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FLIR FLIR ONE Gen 3, phone thermal camera review

A phone-attached thermal camera whose listing states both numbers plainly: an 80 × 60 thermal detector behind a 1440 × 1080 displayed image, with accuracy given as ± 3 °C (37 °F) or ± 5%.

What the figures leave us with The honest entry point. It tells you its detector is 80 × 60, which is exactly what most listings in this category hide.

One of the cheapest thermal cameras here, and the one whose listing is easiest to read correctly.

What the manufacturer publishes

Compatibility with all USB-C Android devices, connecting directly to the phone’s charging port. High-resolution IR images at 1440 × 1080 image resolution with 80 × 60 thermal resolution. Step-by-step thermal inspection guidance in the FLIR ONE app. Temperature measurement within ± 3 °C or ± 5%, when the device is between 15 °C (59 °F) and 35 °C (95 °F) and the scene is within a stated range.

The two resolutions, in one sentence

FLIR gives both numbers next to each other. The thermal detector measures at 80 × 60 — 4,800 points. Everything else in the 1440 × 1080 image is the visual camera and interpolation, which makes the picture legible and adds no measurement. Read the second number as image quality and the first as instrument capability.

Every listing in this category quotes an image resolution. Most in this hub quote a detector resolution as well. This is one of them.

What 4,800 measured points is enough for

Finding a cold bridge, a missing insulation batt, an overheating connection, a blocked radiator. All of those are large, high-contrast features. What it will not do is resolve a small component in a crowded panel, which is what the 256 × 192 camera below it is for.

Availability

Read on the day this page was built: $250 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 31 August 2026. The live price is at the top of the page.

What it has, and what it lacks

Strengths

  • States the detector resolution — 80 × 60 — alongside the image resolution, which is honest and rare
  • Publishes an accuracy figure with its conditions: ± 3 °C (37 °F) or ± 5% between 15 and 35 °C (95 °F) ambient
  • Plugs directly into a USB-C Android phone, so the screen and storage are already in your hand
  • The FLIR ONE app provides step-by-step inspection guidance
  • On sale across all six markets

Compromises

  • An 80 × 60 detector is the lowest here — 4,800 real measured points
  • The 1440 × 1080 headline figure is an upscaled image, not measurement
  • Depends entirely on a compatible phone

Specifications

Amazon referenceB0728C7KNC (identical on 6 markets)
EAN0812462024032
Camera resolution80 × 60 detector · 1440 × 1080 image
Stated accuracy± 3 °C (37 °F) or ± 5% stated
Connectivity and storageUSB-C Android

Where this one lands in its group

At $214, it is the 3 cheapest of the 7 models in this category published here.

  • Cheapest in the group$139
  • Median$300
  • Dearest in the group$479

What gets asked here

Which resolution should I believe?

The 80 × 60. That is the detector — the number of points where temperature is actually measured. The 1440 × 1080 is the displayed image, produced by combining the thermal data with the visual camera and scaling it. FLIR states both in the same listing, which is more than most makers do.

What does ± 3 °C (37 °F) or ± 5% mean?

Whichever is larger. FLIR also states the conditions: the device between 15 °C (59 °F) and 35 °C (95 °F) and the scene within a stated range. An accuracy figure without conditions is incomplete, and this one has them.

Does it work with an iPhone?

This reference is the USB-C Android version. FLIR states compatibility with all USB-C Android devices.

Our score

7.2/ 10

The honest entry point. It tells you its detector is 80 × 60, which is exactly what most listings in this category hide.

Against the measuring instruments in the same bracket

Same category, nearby prices, between measuring instruments. What remains is the specifications every one publishes — half empty, a column is no use.

Model Price Camera resolutionStated accuracyConnectivity and storage
FLIR ONE Gen 3, phone thermal camera $214 80 × 60 detector · 1440 × 1080 image± 3 °C (37 °F) or ± 5% statedUSB-C Android
Raythink Dual-lens imager, 320 × 240 upscaled $200 "BOOSTS thermal resolution to 320x240 in real time", stated — and NO NATIVE DETECTOR FIGURE APPEARS ANYWHERE on the listing. That makes it the only camera on this shelf that publishes the upscaled number alone. This shelf's introduction is explicit: the detector resolution is the only figure that describes what a camera can actually resolve, and it is routinely buried under a larger image resolution produced by upscaling. Here it is not buried; it is absent. The word "boosts" tells you there is a smaller number and not what it is±2 °C (36 °F) or ±2%, stated. Along with the RISION's ±3.6 °F and the HSFTOOLS pair's max(±3.6 °F, ±2%), that is the figure five cameras on this shelf publish and both Kleins do not8 GB internal storage, wireless transfer to a mobile app, and WINDOWS PC SOFTWARE for real-time display, temperature analysis and data export. Automatic maximum, minimum and center points plus SIX customisable spots, and high and low alarms
RISION Phone thermal camera, 320 × 240 from 160 × 120 $139 160 × 120 DETECTOR, stated plainly — "upscales the image to 320×240 QuadIR resolution from NATIVE 160×120". That is 19,200 real measured points, which is exactly what both Klein cameras on this shelf publish as "19,200 pixels" at $299.99 and $314.38. This shelf's introduction says the detector is the only figure that describes what a camera can resolve, and this is the cheapest 160 × 120 here by a factor of two±3.6 °F, which is ±2 °C (36 °F). The listing calls it "professional-grade", which it is not in the sense of a named standard, and the figure matches what the Raythink and both HSFTOOLS cameras state as ±2 °C (36 °F) or ±2%None of its own: images and video live on the phone, through the RISION View app, which the listing states requires NO REGISTRATION. The app offers temperature threshold, picture-in-picture, spot, line and area analysis with real-time graphs and isotherm capture, and 12 color palettes — more palettes than anything else on this shelf
Klein Tools Phone thermal imager, 19,200 pixels $300 "19,200-PIXEL RESOLUTION", stated — as a COUNT and never as a grid. Nineteen thousand two hundred is 160 × 120, which is what the RISION on this shelf states explicitly for $139. This shelf's introduction lists resolutions as grids — 160 × 120, 256 × 192, 320 × 240 — because a grid tells you the shape of the image and a pixel count does not. This and its TI250 sibling are the only cameras on this shelf whose resolution is published in this formNOT PUBLISHED. No tolerance figure of any kind appears on the listing, where five cameras on this shelf state ±2 °C (36 °F) or ±2%Images and video are stored on the phone, including a TIME-LAPSE video feature, which nothing else on this shelf publishes. Three color palettes — ironbow, rainbow and greyscale — against 12 on the RISION, 9 on the Raythink and 7 or 8 on the HSFTOOLS pair

What the models do not share, in measuring instruments

  • If price decides: RISION Phone thermal camera, 320 × 240 from 160 × 120, at $139.

This one’s price among measuring instruments

A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.

Details checked on August 31, 2026.

Who should pick this one, among measuring instruments

A first thermal camera for home inspection, where finding the cold spot matters more than resolving it finely.

Our measuring instruments guides that pick it

What buyers actually choose

Amazon reports what buyers took in the month before this page was last checked: at least 50.

The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.

Sources

Specifications: the manufacturer sheet for measuring instruments and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

The method applied to these measuring instruments