Fever Flash Thermometer - up&up™
$5.79
In Stock
Eligible for registries and wish lists
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Guests are saying
The thermometer has received numerous reviews highlighting its ease of use and features like a flexible tip and color-coded display for temperature readings. However, many guests have expressed concerns about its accuracy, reporting inconsistent readings that can vary significantly from one use to the next. While it is designed to be user-friendly and comes with disposable covers, the reliability of the temperature readings has left many guests disappointed, leading to a lack of trust in its performance.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
3.3 out of 5 stars with 601 reviews
quality: 1.6 out of 5
value: 1.72 out of 5
36% would recommend
211 recommendations
3 out of 5 stars
Thumbs down graphic, would not recommend
1 August, 2026Verified purchase
(no review title)
battery is low
1 reply from the Product Manufacturer team - 7 days ago
Hi Tina, thank you for your feedback. We’re sorry to hear the thermometer’s battery is low. Please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
Thumbs down graphic, would not recommend
25 July, 2026Verified purchase
Very unreliable
I could take my temp 4 times and each one would be different.
1 reply from the Product Manufacturer team - 16 days ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
Thumbs down graphic, would not recommend
25 July, 2026Verified purchase
Inaccurate
This is a broken toy. It said I was 102. So I ran it again and it was 100.2. So I ran it again and it was 98.1.
1 reply from the Product Manufacturer team - 16 days ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
7 July, 2026
non functional product. inconsistent readings.
non functional product. changes its reading with every use. I plan to request a refund.
1 reply from the Product Manufacturer team - 1 month ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
2 out of 5 stars
28 June, 2026Verified purchase
Low battery
The battery is low when I first opened it.
1 reply from the Product Manufacturer team - 1 month ago
Hi Karen, thank you for sharing your experience. We're sorry to hear that the thermometer appeared to have a low battery right out of the package. We appreciate your feedback! Please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
Thumbs down graphic, would not recommend
23 June, 2026Verified purchase
Completely inaccurate temperature readings
This thermometer is so inaccurte it's scary. The digital reading literally jumps 2 degrees higher as soon as it beeps that it's ready. I've compared it to the Vick's thermometer, a forehead thermometer, and the Boncare thermometer, and it is consistently two full degrees higher than reality. Not useful whatsoever.
1 reply from the Product Manufacturer team - 2 months ago
Hi ladybug, Thank you for taking the time to share your experience. We're sorry to hear the thermometer provided readings that differed from your other devices, as we understand how important accurate temperature measurements are. We appreciate your detailed feedback and encourage you to contact Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
8 June, 2026Verified purchase
Inaccurate
Inaccurate readings. Each use gives a different result.
1 reply from the Product Manufacturer team - 2 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
Thumbs down graphic, would not recommend
6 June, 2026
Inaccurate
I took my temperature. The display said 100.9. That didn't sound right, to I took it again with my husband's thermometer. 99.3. I took it with an old mercury thermometer. 99.3. I took it with the Fever Flash. 100.5. It's not useful for me if it isn't accurate or consistent.
1 reply from the Product Manufacturer team - 2 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
2 out of 5 stars
4 June, 2026Verified purchase
(no review title)
Results are very inconsistent. Can’t trust. Will need to purchase another one
1 reply from the Product Manufacturer team - 2 months ago
Hi Melissa, I’m sorry to hear you had trouble using the thermometer. I know how frustrating that can be. Please rest assured that when the device starts up, it briefly shows a half-battery icon as part of its routine check. This doesn’t reflect the actual battery level and doesn’t mean the battery is low or running out.
5 out of 5 stars
Thumbs up graphic, would recommend
27 May, 2026Verified purchase
Thermometer
Thermometer easy and accurate
1 reply from the Product Manufacturer team - 3 months ago
Hi Mo, thank you for your review! We’re happy to hear the thermometer was easy to use and provided accurate readings. We appreciate you taking the time to share your experience with us. Please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
Thumbs down graphic, would not recommend
22 May, 2026Verified purchase
Inconsistent Temps
This was inconsistent and temps would jump around. Would not recommend.
1 reply from the Product Manufacturer team - 3 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
Thumbs down graphic, would not recommend
19 May, 2026
Flex Tip is not Effective
The flex tip shifts and makes it impossible to get consistent readings making most attempts fruitless low readings. One out of ten times a user will get it placed just right and it wont shift and will get the accurate reading, but if you use this just one time and accept the results you could easily have a 104 degree fever but be told by this thing that it's only 101 despite following the instructions to a tee. It gets worse. You might end up finding a good placement and technique, but the flex tip starts to get floppy and any normal pressure you apply causes the sensor to curl back out of the heat pocket, producing consistently low readings again. It gets worse yet, once you end up with yet another low reading you have to listen to it beep 9 times before you can turn it off/on and try again. It becomes very tedious when trying to track a high grade fever. It's built well, but it's like a car with square wheels.
1 reply from the Product Manufacturer team - 3 months ago
Hi Brian, I’m sorry to hear you had trouble using the thermometer. I know how frustrating that can be. Please rest assured that when the device starts up, it briefly shows a half-battery icon as part of its routine check. This doesn’t reflect the actual battery level and doesn’t mean the battery is low or running out. Please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
2 out of 5 stars
Thumbs down graphic, would not recommend
11 May, 2026Verified purchase
Time delay
It takes a while to read.
1 reply from the Product Manufacturer team - 3 months ago
Hi DK, thank you for sharing your feedback on the thermometer. We understand that waiting longer than expected for a reading can be frustrating, especially when you need quick results. Your comments are appreciated and will be shared with our team as we work to improve our products. Please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
Thumbs down graphic, would not recommend
4 May, 2026Verified purchase
(no review title)
It seems very easy to use but always read 99° or 100°
1 reply from the Product Manufacturer team - 3 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
3 May, 2026
(no review title)
Wasnt in my order just the box
1 reply from the Product Manufacturer team - 3 months ago
Hello Denise, thanks for letting us know. We’re sorry to hear the thermometer was missing from your order and that only the box arrived. We appreciate you taking the time to share that with us. Please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
29 April, 2026Verified purchase
Dont buy- doesnt work.
Just like all the others reviews, reading is off. Test on a well person before giving to a sick person.
1 reply from the Product Manufacturer team - 3 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
Thumbs down graphic, would not recommend
29 April, 2026
Inaccurate
Wish I would have read the reviews first. Just like everyone else is saying it doesn’t work. A completely different reading each time. I attached photos of each reading I did in a row. This is super unhelpful.
1 reply from the Product Manufacturer team - 3 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
27 April, 2026
(no review title)
This thing had me questionning my sanity for days. How could I have a fever and NO other symptoms. I should have read the reviews first. Save your money and the urgent care copay to confirm youre fine.
1 reply from the Product Manufacturer team - 4 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait about 2 minutes between the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
Thumbs down graphic, would not recommend
22 April, 2026Verified purchase
don't waste your money
the readings are inaccurate!
1 reply from the Product Manufacturer team - 4 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait for the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com
1 out of 5 stars
Thumbs down graphic, would not recommend
18 April, 2026
(no review title)
Not reliable- each scan is different. Literally every read is different
1 reply from the Product Manufacturer team - 4 months ago
Thank you for taking the time to share your feedback regarding the temperature readings from our thermometer. We sincerely apologize for any inconvenience this issue has caused you. We value your feedback and are committed to resolving this concern promptly. In order to address the temperature inaccuracy you've experienced, we recommend following these troubleshooting steps to ensure accurate readings: Multiple Readings: When using the thermometer, it's important to take multiple readings. Wait for the 'Beep': Ensure that you wait for the thermometer to produce a consistent beep before noting the temperature. This beep indicates that the thermometer has stabilized and the reading is accurate. For further assistance, please don’t hesitate to reach out to Target Guest Services at guest.service@target.com