← All tools
GOYOJO GW340 · USB-C plug on top
Thermal camera · pro
Spark Pro
Made by GOYOJO · model GW340
A$349
More than 5× the thermal pixels of Spark (256×192 vs 96×96). Small cracks, single pipes and loose wires stay sharp — the one to choose for a whole house.
Works with
✓ iPhone 15 Pro – 17 (USB-C)? iPhone 18 · iPhone 15 — not on the maker’s list yet✓ Android 12+ (USB-C)iPhone 14 or older: USB-C only — see Reach Duo
How it works
- Plug it into the phone’s USB-C port.
- Open the free “THG Start” app.
- Scan slowly — the hottest and coldest spots are marked for you.
Specs (from the manufacturer)
| Thermal sensor | 256×192 (512×384 enhanced) |
| Refresh rate | 25 Hz |
| Field of view | 50° × 37.5° |
| Thermal sensitivity | 50 mK |
| Temperature range | −20 to 350 °C |
| Weight | about 21 g |
| App | THG Start (iOS, Android) |
In the box
- Thermal camera (USB-C)
The maker no longer includes a Lightning adapter, so it fits USB-C phones only. Range shown as −20 to 350 °C (the lower of the maker’s two figures).