Ultra thin TN88 smartwatch, (review coming later)

In December 2023 (I think) a new ultra thin watch was launched, even thinner, 7% wider and with 21% larger display than the T8.

This post is a work in progress, that I expect will become a proper review when the ordered arrives… Primo March I hope.

I don’t think it is a direct successor of the T8, I believe it is another company “Funost Tech” (YouTube channel here), and the TN88 looks more like a classic watch, especially the band arms, for the standard pin 20mm bands.

I have been quite pleased with the T8 and bought many, so you might start with browsing the tl;dr part of that review.

But let us start with a little spec compare

Property T8 TN88
Dimensions 43.0×43.0×6.9mm 42.6×42.6×6.5mm ø46.0×6.5mm
The 42.6 is the glass only!! [*]
Watch case weight
(less band)
24g ??
End to end length 48.2mm ~53mm
Display 1.3″(33mm) 360×360 1.43″(36mm) 466×466
Display coverage 59% 61%
Bezel ring
(under the glass)
3.5mm 3mm
Protrusion width
~20mm ~24mm
Case material Zinc alloy 316 steel
Chips RTL8762
OS min And/Ios 4.4/9.0 5.0/13.0
App QWatch Pro Da-Fit
Feature diffs Rotary crown,
Dial Call,
Voice Call,
AI voice assistant
Password lock

Stainless steel 316 contains about 10% nickel, so should be hypoallergenic.  If I get a rash it will kill any enthusiasm over the TN88 quickly…

I found a spec-table here:

Property Value
Model Number: TN88
Place of Origin: Guangdong, China
Moq: 1 Piece
Certification: RoHS, CE, FCC, etc
Warranty: 1 Year
Master Chip: TN88
G-Sensor: JL7013A/VP556ER
Heart Rate Sensor: LC09A
CPU Clock Frequency: Dual-Core 2*192MHZ
System Memory: 256MB
Screen Resolution: 466*466
Screen Display : 1.43 Inch AMOLED Ultra Clear Screen
Battery Capacity : 3.7V/180mAH
Standby Time: 15 Days
Bluetooth Version : BT3.0+BT5.2
GPS Positioning: Support
Strap Of Type: Milan Steel Strap + Silicone Strap, Leather Strap
Frame Size: 3MM
Body Size: 42.6×42.6×6.5mm ø46.0×6.5mm
The 42.6 is the glass only!! [*]
Wirstband Size: 160-250MM
Steel Strap+Silicone Strap Color: Golden Blue, Gold Light Green, Roulan Orange, Silver Steel, Green Purple
Genuine Leather Strap Color: Dark Green, Light Brown
Compability System: OS13.0+, Android 5.0+
Waterproof Level: IP67
Bracelet Material: 316 STEL+Steel Strap Leather Strap
Heart Rate Monitoring: Support
Sleep Monitoring: Support
Blood Oxygen Monitoring: Support
Female Health: Support

That has features in images, and not as text, i found list here
Calendar, Alarm Clock, Remote Control, Sleep Tracker, Fitness Tracker, Passometer, Call Reminder, Answer Call, Push Message, Message Reminder, Dial Call, Heart Rate Tracker, Activity Tracker, Heart Rate Monitor, Breath Monitor, Music player, Sedentary Reminder, AI voice assistant

So they seem to have even found room to squeeze in a speaker and a microphone somewhere!


For now I ordered the ‘gold’ one, and expect to swap the band with a black Milanese loop band.

I ordered it here, for €28 including shipping (€35 also including local Danish taxes), and I expect it in a month or so, so now I’m waiting….


At first this variant looked very appealing to me, with integrating band ends, butterfly clasp and everything

(I only found it for sale here at a shop with about double prices on all!)
But on second thought I think it might look fairly ugly when the display is off, as faked here:

Had it been black with the same golden ornaments, I think it might have looked really nice. Tried to fake that somewhat with simple inversion tools (all plus hue). Though it ended more gun metal than black….


I found this video, in the Funost channel and I noticed that the TN88, unfortunately have the glass sticking out slightly, increasing the risk of scratches if you have it upside down, e.g. for charging, so the display will get any ‘beating’ from sharp dust on a table. e.g. ash. Sort of defeating the purpose of using a steel case… But of course this is normal for proper watches too, so helps in making it look more like a real watch, so pros and cons….

In contrast the T8 got the metal sides a hair over the glass, reducing the risk of scratches.

Protrusions and holes

The sensor protrusion is an about 24mm wide round island with slanted edges (from images about 20s into the above video, including the below).
An oddity I have not seen before is that the charging contacts got a small protrusion island too, of about 19×6mm, and about half the height. I bet this was added with the sole purpose of claiming the thing as a bit thinner. Seems a bit silly, but maybe it was to just to get the bragging rights over the T8?. I wonder if it makes the watch tilt slightly on the arm, or it just sinks in?? I’m a little worried that the about 50% larger protrusion may prevent it from ‘sinking into’ the arm, and thus have the watch hoovering. On the other hand the protrusion seems less deep than on the T8

Note also what looks like two small round holes and a slit on the back. Could that be the speaker and two mics?? Or one mic and a reset? Would be a bit weird if you had to take it off for mic/speaker, on the other hand they sit fairly protected during normal wear, and I see no other ‘holes’ in the renderings/images at all. (Do not get fooled by the the image above on the side opposite the crown. These are just reflections, not speaker holes)

This video looks like pure rendering (with exaggerated display size), but have nice clear details. (e.g. the holes)


Sensor arrangement

It seems that there are two LED blocks (assumably multi-coloured) in the middle and then sensors in the area around. So looks more advanced than the one sensor and two double-colour LED’s next to it on the T8.
Hope to be able to see some details here when I get it.


[*] Actual size

Here a screendump with some numbers (as usual click to enlarge), so MUST be 1.43″*408/322=ø46.0mm, and it is the glass disc only that is 1.43″*378/322=ø42.6mm!