I have just become aware of (and ordered) the NX31. In the image here I have de-faked the dials back with a 86% factor!
I had edited this posts a few times but it is not worthy a full review, not recommended!
From the listing it is supposed to me 8mm thick, ø41.1mm and 47.6mm long, with a ø1.32″=33.5mm
In reality it is 10.5mm thick, and 8.5mm towards the edge. The screen is curved, and protrusion cover a very large part of the back.
As usual hard to find the manufacturer, but I bought it from some seller on Aliexpress here.
It is also sold as “NX21” – and likely many other names, can be recognised by the print on the back “220-JP7653” though that number is ALSO used for a smartring(HC-02-9), so something fishy here…
…I guess neither really got a certification
Here some key specs from the listing (click to enlarge)
(If the rendering is correct, the full thickness including the large ø23 area flat protrusion is 9.2mm is 10.5mm, and the band very narrow at 16mm)
And they certainly should be praised for being honest about the length – That is rare!!! – though strictly speaking it is 47.75mm, but that 0.3% might be specimen variation.
Though it is quite long for a watch that by the ø41.1mm indicates that it is aimed at minor wrists.
It is 1.25mm longer than the 0.1mm less wide H06.
Searching a bit on Alibaba led med to this link from a possible distributor “Sibotesi” Note that the link says “Sportscam” and the logo “IXIU”….??
In the listing they mention that the app is “FitCloudPro”, and in my experience is that not a good sign, so I fear it is a crappy watch…
That sellers page again led me to the existence of the G34, that I will try to dig into….
Here some spec compares
| G34 | NX31 | H06 | DA09 | GX03 | T8classic | T82024/T8Pro | T8mini | DW01 | MT55/MT56 | TN88 | |
| Screen coverage | 67% | 67% | 67% | 71% | 75% | 59% | 61% | 57% | 65% | 62% | 61% |
| Bezels | 3.9mm | 3.8mm | 3.7mm | 3.4mm | 3.5mm | 5.0mm | 4.7mm | 4.9mm | 4.0mm | 4.9mm | 5.1mm |
| Bezel under glass | 3.0mm | ??mm | 2.5mm | 2.8mm | 2.5mm | 3.4mm | 3.3mm | 3.4mm | 2.9mm | 3.0mm | 3.0mm |
| Display diameter | 1.32″ | 1.32″ | 1.32″ | 1.43″ | 1.75″ | 1.3mm | 1.32″ | 1.19″ | 1.32″ | 1.43″ | 1.43″ |
| Case diameter | 41.4mm | 41.1mm | 41.0mm | 43.1mm | 51.4mm | 43.0mm | 43.0mm | 40.0mm | 41.6mm | 46.2mm | 46.5mm |
| Case length | 45.9mm | 47.6mm | 46.5mm | 48.8mm | 54.4mm | 48.2mm | 48.2mm | 46.0mm | 47.7mm | 52.2mm | 53.0mm |
| Thickness full | 8.9mm | 10.5.mm | 9.1mm | 7.75mm | 9.1mm | 7.8mm | 7.8mm | 8.05mm | 7.5mm | 8.3mm | 8.5mm |
| Less protrusion | 7.7mm | 8.5mm | 7.3mm | 7.75mm | 7.3mm | 6.9mm | 6.9mm | 6.95mm | 6.8mm | 8.3mm | 7.5mm |
The G34 uses a different app and chipset, so most likely it is just a distributor I have found, that distributes both the G34 and the NX31 watches.
Conclusion
Generally the NX31 just feels like crap, and also gladly claims reading HR, BP and SpO2 of a wooden table!!!
It only got 8(!) workout modes, that is the least I think I’ve ever seen.
But to say just something positive, apart from the cable it came with both a screen protector and a manual. I did not try to apply the protector, but unless it is rather elastic it will not work on a curved screen…
Packed down, and most likely will never again see the light of day… Wasted money…