As I can't write a review just for the Band 7, my experience with the Band 5 follows this Band 5 vs Band 7 detail. I own both. I upgraded to four stars from one because the 5 turned out to be a bit better that expected and the 7 is just great. But for the poor documentation, one star is whacked.
The physical differences for the two bands is self-evident.
For the fitness/health feature sets and user interface, the Amazfit web site has plenty of info. The FAQs and Support pages are good but you need to really scrape around for the data. There are gobs of online videos for these two bands.
Presented here are the core components and workings of the two bands' stuff. Mobile device integration, Alexa and workout apps are not discussed.
• BPM & SpO2
Band 5: An array of 2 LEDs and 1 PD (photo detector).
Band 7: The same, redesigned.
• Motion/movement
Band 5: 3-axis gyroscopic sensor
Band 7: Geomagnetic sensor
Band 5 & 7: 3-axis acceleration sensor
• Data engine algorithms
Band 5: BioTracker 2
Band 7: BioTracker 3
• Operating system
Band 5 & 7: Zepp OS
•• Band 5 monitoring ••
Same as Band 7 but no BPM Activity Detection Feature.
•• Band 7 monitoring •• (Manual reading is also referred to as on-the-spot)
-BPM, Stress, SpO2: 24 hour
-BPM will update at user selected frequencies, when awake; 1, 5, 10 or 30 minutes. If set at the higher frequencies, the Activity Detection Feature sets it at 1 minute for the duration of the activity. Instant manual updates can be taken at any time. Real time BPM display is not available.
-Stress and SpO2 updates are locked at 5 minutes.
-During sleep, BPM updates every minute, Stress and SpO4 update every 5 minutes.
-While awake, manual updates can be taken; SpO2 requires up to 30 seconds, Stress needs all of 45 seconds, while keeping the arm motionless.
-While awake, auto-updates will be taken if the arm is motionless for five or more minutes and remains so for the 20 and 45 seconds needed. This is otherwise know as "at rest" readings.
• Other
-Band 5 watch faces are far more available given its greater market place exposure. Band 7 may catch up in time.
-Available Band 7 watch faces seriously lack component customization.
-Band 7 replacement and designer bands have to catch up to the overwhelming choices available for the Band 5.
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One star for the hardware's competent core functionality. Zapped four stars for tedious hardware & app user interface, worthless user online & PDF documentation. Added one star for the app's data screens. Zapped it for false triple-digit BPM alerts.
The first watch was DOA; did not respond to swipes or charging. The PDF says " Plug...the charging base into...your charger...a charging icon appears." 1) It's a cable, not a base. 2) The icon did NOT appear.
Amazon exchanged it for another and it too did not respond to swipes or charging. I put down the watch to go gather up the items and packaging to prepare for the refund process, a few minutes, and I noticed the icon on the watch.
Even though my other Bluetooth devices were OK, I was met with "Couldn't scan." I did ALL the usual uninstall/re-install, restart the app, restart the phone, clear this cache that cache. No fix.
Determined, I found a video where a Band 5 factory reset (and reboot) was detailed, several levels down in the undocumented Settings. I did the reset. Boom! Bluetooth OK. BTW, this is where Brightness levels are set - a real pain when wanting to move in and out of doors where a comfortable indoor brightness is worthless outdoors and the brightest setting for outdoors is way too much indoors. It should be noted neither the reset or reboot are documented anywhere within Amazfit help and support.
During my search I ran into more than one un-boxing video describing the DOA issue I had where one user reported waiting 15 minutes before the icon appeared. Another, three hours!
The Zepp Android app is unintuitive where profile settings have been cobbled together from the earlier versions to the latest. You'll have many "What happens when I do this?" Development teams for the watch and app have never met up other than for birthday cake in the break room. But once set up, the app is effective at wrapping up data to present in nicely laid out graphics especially in the dark mode.
The reflectance driven BPM and Sp02 spot-check values match that of my transmittance EMAY EMO-80 pulse-oximeter. Given the near-instant transmittance sensors, today's reflectance sensors, other than being quite slow, have come a long way for spot-checks. Full-time recording, not so much.
While full-time SpO2 data is not available, it is checked during sleep and used for calculating the Sleep Score and Sleep Stages among other sleep-time reports.
The only app I use is Walk for my daily one mile walks. I previously used an old-school Medline MDSP3044 pedometer watch and I wore it along with the Band 5 on three walks. The step counts, BPM and calories burned values for the two were well in the margin-of-error range, e.g. 0.98 vs 1.01 miles.
I was disturbed by the triple digit BPM alerts while I sitting idle at my desk or in my recliner. Recording real-time BPM with the EMAY Oximeter app revealed the Band 5 alerts to be false.
The Band 5, the Zepp app and it's BioTracker 2.0 does a very good job recording and presenting useful data gathered up by it's optical, acceleration and gyroscope sensors. Considering it's price point, the Band 5 is an excellent value. An economical step up is the Band 7 with updated optical sensors, geomagnetic sensor (vs gyroscopic) and BioTracker 3.0 if a much larger screen isn't a fashion or physical disadvantage. The 5 is sleek, the 7 is not.
I don't use mobile device integration, Alexa or web dependent apps, like Weather.
REVIEW BONUS: While I just said I don't use web dependent apps, I did play with Zepp's Walk. I've included a screen shot of my daily one-mile walk which I do by zig-zagging around in my 5500 sq ft back yard.
| 商品尺寸 | 4.67 x 2.41 x 1.22 cm; 27.22 克 |
|---|---|
| 产品颜色 | 米色 |
| 网络制式 | Bluetooth 5.2 |
| 操作系统 | Zepp OS |
| 屏幕尺寸 | 1.47 英寸 |
| 型号 / 款式 | B2177OV2N |
| 包装清单 | 磁性充电线, Band 7 健身追踪器, 用户手册 |
