Vivo IQOO Watch GT 45.8mm vs Watch GT 2 Bluetooth
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 50mm, the IQOO Watch GT 45.8mm is the safer pick — it stays proportionate down to roughly 48mm, where the Watch GT 2 Bluetooth starts to hang over the edge. Above 50mm both sit cleanly, and the Watch GT 2 Bluetooth gives you more presence.
The Watch GT 2 Bluetooth wears larger than the IQOO Watch GT 45.8mm (40.2mm vs 39.6mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
On the wrist the IQOO Watch GT 45.8mm feels lighter (33g vs 35.8g, case only).
The IQOO Watch GT 45.8mm is middle-of-the-pack for thickness among the 561 40mm watches in the database.
Among the 530 40mm watches we hold thickness for, the Watch GT 2 Bluetooth is thicker than 65% — it will sit high even though the case width reads modest.
The Watch GT 2 Bluetooth is 0.6mm wider, 1.7mm longer, 0.2mm thinner and 2.8g heavier than the IQOO Watch GT 45.8mm. Both are rectangle.
iQOO Watch GT - 45.8mm
Watch GT 2 - Bluetooth
Switch or add watches
Vivo
iQOO Watch GT - 45.8mm
Vivo
Watch GT 2 - Bluetooth
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Measure at the point where you wear your watch — typically just below the wrist bone.
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Vivo iQOO Watch GT - 45.8mm
Case 45.8mm · Lug-to-lug 45.8mm · Thickness 11.2mm · 33g
Balanced Fit
45.8mm on a 55mm wrist
Comfortably inside the edges of your wrist, and it seats and sits low enough to wear without thinking about it.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 45.8mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist4.6mm spare each side
Comfortable, with visible skin either side.
- Off the wrist11.2mm off the skin
Normal sports-watch height for a wrist this size. (11.2mm case, back against the skin)
- How it seats~5.5mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist33g
Light enough to forget you have it on. (0.6g per mm of wrist)
Vivo Watch GT 2 - Bluetooth
Case 47.5mm · Lug-to-lug 47.5mm · Thickness 11.0mm · 36g
Sweet Spot
47.5mm on a 55mm wrist
Across the wrist it works — 3.8mm spare each side — but wide enough that the edge of the case back lifts clear of the skin.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 47.5mm.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist3.8mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist11.0mm off the skin
Normal sports-watch height for a wrist this size. (11.0mm case, back against the skin)
- How it seats~6.4mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist36g
Light enough to forget you have it on. (0.7g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Vivo iQOO Watch GT - 45.8mm39.6mm × 45.8mm · 11.2mm thick
- Vivo Watch GT 2 - Bluetooth40.2mm × 47.5mm · 11mm thick
3D preview
iQOO Watch GT - 45.8mm vs Watch GT 2 - Bluetooth on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Furthest apart in Smartwatch mode, where the IQOO Watch GT 45.8mm lasts 1.2× as long as the Watch GT 2 Bluetooth (21 days against 17 days).
IQOO Watch GT 45.8mmWatch GT 2 Bluetooth
Smartwatch
21 days17 days
Specifications
The short version
11 key specs| Spec | VivoiQOO Watch GT - 45.8mm | VivoWatch GT 2 - Bluetooth |
|---|---|---|
| Case Width | 39.6mm | 40.2mm |
| Lug-to-Lug | 45.8mm | 47.5mm |
| Thickness | 11.2mm | 11mm |
| Weight | 33g | 35.8g |
| Shape | Rectangle | Rectangle |
| Water Resistance | Water resistant | Waterproof |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.85 inches | 2.07 inches |
| Battery life | 21 days | 17 days |
| Released | 2024 | 2025 |
Every specification
106 specs| Spec | Vivo iQOO Watch GT - 45.8mm | Vivo Watch GT 2 - Bluetooth |
|---|---|---|
| Design | ||
| width | 39.6 | 40.2 |
| height | 45.8 | 47.5 |
| volume | 20.31 cm³ | 21 cm³ |
| weight | 33 g | 35.8 g |
| thickness | 11.2 | 11 |
| resolution | 1.85 x 450 px | 432 x 514 px |
| screen size | 1.85 inches | 2.07 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 322 ppi | 324 ppi |
| width of band | 22 mm | 22 mm |
| water resistance | Water resistant | Waterproof |
| Always-On Display | Yes | No |
| has a touch screen | Yes | Yes |
| is designed for kids | No | No |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| has branded damage-resistant glass | No | No |
| Battery | ||
| battery life | 21 days | 17 days |
| battery power | 505 mAh | 595 mAh |
| has wireless charging | No | No |
| has a removable battery | No | No |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | No |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | No | No |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | No | No |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| release date | 2024-07-12 | 2025-10-13 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | No | No |
| Locates your phone | Yes | Yes |
| has a front camera | No | No |
| has fall detection | No | No |
| has voice commands | No | Yes |
| Acquires GPS faster | No | Yes |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | 1 |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | No | No |
| Has a built-in camera remote control function | Yes | Yes |
| warranty period | — | 1 years |
| has HRV tracking | — | Yes |
| measures VO2 max | — | Yes |
| shows readiness level | — | Yes |
| has fast/slow heart rate notifications | — | Yes |
| Connectivity | ||
| has NFC | Yes | Yes |
| SIM cards | 1 eSIM | — |
| supports ANT+ | No | No |
| supports Wi-Fi | No | No |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| has a cellular module | Yes | No |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has passcode | No | No |
| Has auto pause | No | No |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an external memory slot | No | No |
| has a battery level indicator | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| Compatible with external heart rate monitors | No | No |
| battery size | — | 595 Wh |
| App & Software | ||
| Ad-free | No | No |
| Free app | Yes | Yes |
| Has coaching | Yes | No |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | Yes |
| Can be personalised | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | Yes |
| Tracks water intake | Yes | Yes |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | Yes |
| Has temperature tracking | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | No |
| Designed for golf | No | No |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| Has a route tracker | Yes | Yes |
| Has exercise tagging | Yes | Yes |
| Has multi-sport mode | No | No |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | — | No |
Wrist Fit
Vivo IQOO Watch GT 45.8mm
Sits best on wrists ~48–65mm wide (≈ 12.8–17.4cm circumference).
Vivo Watch GT 2 Bluetooth
Sits best on wrists ~50–68mm wide (≈ 13.4–18.2cm circumference).
Frequently Asked Questions
Is the Vivo IQOO Watch GT 45.8mm bigger than the Vivo Watch GT 2 Bluetooth?
The Vivo Watch GT 2 Bluetooth is bigger — 40.2mm vs 39.6mm case width.
Which fits a smaller wrist better, the Vivo IQOO Watch GT 45.8mm or the Vivo Watch GT 2 Bluetooth?
The Vivo IQOO Watch GT 45.8mm suits wrists around 48–65mm wide, and the Vivo Watch GT 2 Bluetooth around 50–68mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Vivo IQOO Watch GT 45.8mm and Vivo Watch GT 2 Bluetooth side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.