In this post, we compare specs and features of these two head-to-head, the Mi Band 4 vs 3 – what’s the difference? Find out if an upgrade is necessary?
Just after a year the Mi band 3 was released, the Mi band 4 follows up as its successor. It was released in china last week, and as seen, the new Band 4 is quite more stylish and features a more interactive AMOLED display ditching the monochrome OLED of its predecessor, and as well builds on the remarkable impressive battery life of the Band 3.
Mi Band 4 vs 3 Specifications Compared
| Mi Band 4 | Mi Band 3 | |
|---|---|---|
 |  | |
ABOUT DEVICE | ||
| Device name | Mi Band 4 | Mi Band 3 |
| Device type | Fitness smartband | Fitness smartband |
| Predessesor | MI BAND 3 | Mi band 2 |
| Successor | Mi Band 5 | Mi Band 4 |
| Released date | June, 2019 | May, 2018 |
| Ideal for | Unisex | Unisex |
DISPLAY | ||
| Display type | AMOLED (400nits) | OLED (monochrome) |
| Display size | 0.95 inch | 0.78 inch |
| Display resolution | 240 x 120 pixel | 128 x 80 pixel |
| Pixel density | _ | _ |
| Input type | Touchkey | Touchkey |
| Always-on | Yes | Yes |
| Customizable watch face | Yes | Yes |
BODY | ||
| Shape | Rectangular/curved | Rectangular/curved |
| Dimension | 47 x 21.6 x 10.8 mm | 17.9 x 17.9 x 12 mm |
| Weight | 22.1 grams | 20 grams |
| Casing material | Polycarbonate | Polycarbonate |
| Strap/band material | TPU | TPU |
| Bezel Material | Polycarbonate | Polycarbonate |
| Strap size | 155 - 216mm | 155 - 216mm |
| Interchangeable band | 155 - 216mm | 155 - 216mm |
| Screen protection | 2.5D Tempered glass | 2.5D Tempered glass |
| Water resistant/Protection | Yes, 5ATM | Yes, 5ATM |
| Swim-proof | Recommended | Recommended |
| Color(s) | Black Blue Red Orange Gray | Black Red |
MEMORY | ||
| RAM | 512KB | -- |
| Internal storage | 16MB | -- |
| Memory card slot | No | No |
CONNECTIVITY | ||
| Bluetooth | Bluetooth v5.0 | Bluetooth v4.2 |
| Bluetooth calling | No | No |
| Wi-Fi | No | No |
| NFC | Yes (China) | No |
| Payment system | Ali Pay(China) | None |
| GPS | No (Connected GPS) | No |
CELLULAR TECHNOLOGY | ||
| Technology | None | None |
| SIM | None | None |
| Band | No | No |
NOTIFICATIONS | ||
| Email alert | Yes | Yes |
| SMS alert | Yes | Yes |
| Calls alert | Yes | Yes |
| Event reminder | Yes | Yes |
| Weather | Yes | Yes |
| Third-party apps | Yes | Yes |
| Text response | No | No |
FITNESS TRACKING | ||
| Sleep apnea | No | No |
| Sleep tracking | Yes | Yes |
| Steps | Yes | Yes |
| Floors climbed | No | No |
| Heart rate monitoring | Yes | Yes |
| Calories | Yes | Yes |
| Distance | Yes | Yes |
| Stress | No | No |
| VO2 Max. | No | No |
| Blood oxygen | No | No |
| Blood pressure | No | No |
| Menstrual cycle tracking | No | No |
| Swim tracking | Yes | Yes |
| Under-water heart rate tracking | No | No |
| Preloaded maps | No | No |
| On-screen workout modes | No | No |
| Triathlon mode | No | No |
| ECG Tracking | No | No |
| Preloaded sport modes | Yes, 6 | Yes |
| Safety tracking | No | No |
MEDIA | ||
| Audio | No | No |
| Music streaming | No | No |
| Bluetooth music | No | No |
| Radio | No | No |
| Loudspeaker | No | No |
| Microphone | No | No |
| Camera | No | No |
SENSORS | ||
PLATFORM | ||
| Operating system (OS) | Proprietary OS | Proprietary OS |
| Chipset | -- | -- |
| CPU | -- | -- |
| GPU | -- | -- |
BATTERY | ||
| Type of battery | Non-removable Li-Polymer battery | Non-removable Li-Polymer battery |
| Battery capacity | 135mAh | 110mAh |
| Battery life | Standby: 3 Weeks+ Mixed usage: 20 days | Standby: 3 Weeks+ Mixed usage: 18 days+ |
| Charging type | 2Pin pogo-pin | Charging cradle |
| Charging time | About 1-2 hours | About 1-2 hours |
| Battery saver mode | No | No |
| Solar power | No | No |
| Rapid charging | No | No |
CLOCK FEATURES | ||
| Time/Date | Yes | Yes |
| Stopwatch | Yes | Yes |
| Alarm | Yes | Yes |
OTHER FUNCTIONS | ||
| Control camera | No | No |
| Music control | Yes | No |
| Find phone | Yes | Yes |
MISC | ||
| Compatibility | Android 4.4+ iOS 9.0+ | Android 4.4+ iOS 9.0+ |
| Companion app | Mi Fit App | Mi Fit App |
| Voice command | Xiao AI (China) | No |
BOX CONTENTS | ||
| Mi Band 4 | Mi Band 3 | |
| Straps | Straps | |
| Charger | Charger | |
| Quick start guide | Quick start guide | |
| NOTE: We can't guarantee that all the information on this table are 100% correct. Read full disclaimer. Please, report an error. | ||
| Official Site | Official Site | |
Mi Band 4 vs 3 – The Differences
- Design
- Battery Life
- Activity Tracking
The new Mi Band 4 comes in a stunning stylish design that’s no doubt more stylish than the Band 3. Although, still same capsule shape, the Band 4 has some detailed curves that sets it apart from the Band 3.
With the Band 4 you can see more at a glance on its 0.95-inch display that’s slightly wider than the Band 3, and now features a more interactive AMOLED display in place of the monochromic OLED that powered the Band 3 display.
We don’t know the actual dimensions of the Band 4, but from the physical appearance, it appears to be a bit slimmer than the Band 3.
Beyond the difference in display size and type, the casing and straps materials remain the same.
The Band 3 was remarkable for its impressive battery life that could last about 2 weeks or more. Well, the Band 4 has got a boost in the battery capacity that sees it house 135mAh lithium polymer battery instead of the 110mAh of the Band 3 which the company says will increase the battery life of the Band 4 by 20%.
That’s about 3 days extended battery life that leaves the Band 4 with a more impressive battery life.
While the Mi Band 3 was a quite outstanding fitness tracker featuring a 3-axis accelerometer and a heart rate sensor, the Band 4 features a 6-axis that includes, 3-axis accelerometer and 3-axis gyroscope, and as well the PPG heart rate sensor that makes it a more comprehensive activity tracker.
With the 3-axis gyroscope onboard, the Mi band 4 can now track your cycling and elliptical activities which the Band 3 lacks the ability to.
Which is Better?
Although, we’d thought that with the new features and design, the price of the Mi Band 4 would skyrocket to the top, but fortunately it’s not the case.
Actually the Band 4 is nearly same price as the Band 3, while the band 3 is about $30, the Band 4 is priced about $35 for the standard edition with the NFC edition priced $45.
Beyond the price, the Mi band 4 is clearly a better choice, it has a longer battery life, a more comprehensive activity tracker, and as well as a more decent appearance than the Band 3.
Here is a summary;
| MI BAND 4 | A stylish and more comprehensive activity tracker with a longer battery life. |
| MI BAND 3 | Also a great choice, a smart alternative. |
Our Pick
The Mi Band 4 has a better design while also being a more comprehensive fitness tracker with a slight longer battery life. It’s no doubt a better choice, and our preferred choice.
Hi! I’m Jude, the chief editor at Smartwatchseries.com
I’m a graduate of biochemistry, a 3D artist and a passionate fitness enthusiast. On here, I and other smartwatch fans work hard to help you find the right smartwatch for you with our guides, reviews, and comparisons.
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