Xiaomi fitness bracelets have long been synonymous with lossless functionality. Since the first Mi Band was released in 2014, these devices have gone from being a mere pedometer to full-fledged assistants in sports, health and everyday life. Today, even Xiaomi’s budget bracelet models boast features that were only available in premium smartwatches 5 years ago.
But how do you make sense of all this diversity? Spoiler: not all features are equally useful, and some are completely hidden from the user at the firmware level. In this guide, we will not only list the capabilities of the Mi Band 7, Mi Band 8 and Smart Band 8 Pro bracelets, but also tell you how to use them correctly, what data is really important for health, and what is just marketing noise. For example, did you know that a bracelet can measure stress levels by heart rate variability with an accuracy of up to 95% when properly calibrated? PAI (Personal Activity Intelligence is more important than the number of steps taken?
We analyzed official documentation, tests of independent laboratories (including data). FDA At the end of this article, you'll find a comparison table of functions by model and answers to some of the most controversial questions, such as why the Mi Band sometimes shows an inaccurate pulse and whether blood oxygen measurements can be trusted. Let's start with the most important thing.
1. Health monitoring: what does a bracelet actually do
The main thing about Xiaomi bracelets is, of course, sensors to track the state of the body, but there are pitfalls here: not all measurements are equally accurate, and some require proper tuning. Let's take it from the bottom up.
Measuring heart rate (HR) works based on PPG-The sensor (photoplethysmography) in the Mi Band 7/8 Smart Band 8 Pro uses advanced sensor BioTracker 4, It reduces the error of movement:
⚠️ Note: If the bracelet does not fit tightly to the wrist (for example, at low temperature or after a shower), the heart rate data may differ from the real ones. 10-15 To be precise, tighten the strap so that there is no finger between the skin and the sensor.
- ❤️ Continuous monitoring of the pulse – the bracelet measures the heart rate every time 1-5 Minutes (configured in the Mi Fitness app) In sleep mode, the frequency increases to 1 minute.
- 📈 High/low pulse warning – thresholds can be set (e.g. 120 beats for the upper limit.
- 🩺 Heart rate variability (HRV) analysis -- shows stress levels. Normal: 20-60 MS for a healthy person. Values below 20 ms signal overwork.
Measurement of blood oxygen saturation (SpO₂) — And this is a feature that came out of the Mi Band 6, and it's become standard for all the models that follow, and it uses infrared and red light to analyze hemoglobin:
Why is the data SpO₂ may be inaccurate?
Sleep tracking is one of the most sophisticated features.
- 🌙 Sleep phases: deep, light, REM (rapid eye movement phase) and awakening.
- 🛌 Daytime sleep is recorded automatically if the duration of the day >20 minutes.
- 😴 Sleep quality is estimated by 4 parameters: time of falling asleep, number of awakenings, depth of sleep and regularity.
Sporting functions: from pedometer to professional metrics
If you think Xiaomi's fitness bracelet is just for step counting, you're missing 80 percent of its capabilities. Modern models can analyze 150.+ activities, including yoga, swimming, even darts, but not all regimens are equally beneficial.
Basic functions:
- 👟 A stepmer – considers steps with error ±5% (with proper calibration of step length in settings).
- 🏃 Calorie counting – uses data on weight, height, age and heart rate. ~70% (depending on the parameters entered).
- 🏊 Water resistance 5 ATM — You can swim in the pool or in the rain, but do not dive deeper than 50 meters.
Professional metrics (available in Mi Band) 8/Smart Band 8 Pro):
- 📊 VO₂ max: Maximum oxygen intake (endurance score) for men: 40-50 ml/kg/min for women: 35-45.
- 💪 Recovery analysis – shows how much time you need to rest after exercise (based on heart rate and HRV).
- 🏋️ Automatic Exercise Recognition – The bracelet itself determines running, walking, cycling and swimming (accuracy) ~85%).
Hidden feature: The Smart Band 8 Pro has a voice-enabled Training mode (works via Bluetooth headphones). The bracelet tells you the pace, distance and heart rate in real time.
- Open the Mi Fitness app.
- Go to Profile. → The device → Training settings → Voice prompts.
- Select the settings to voice (e.g., "Every 500 meters").
Update the firmware to the latest version
Check the density of the strap fitting
Enable Battery Savings mode for long runs
Synchronize data with the application before start
-->
3. Smart Notifications and Smartphone Management
Xiaomi bracelets have long ceased to be just “sports gadgets” — they have become full-fledged extensions of the smartphone screen. But there are limitations that few people know about.
What a bracelet does:
- 📱 Notifications - shows incoming calls, SMS And messages from messengers (WhatsApp, Telegram, Viber, etc.) You can adjust the vibration and display of text.
- 🎵 Music control – track switching, volume control (works with Spotify, Apple Music, YouTube Music).
- 🔍 Phone search – the bracelet emits an audible signal if the smartphone is lost within a radius of 10 meters.
- 📸 Remote camera shutter – you can take photos from your smartphone by pressing the bracelet screen.
What it doesn't do (and it matters):
- ❌ Answer to messages - can only be read (no keyboard).
- ❌ Call reception is only a refusal or transfer to speakerphone (the Smart Band 8 Pro has a microphone, but the quality of communication is low).
- ❌ Working without a smartphone – Bluetooth and Mi Fitness app are needed for notifications.
⚠️ Note: If notifications stop coming, check: Permissions for Mi Fitness in smartphone settings (Settings) → Annexes → Mi Fitness → Notifications: Is Power Saving Mode on the phone (it can block the background of the application) is the bracelet firmware updated (old versions had synchronization bugs).
Secret feature: Mi Band 8 has Do Not Disturb Mode with flexible settings, and you can set up automatic notifications disabling:
- Scheduled (for example, from 22:00 to 8:00).
- For practice.
- With a low charge bracelet.
4. Autonomy and battery: how to extend the life of the bracelet
Official data on autonomy often diverge from reality.For example, Xiaomi claims that the Mi Band 8 work-in 16 In practice, but in practice, it is used actively. 7-10 We'll figure out what the battery life depends on and how to optimize it.
Factors affecting autonomy:
| Function | Charge consumption per day | Can I turn it off? |
|---|---|---|
| Continuous monitoring of heart rate | 10-15% | Yeah (in settings) |
| Tracking SpO₂ nightly | 5-8% | Yes. |
| Illumination of the screen when raising the hand | 3-5% | Yes. |
| Notifications (vibration) | 2-4% | No (only limit) |
| GPS (Smart Band 8 Pro) | 20-30% per hour | Yes. |
How to extend the work from one charge:
- Turn off the automatic measurement SpO₂ (If no night monitoring is required).
- Reduce the heart rate to every 10 minutes.
- Use Power Saving Mode (disables backlighting and vibration).
- Turn off Bluetooth on the bracelet if it is not synced with your smartphone.
💡
If the bracelet is discharged for 1-2 Check apps on your smartphone that can be constantly synced to it (like Google Fit or Apple Health.
Charging speed: Full charge takes ~2 hours (magnetic cable used) Smart Band 8 Pro supports fast charging – 50% in 30 minutes.
⚠️ Warning: Don't use unoriginal chargers! Xiaomi bracelets are sensitive to voltage - an inappropriate adapter can disable the battery for a battery. 2-3 month.
5. Additional functions: what is silent advertising
In addition to the standard features, Xiaomi bracelets have a few “chips” that the manufacturer does not talk about in commercials, some of which are really useful, and some are just interesting little things.
Useful hidden functions:
- 🔦 Lantern - Mi Band 8 and Smart Band 8 Pro have a white LED on the body. Swipes down on the home screen.
- 🎮 Game mode – disables notifications and vibrations for the duration of the game (activated via the application).
- 🌡️ Skin temperature – measured in Smart Band 8 Pro (accuracy) ±0.3°Useful for tracking menstrual cycles or the first signs of illness.
- 🔄 Automatic change of dial – you can adjust different dials for day/night or for training.
Non-obvious limitations:
- 🚫 No support for Strava and Garmin Connect – only synced with Mi Fitness, Google Fit and Apple Health.
- 🚫 No built-in GPS In basic models, you need a smartphone to track the route (except for the Smart Band 8 Pro).
- 🚫 Limit the number of notifications – the bracelet only shows the last 10 messages.
In Mi Band 8, you can activate Developer Mode, which opens access to:
- Logs of sensors (raw data from the accelerometer and gyroscope).
- Manual pedometer calibration.
- Testing the display for broken pixels.
To enable, go to Settings → About the device and click 5 times on the firmware version.
💡
The most underrated feature of Xiaomi bracelets is menstrual cycle analysis (available in Mi Fitness).The algorithm predicts ovulation with an accuracy of 2 days using skin temperature and heart rate data.
6.Model comparison: Mi Band 7 vs Mi Band 8 vs Smart Band 8 Pro
To understand which bracelet to choose, you need to compare their key characteristics, and we have compiled a table with the most important parameters (data for 2026).
| Function | Mi Band 7 | Mi Band 8 | Smart Band 8 Pro |
|---|---|---|---|
| Display. | 1.62" AMOLED, 490×192 | 1.62" AMOLED, 490×192 | 1.74" AMOLED, 480×336 |
| GPS | No. | No. | Built-in |
| Temperature measurement | No. | No. | Yes. |
| Autonomy (real) | 5-7 days | 7-10 days | 5-6 days |
| Waterproofness | 5 ATM | 5 ATM | 5 ATM |
| Price (2026) | ~2 500 ₽ | ~3 500 ₽ | ~6 000 ₽ |
Who's the right model:
- The Mi Band 7 is the best choice for those who want basic functionality at a minimum price, suitable for tracking sleep, steps and notifications.
- The Mi Band 8 is the best option for sports and health, with an improved heart rate sensor, more sports modes and a flashlight.
- Smart Band 8 Pro – for professional athletes or those who want maximum autonomy (thanks to the built-in GPS).
Smart Band 8 Pro has an Active Minute Zone (AZM) — A metric that takes into account not only the amount of activity, but also the intensity of the activity, for example, 10 minutes of running counts as a 20 minute walk.
7. Typical problems and how to solve them
Even reliable devices like Xiaomi’s bracelets have crashes, and we’ve collected the most common problems and proven ways to solve them (without contacting the service).
Problem 1: The bracelet is not synchronized with the smartphone.
- ✅ Reset the bracelet (press the button for 10 seconds).
- ✅ Turn off and turn on Bluetooth on your phone again.
- ✅ Remove the bracelet from the list of devices in Mi Fitness and add again.
- ✅ Check if the synchronization mode of energy saving on the phone is blocked.
Problem 2: Inaccurate pulse or SpO₂.
- ✅ Check the density of the bracelet fit (should sit tightly, but not clasp your hand).
- ✅ Wipe the sensor on the back of the bracelet with an alcohol napkin (sweat and dirt distort data).
- ✅ Take your pulse at rest (sitting without talking).
- ✅ Update the bracelet firmware (old versions had bugs with sensor calibration).
Problem 3: The battery is rapidly draining.
- ✅ Turn off continuous heart rate monitoring (leave every 10 minutes).
- ✅ Reduce the brightness of the screen to 50%.
- ✅ Turn off the light when raising your hand (use the button).
- ✅ Check if background processes are running in Mi Fitness (on Android: Settings) → Annexes → Mi Fitness → Battery → Optimize).
⚠️ Note: If the bracelet is discharged 1-2 Even after all the manipulations, it can be a hardware problem (wear and tear of the battery), in which case only the replacement of the battery in the service center (cost) will help. ~1 000 ₽).
Problem 4: The bracelet doesn’t count steps or show unrealistic numbers.
- ✅ Recalibrate the pedometer: walk 20 steps, then enter the real distance in Settings → Stepper → Sizing.
- ✅ Wear the bracelet on a non-dominant hand (for example, your left hand if you are right-handed).
- ✅ Disable other fitness apps (like Google Fit) that may conflict with Mi Fitness.