Thank you for choosing Therm-App™

It is important to us that your experience with Therm-App® will be perfect. Below you can find a link to our support page which features useful information that would help you make the most out of your Therm-App® device.

Below you will also find a few general questions and video tutorials which may assist.

In case you still feel like your needs have not met by the information below, please do not hesitate to contact us at:

Frequently Asked Questions

Which phones are compatible with Therm-App?

Therm-App should be compatible with any phone that  runs Android 7.0 “Nougat” or above and supports USB “host” mode (USB-OTG).

What are the full technical specifications of the Therm-App device?

General Information


384 x 288 pixels (>110k pixels)


LWIR 7.5-14um

Lens Options and FOV

6.8mm Lens (55 x 41⁰ )

19mm Lens (19 x 14⁰)

Frame Rate



 138 grams / 4.87 ounces  (with 19 mm lens)


55 x 65 x40 mm (2.16 x 2.55 x 1.57 in)

Operating Temperature

-10°C to +50°C  (-4°F to +122°F)

Power Supply

5V over USB cable

Power Consumption

 Less than 0.5W.



Device Attachment

Clip-on for smartphone (5.8-10cm span)

Mobile Platform Support

USB OTG (On The Go) compatible devices

Mobile OS Compatibility

Android 4.1 and up

Recording and Sharing

Therm-App™ Smartphone App

Imaging Modes


Color temperature mapping: 5°C – 90°C

Available colors: Rainbow, Iron, Grayscale

Enhanced Vision

High-resolution thermal imagery (grayscale night vision)

NETD <0.07 degrees C

What is USB-OTG?

OTG is an abbreviation for “On-The-Go”. It is a specification that allows devices such as smartphones to act as a host, allowing other USB peripheral devices like a USB disk-on-key, mouse, keyboard  or camera to be attached to them (this is why OTG capability is sometimes referred to as “host mode”).

Unlike conventional USB connectivity, in USB-OTG connections the host (in our case the Smartphone) will provide 5V power feed to the peripheral device (in our case the Therm-App device). It will also control and read the raw data from it.

The USB-OTG standard makes use of a special wiring trick inside the USB connector in order to signal the Smartphone that it should become a host. This is why Therm-App only works with  USB-OTG cables. For more info see: or

How do I install Therm-App™ on my phone?

  1. Before plugging in the Therm-App device, visit Google Play and download the free Therm-App Basic app.  
  2. After installing the app, attach the Therm-App device to the back of your mobile device by turning the sizing screw, and ensure that it is firmly attached. If this is your first installation of Therm-App, make sure you have a solid internet connection active on your phone.
  3. Connect the USB-OTG cable to both Therm-App and your mobile device.
  4. Your Android operating system will ask for your permission to associate the USB device with the Therm-App application. Approve and continue.
  5. The Therm-App application will automatically start. 
  6. Review and accept the Terms and Conditions.
  7. At first use, the application will automatically download a calibration package to your phone. This is a one-time procedure.

What if my Therm-App™ device isn’t working?

If this is your first time operating the device, you might want to check our installation guidelines.

If you have already used the Therm-App device, please try the following:

  • Disconnect both sides of the cable, then reconnect it .
  • Restart your phone, then try launching Therm-App again.
  • Uninstall Therm-App, then reinstall Therm-App application.

Does Therm-App™ work on iOS, Windows Phone or Blackberry?

Currently we support Android OS 7.0 and above.

What is the viewing range for Therm-App™?

Based on the Johnson’s criteria, equipped with the default 19mm lens, your Therm-App™ device can spot a moving human target  at up to 500 m (1640 ft.) and a moving vehicle target at up to 1500 m (4921 ft.).

Can I use any USB cable with my Therm-App™ device?

Actually no. Therm-App™ will only work with a USB-OTG (On The Go) cable that allows for both communication and power transfer.

Please note that low quality USB cables may affect the image quality received from your Therm-App™ device.

How do I know which Android version my phone is running?

On most Android phones, you will need to go to your “Setting->About my Phone” to find this information. If you cannot find it,  please contact your mobile phone provider for details.

Valuable Links

Software Upgrades

Therm-App™ on Google Play

Technical Documentation

Product Brochure

User Manual

Video Tutorials