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We bought this thermometer for our newborn who is under 2 months old. For newborns under 3 months, a fever of 100.4 is an emergency. This thermometer indicated that our newborn had a fever on 3 separate occasions, one reading as high as 100.9. This caused us to go to the emergency room where they drew blood (which is very hard on a baby under two months). They had to try twice to draw her blood because her veins are so small. They also took urine samples to rule out a UTI and talked about a possible SPINAL TAP to find out if she had meningitis! At this point, we wondered if the thermometer was the problem and we bought a rectal thermometer at CVS. The Kinsa thermometer consistently read high compared to the CVS thermometer, as high as 2 degrees. Based on the CVS thermometer, our baby never even had a fever! This was also verified at the hospital when they re-checked her temperature. This thermometer is highly inaccurate and needs to be taken off the market. Had we not thought to verify its accuracy, we may have put our newborn through more invasive procedures (spinal tap) that were unnecessary.

Horrible software & hardware. At least now they’re selling your data maybe about your sick child to Clorox! “Being able to target ads in this way is a big shift from even seven years ago, when the onset of cold and cough season meant buying 12 weeks of national TV ads that “would be irrelevant for the majority of the population,” Mr. Sarma said. The flu ultimately reaches the whole country each year, but it typically breaks out heavily in one region first and then spreads slowly to others.” Original Kinsa stopped working when I went from an iPhone 5 to an iPhone 6. Kinsa never mentioned this in any app update notes. I complained so they sent me a replacement (eventually THREE REPLACEMENTS) that were all supposed to be iPhone 6 compatible. All failed with Error 3 4 despite two being the proper lot number. Why the sent me the first replacement that even they knew was incompatible? Beyond me. They even refunded my money and sent another Kinsa. It didn't work either and never replied to me. How are they in business if they can't even test the product before the ship it after multiple failures? I don't understand. A cheap drug store thermometer works better and is faster. The original Kinsa that sometimes worked with my iPhone 5 was slow and flakey. Totally unreliable. Who would have guessed the "iPhone 6 compatible" update would be worse and completely non-functional. Kinsa is 0-4. Hard to say that's a fluke.

The app was OK at the beginning. Everything worked as advertised, and it was syncing nicely with HealthKit. As far as accuracy goes, this thermometer is about 2°F warmer than any of my other thermometers, both oral and ear types. Even the Kinsa Stick shows about 2 degrees lower. I can’t say for sure if it’s inaccurate, maybe all the other thermometers I own have drifted too much. But the fact that it stopped working with the app after 1 day is a deal breaker. The whole point of the smart thermometer is to automatically log your vitals so you don’t have to remember. I’ve had a low-grade fever for 6 months, my doctors want me to track them. Since the ear thermometer appears to be inaccurate and the quality control of both the ear and app seem to be suspect, I can not recommend any Kinsa product. I’ve tried it on multiple devices and platforms and followed all the instructions on re-syncing the device. The app sees that the device is connected, but it never sensed or logs the readings. After one day, this “smart thermometer” is just an inaccurate $40 ear thermometer. DO NOT BUY ANY KINSA PRODUCTS. Save your money, ask your doctor for a recommendation for a cheap and accurate thermometer, and log it the old fashioned way.