The Thermodo was successfully funded on Kickstarter last Spring to the tune of $336,018. The designers were only seeking $35,000 to build the tiny electrical thermometer, but apparently people really want to know what the temperature is in the general vicinity of their headphone jack. The device has reached most backers and now the promised Android app has hit the Play Store.

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Thermodo is a high-precision temperature probe connected to an audio jack. When plugged into a phone it can transmit data to the companion app for monitoring the temperature in the local environment. When not in use, Thermodo stows in a keychain holder.

The early reviews are noting some irregularities in readings, but the makers are apparently still working on Android device support. Transfer of heat from the phone and the user's pocket might also be throwing some readings off. Only a few phones have been certified working, but you should be able to install the app on anything to test it out.

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The companion app for Android was unlocked as a stretch goal in the Kickstarter campaign, and it doesn't have much of an Android vibe. It actually looks very similar to the iOS app. That said, it's responsive and pretty easy to figure out. Third-party developers can also build support for Thermodo into their apps, but this is the only one right now.

[Thanks, Kenny O]

Ryan Whitwam
Ryan is a tech/science writer, skeptic, lover of all things electronic, and Android fan. In his spare time he reads golden-age sci-fi and sleeps, but rarely at the same time. His wife tolerates him as few would.

He's the author of a sci-fi novel called The Crooked City, which is available on Amazon and Google Play.

  • vgergo

    S4 / Note 3 has it built in

    • Ivan Myring

      Do they?

    • Jobe


      • vgergo

        The note 3 has a hole in the right side, many people think it's a third mic, but actually it is for the thermometer and humidity sensors. You don't even need s health, there are other apps available on the play store + you can use temperature triggers in tasker. I use voice command to activate it, so i don't interfere with the readings by touching the phone. This way I found the Thermometer to be very well calibrated, I have no way to check the humidity meter

    • André Roggeri Campos

      Thru S Health app is possible to measure temperature on the comfort level menu

    • Scott Warner

      Its ridiculously inaccurate. As in if you touch your phone within 5 minutes of trying to get a reading, its off by 10f+. I was working on an app to record ambient temp/humidity/pressure, but only the pressure sensor is unaffected by phone usage or hands
      Its meant more for battery temperature

    • http://www.flickr.com/photos/77537273@N03/ Herman

      We both know there will be plenty of S4 / Note3 users who cannot wait to get their hands on these little devices :)

  • mauswe

    Wow i remember my old nokia having this. Didnt use it much though.

  • http://gplus.to/mbirth Markus Birth

    With a 3.5mm extension cord, you could measure temperature in the oven, or other places … but I don't know if the longer cable will mess up the precision … :)

    • Cory_S

      Something tells me this plastic electric probe probably shouldn't go in your oven... or "other places"

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  • qu4ttro

    strikes me as pretty useless...

  • Dan

    I think it really cool that so many phone accessories are being created, especially the accessories like this one that make me shake my head and wonder why in the hell I would care. It's awesome that physical products for tiny niche markets are actually being produced at such ridiculously low prices.

  • Medlir

    Some people do weather/storm tracking and reporting. OpenWeatherMap could have detailed down to street level weather data. Other people just like knowing what the actual temp is in their home/office/etc before messing with the thermostat. Maybe some people just want to tag social media posts with not only location but temperature data as well. The more data you have available, the more you can do with it, whether other people see the same use for it or not.

    • pfmiller

      I don't think these temperature readings will be of much use for OpenWeatherMap, or anyone else. How do you know if any given reading is of the actual outdoor temperature or if it's the temperature of their office? Or maybe the temperature is of their battery, or their leg.

      • Medlir

        Average a given area and discard outliers would be obvious thing. You can also make the reporting operation a user action rather than automatic with instructions on when/how you should make a report, and require registration to encourage only people who truly want to contribute accurate data to be able to do so. These are all common things.

  • Asphyx

    LOL I have only three Temperatures I actually use...
    Too Hot
    Too Cold
    I'm FIne

    More detail than that I really don't need especially from my phone! LOL

  • Chris Vander Maas

    Holy Pointless batman! There are more accurate, stand alone digital thermometers available for less money. Heck, you can get a cheap laser thermometer that has the same accuracy for the same money from Home Depot!

  • A Guest

    $45 incl. shipping -.-

    I get a digital thermometer for 2 bucks in a store next to me...

  • dancarm

    Consistently off by about 4 degrees Celsius (which they manage to spell "Celcius" in the app) over a proven standalone digital thermometer. On my iPad and my Android phone, ten inches apart, it gives different readings. A waste of money.