatch 2

After we have dealt with the hardware, we now look at the Features of the Smartwatch closer to. Unlike many other China smartwatches, which are usually equipped with a native Android and thus allow the installation of other apps, the system of all Amazfit Watches is largely closed.

What You See Is What You Get - ie all "apps" or functions are permanently integrated into the system. Nevertheless, the Amazfit user interface offers all the necessary sports and everyday features to make the Amazfit Stratos an everyday companion. The structure of the user interface is clear, even if you must first familiarize yourself with the numerous functions and setting options at the beginning. The performance of the user interface is acceptable. Smaller hangers or less fluent animations are possible!

Pedometer and sports activities

The Amazfit Smartwatch 2 cleverly combines the design of a everyday watch with the functions of a sports wearables. Essential, of course, are the numerous Sports featureswhich, among other things in combination with a pedometer, a heart rate sensor and GPS capture a variety of user data. Choose from a total of 11 different activities, Here is an overview:

  • Running (outdoor)
  • Walking (Outdoor)
  • Cycling
  • Swimming (swimming pool)
  • Swimming (open water)
  • Running (indoor)
  • Cycling (indoor)
  • elliptical trainer
  • Mountaineering
  • Trail Running
  • Triathlon

Training modes

Every sport activity offers different Training modes and settings options, Among other things, training sessions recommended by the watch can be started, as well as the creation of individual training units within the Amazfit app. training objectives per unit can be specified in distance, calories, time or training effect (TE). The different setting options are characterized by the fact that, for example, for swimming activities, a pool length can be set, or that is for walking and running activities Geodata as GPX import to be able to run a given distance.

Sport activities

GPS and outdoor sports

If you start one Outdoor sports activity The watch first tries to find a GPS fix. This makes even more precise data acquisition possible. However, if one has opted for the Chinese model of the Amazfit Stratos, the clock lacks the European map data. In the evaluation, you will thus be shown the route, but a map display is missing (see screenshot)! As soon as the Smartwatch can also be connected to the international Amazfit app, the relevant card data will most likely be submitted later.


In addition to sports activities, the smartwatch also captures everyday movement. through Pedometer the daily steps are counted. A daily goal can be set individually. The steps also determine the distance covered and the calories burned. The pedometer convinces in practice. The step detection is precise. Incorrect measurements due to driving or other activities that do not represent a stepping motion do not occur.

Heart rate sensor and sleep monitor

To Heart rate measurement On the bottom of the smartwatch is a combination of photo diode and LED. The sensor measures the blood flow under the skin, which reflects the current heart rate. In addition to one Single measurement are also one interval measurement and continuous measurement possible. The accuracy of optical heart rate measurement should always be considered critically.

In the test, the measurement accuracy of the heart rate sensor was less convincing. Although a precise heartbeat rate is measured at rest, in the case of heavy exercise it comes to significantly different measurement results. To what extent Huami will accept this measurement inaccuracy will have to be shown. Other users report similar problems. For greater accuracy, the Smartwatch can also be connected to a heart rate chest strap!

The sleep monitor The Amazfit Smartwatch 2 is activated automatically and is not manually adjustable. Among other things, data on the time for falling asleep and recovery and the different phases of sleep are collected. The detection of the individual sleep times worked quite well in the test. Getting used to it, however, is to go to sleep with a rather large wristwatch.

Weather features and GPS

In terms of things too Weather To keep up to date, the user interface offers an 5 daily weather forecast. The respective location and the temperature unit can be adjusted in the Amazfit app. The respective weather is displayed with maximum and minimum temperatures.

Weather and heart rate

As mentioned earlier, the watch is also with a GPS module fitted. A GPS fix finds the clock quite fast. A likewise existing E-compass allows a precise reproduction of the direction of the compass. Further and also plausible measurement data are provided by the Amazfit Stratos, including air pressure and altitude above sea level.

Music, alarm clock and training plan

With the integrated Music player The watch can also be used for music playback. There are just under 2.56GB remaining memory available, which is regularly enough for 500 songs. Connected to a PC, songs can be copied to the memory of the watch and played via a connected Bluetooth headset. There is no radio function!

The alarm is similar to the alarm clock of a smartphone. You can create different profiles, as well as there is a snooze function. A vibration of the watch is the alarm. The vibration level can be set in 3 levels (Gentle, Mild, Strong). There is no such thing as a smart wake-up function that automatically awakens on the basis of the sleep phase.

The mode "Training Plan" 5 offers several weeks (56 days) training plans for beginners and professionals. Activating a training plan gives you daily guidelines for physical activity.

Stopwatch, timer and Mi Home

A classic stop function with intermediate time display is also available as an app. About one timer Individual or predefined periods can be measured. Also integrated "Mi Home"What different products of the Xiaomi ecosystem (eg lamps) can control.

Push notifications, screen unlock and others

The smartwatch is capable Push notifications a Bluetooth connected mobile device. For example, if you receive an app notification (WhatsApp or Facebook, a call or an SMS), you will be notified directly by the clock. The message content (text + emojis), even of several messages, is readable. There is no way to answer via the smartwatch directly! Which app is allowed to send notifications to the clock can be set within the Amazfit app.

Overview and notifications

The Screen unlock feature allows the smartwatch to be used as a secure unlock device. Within the security settings of the mobile device, the Stratos can be created as a trusted Bluetooth device. If you are now in the vicinity of the mobile device as a watch carrier, no PIN, pattern or password is required to unlock it.

Offizielle Updates receives the watch via the integrated WiFi module. For travelers, the clock offers one Flight modeso that the Amazfit Smartwatch 2 can also be used on the plane.

Amazfit Watch app

The Managing the smartwatch and the data collected by her is done via the Amazfit app, The home screen provides information about the current step count, battery, heart rate, and sleep.

Sports summary

On the Rider "Sport" you get to the sports overview. Here you can view the tracked sports activities with information on the duration, the average heart rate, the distance traveled, the steps and the calories burned. Sports activities can be filtered by days, weeks and months, as well as by activity. If you click on a sports activity, you will get a detailed overview of the respective measurement data.


On the Rider "Me" Smartwatch and App settings can be made, as well as the personal VO2max and EPOC Retrieve parameters. In the settings, for example, the widget arrangement can be adjusted. In addition, there are settings for real-time data collection of individual sports activities, as well as weather and notification settings can be made. With the help of an integrated file manager one has access to the file system of the clock.

Watch Faces

Watch Faces can be downloaded from a store that is also integrated into the app. The store did not really work in the test though. Alternatively, you can choose from 14 preinstalled digital and analogue watchfaces. The background pictures of individual watchfaces can be exchanged by own pictures. Own watchfaces can be played in .wfz format.

Overall, the app has a clear structure and offers numerous administration and configuration options. A Synchronization with Strava is not yet possible with the Chinese Stratos Smartwatch, because the Chinese Amazfit app, in contrast to its international counterpart, does not allow external synchronization of the data. However, the synchronization with the Mi Fit App is supported!


The Capacity of the battery gives Huami 280 mAh which also corresponds to the measured value. The runtime should be approximately 30 days with a daily movement activity of 5 minutes and a continuous receipt of push notifications. With active GPS and automatic heart rate monitoring, the running time is reduced to 35 hours (according to Huami).

Amazfit battery

In practice, the Term of Stratos at about 3 days, This value results from an activated heart rate measurement, a regular notification receipt and a daily 45 minutes sports program with activated GPS. For charging, the smartwatch is connected to the 4-Pin charging station. In the test, the charging station proved to be stiff, so the smartwatch had to be literally pressed into the dock. A complete one Battery charge takes 2 hours.


Huami is an 2014 based company that specializes in smart wearables and is now one of the world's largest wearable producers is to count. Huami became known primarily as a producer of Xiaomi Mi Band 2 and others too Xiaomi WearablesMost of them are produced by Huami and distributed by Xiaomi. Under the name "Amazfit" The manufacturer has its own product line, which is characterized by well-equipped and high-quality smart bands and smartwatches. The Amazfit Pace was the first Huami smartwatch that we also tested and was convincing by the transflective display, the lush functionality and the long lasting battery life. Other Huami wearables of the last months are the Amazfit Bip, a low-cost alternative to Amazfit Pace, as well as the Mi Band Alternative Amazfit Arc.

Price Comparison

You want to buy the Amazfit Stratos? In our price comparison we list the current offers of the most popular shops. All prices are checked and updated several times a day. Should a shop appear several times, it concerns the different warehouses of the dealer.

Price history

Current prices

10-30 working days
1-5 working days
10-30 working days
1-5 working days
Notebook cheaper
1-5 working days
1-5 working days
1-5 working days
1-5 working days
Buy geekbuying
10-30 working days

Price too high? Use our price alarm clock!

Prices last updated on: 2. July 2020 04: 01

Final Words


Everyday design
Good workmanship
IP68 water protection
Extensive sports functions
GPS, WiFi and Bluetooth
Transflective display
Accurate pedometer
Comprehensive app
Numerous watch faces
Acceptable battery life


Watch band with fast wear
Heart rate measurement in need of improvement
Minor performance drops

First impression
User Interface
GPS & sensors

The Huami Amazfit Smartwatch 2 is one of the most functionally comprehensive sports wearables on the market. With a total of 11 different sports activities and many individual settings options, the smartwatch is versatile. The pedometer impresses with its precise step detection. The accuracy of the heart rate measurement, however, is in need of improvement.

Even as an everyday clock, the Amazfit Stratos makes a good figure. Huami cleverly combines a sporty and elegant watch design. Through the transflective "always-on" display, the clock is readable at any time. Various and self-created Watchfaces provide more variety.

In direct comparison to the Amazfit Pace, however, the Amazfit Stratos is much more of a design upgrade. The hardware has remained identical to its predecessor and there are only a few new features on the software side. For the Amazfit Stratos, however, clearly the IP68 water protection speaks, which is why the Stratos is also suitable for swimming.

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Hopefully that comes with Android Wear.


So this is just a pace in the other design? I would have liked an upgrade on the hardware. Somehow disappointing the whole, but the design I like better than the pace. I stay first with my old and then switch to this, as soon as you can start something with the firmware.



Hi Timo, I liked your test for pace a lot. Will you also test the new one? I ask, because then I order here in the coming year and here would give the old to my wife ????


Hello, how exactly do you use the Stratos? Does it have a bezel like the Samsung Watch or how can I imagine?


Does the Huami Amazfit 2 (Stratos) have a built-in microphone or speaker? (Even though there are no software at the moment)


Are you sure to 100% that I can connect Stratos to an external heart rate chest strap (or even to the PolarOH1 = Pulse Sensor) via Bluetooth LE? And how does it work? Do I first need to call a sports feature and then pair it? Thank you in advance.


Hi Timo. Merci for the super fast answer.


Can I import a gpx file and use it in the training record to navigate? can one export the recorded training data if so in which data format and is the heart rate with it.


Thanks for the detailed answer, but I still have a question. Does the clock have an Auto Stop function which can be switched on and off?


I have to ask the following questions. Is the watch CE certified so that there are no problems with the import of the duty. The watch is available on the known sites at good prices and I am interested. However, I have something to worry about with a blow 140-160 Euro just so put in the sand. Unfortunately, I can not find any direct information about the certification for this watch. Do you have the opportunity to give me more information? Best regards


Hello, does that mean that if I buy the English version via Gearbest, do not I have to pay taxes?


Hi how is it when I have Spotify on the phone, I can control it with the clock? What about if I already have Bluetooth headphones on my phone? Then the clock is dormant?


I am wearing the STRATOS 2 (US version) since 1 week and I am very satisfied. The daily training runs, cycling, swimming are recorded accurately and in STRAVA all data is accessible and editable. When you start an activity, the GPS quickly finds a signal and the track recording is much more accurate than, for example, with an iPhone 7! The battery life is in my view for a sport watch outstanding: with 24h heart rate measurement, about 2-3 hours of training (running and swimming) with GPS and night sleeptracker holds the battery with me about 36 hours to shutdown. During the day, all messages are signaled and telephone calls are signaled with pleasant vibration. I pair a Bluetooth headset while running and occasionally an RF sensor - both work reliably and without problems. The operation of the STRATOS 2 is intuitive and, thanks to the very precise touch screen, much more pleasant than with a Garmin Fenix. And the significantly lower weight compared to Garmin makes the STRATOS 2... Continue reading "


Altimeter; This works when mountain biking and he counts the amount driven (one deduction departures) Thank you


Hi Timo, thanks for the detailed review. I really like the Amazfit Stratos, which is why I count the watch among my current favorites. But I have some questions. I hope you can help me with my decision.
1. I often read something about a Stratos 2. Are there different models of the clock or even a successor?
2. Is it easy to swap the watch strap?
3. Really waterproof?
4. Can I use Stratos for listening to music?

That would be for now. Would be great to hear from you.
LG Jenny


what is the difference between the model numbers A1619 and P182 in Stratos? Does anyone know that?


when he is a nederlandse handleiding bij was he he het beter


Hello Timo, nice report on the clock, which I also recently call my own 🙂
Maybe you can answer me yes the following question: I let me wake up with the clock on the arm daily by the alarm, but only partially succeed. I've noticed in the meantime that the clock should actually vibrate up to 5 minutes if you do not press for napping or quitting.
And now, what I can not explain to myself: If the clock starts to vibrate, it does it exactly 1 time 🙁 I have tested this once and set a test alarm. As soon as you touch the display with something (duvet, etc.) the alarm goes off. Of course, the awakening is not successful 🙁
Do you have a tip ?


The enclosed instruction manual is a joke, in English it is briefly explained how to register (compulsory), that's all. Otherwise you have to look at the operating instructions (also only in English) on the PC. Snapping the watch into the charging cradle is fiddling around. The operation is confusing and unintuitive. The display reacts poorly to tapping. For example, if you want to end a sporting activity, you keep tapping the display and don't know whether the watch is responding so slowly or has not registered the pressure at all, I had the impression that this behavior at low temperatures (outdoor sports in winter) was even worse becomes. The stopwatch can only be reset via the display and then taps around on the display until the button press has been registered. Why doesn't that work with one of the push buttons? After loading and updating the first sporting activity, an hour of cycling. The watch finds no GPS signal, over and over again... Continue reading "