Fever Flash Thermometer - up&up™
$5.79
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This thermometer has received mixed reviews. Some guests appreciate its accuracy, ease of reading, and useful features like color-coded temperature readouts. However, many guests have reported issues with inconsistent readings, low battery life, and difficulty in operation. It may be suitable for those looking for a basic thermometer but could be unreliable for critical temperature monitoring.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
3.4 out of 5 stars with 539 reviews
quality: 1.61 out of 5
value: 1.73 out of 5
39% would recommend
192 recommendations
1 out of 5 stars
Thumbs down graphic, would not recommend
5 March, 2026
(no review title)
DO NOT BUY. Gives inaccurate readings, constantly reading much higher
1 out of 5 stars
4 March, 2026Verified purchase
(no review title)
Don’t not recommend
1 out of 5 stars
Thumbs down graphic, would not recommend
23 February, 2026
Do not buy
Battery was dead when I purchased and didn’t work. Very Poor quality
1 reply from the Product Manufacturer team - 9 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 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
21 February, 2026
Do not buy
Does not work. All it’s says on each reading is “HI” no number ever.
1 reply from the Product Manufacturer team - 9 days ago
Hi CW13, I’m sorry to hear your up&up Fever Flash Thermometer only displays “HI” and never gives a reading. That’s definitely concerning and not the experience you should have. We appreciate you sharing this feedback so we can look into it and continue improving 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
18 February, 2026Verified purchase
Absolute Garbage
unless you want a guaranteed sick day excuse - don't bother with this thermometer. It consistently read my temp at 101. I finally decided to buy a different brand to compare, and my actual read was 98.
1 reply from the Product Manufacturer team - 15 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 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
12 February, 2026
Wildly inaccurate
Unfortunately, the price is too good to be true. The screen is helpful and turns green if your fever is below 100, and red if it's above, which is helpful for people with vision issues. The problem is, it will give you wildly different temperature readings, even when place in it in the same place consecutively. I took my temperature once and it said it was 97 (which I knew to not be true, my forehead was burning up), I took it again not thirty seconds later, placing it in the same place in my mouth, and it said I was 104. Don't waste your money on this scam product. Positives: - Price Point - Flexible tip made it easier to bit down/keep in mouth Negative - Inaccurate readings (~7 degrees difference within a span of thirty seconds)
1 reply from the Product Manufacturer team - 21 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 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
8 February, 2026Verified purchase
oops. they don't make em like they used to.
instructions unclear. I removed too much. to be fair, they don't make em like they used to. don't make my mistake.
1 reply from the Product Manufacturer team - 25 days ago
Hello, thank you for your honest feedback. We appreciate you sharing your experience and the heads-up for others, especially around the instructions. Feedback like yours helps us continue 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
4 February, 2026Verified purchase
(no review title)
Thermometer is not accurate. On one side of my mouth I have a fever, and on the other side I am fine. Low battery life as well. I recommend paying the extra $3-4 for the Vicks brand
1 reply from the Product Manufacturer team - 29 days ago
Hi Diana, 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 have 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
3 February, 2026Verified purchase
Wildly inaccurate
This thermometer is useless. I’ll check my temp once and it’ll say 101.3 immediately check it again because that seems high and it’ll say that I am a 97.6 that’s a pretty big discrepancy, especially if you’re trying to gauge your symptoms this thermometer is going in the trash. What a waste of money.
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 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
2 February, 2026
(no review title)
inaccurate
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 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
31 January, 2026Verified purchase
(no review title)
Inaccurate, results vary wildly even with proper use
1 reply from the Product Manufacturer team - 1 month ago
Hi Joe, 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 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
24 January, 2026Verified purchase
(no review title)
Inaccurate and inconsistent readings! Deserves a zero!
1 reply from the Product Manufacturer team - 1 month ago
Hello, thank you for your feedback. We’re sorry to hear the thermometer was inconsistent and understand how frustrating that can be. Your input is appreciated and helps highlight where the product fell short. 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 January, 2026Verified purchase
reads high
This thermometer reads very high and is inaccurate. It made me think I had a fever for an entire day until I took my temperature with 2 other thermometers which were consistent with each other and showed a much lower temperature.
1 reply from the Product Manufacturer team - 1 month ago
Hello Lindsay, thank you for your feedback. We’re sorry to hear the thermometer gave inaccurate readings and understand how concerning that can be. Your input is appreciated and helps highlight where the product fell short. 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
18 January, 2026
Awful and dangerous
Like so bad. Told me I had a 104 temp, almost went to ER.. I bought a new thermometer and it’s 102. It was even reading my partner who isn’t sick as 99.6
1 reply from the Product Manufacturer team - 1 month ago
Hi Kathy, thank you for sharing this. We’re sorry to hear the readings were inconsistent and caused unnecessary stress. For safety, we recommend confirming readings with a second thermometer and following your medical provider’s guidance if symptoms persist. Please reach out to Target Guest Services at guest.service@target.com so they can assist further.
1 out of 5 stars
Thumbs down graphic, would not recommend
17 January, 2026Verified purchase
Do not buy
I’m pregnant and have been sick. I had a feeling this thermometer was off. It was reading my temps all over the place. Almost cost me a trip to the ER it was reading my temperature so high. Ended up buying a few others to confirm my suspicions that this one was in fact running high
1 reply from the Product Manufacturer team - 1 month ago
Hi Autumn, thank you for your review. We’re very sorry this thermometer produced inconsistent readings and caused added stress, especially while you’re pregnant. Please reach out to Target Guest Services at guest.service@target.com so they can assist you further.
1 out of 5 stars
14 January, 2026Verified purchase
Inaccurate and slow
Read my son’s temp as 95.4 and 95.1… that’s clearly inaccurate! Read mine as 98.2 but it took forever to get there. Not sure why I cannot return it either?!?!
1 reply from the Product Manufacturer team - 2 months ago
Hello MamaM, thanks for sharing your feedback. That’s really frustrating when a thermometer isn’t accurate or timely. We appreciate you letting us know and 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
12 January, 2026Verified purchase
(no review title)
Horrible and unreliable! The thermometer shows inconsistent readings. All within a three minute window I had 97.7, 101.7, and 99.3 and it never became consistent. Shouldn’t be on the shelves.
1 reply from the Product Manufacturer team - 2 months ago
Hello Seasidegirl, thanks for sharing your feedback. Sorry it gave such inconsistent readings, that’s definitely frustrating. We appreciate you letting us know and 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
7 January, 2026
Junk
Low battery right out of the box. Also, said my temp is 94.4 degrees. Obviously that's wrong. Have covid and trying to monitor my temp. Very disappointing
1 reply from the Product Manufacturer team - 2 months ago
Hello Bizzleboo, thanks for sharing your feedback. Sorry it gave inaccurate readings right out of the box, that’s definitely frustrating, especially when you’re trying to monitor your health. We appreciate you letting us know and please feel free to reach out to Target Guest Services at guest.service@target.com for further assistance.
1 out of 5 stars
1 January, 2026Verified purchase
Absolute Worst!! Deserves 0 stars.
Worst thermometer on the market. One minute reads 97.6 next it reads 99.5??? Idk how there could be an almost 2 degree different in a matter of a minute. Don’t waste your money.
1 reply from the Product Manufacturer team - 2 months ago
Hi Ashley, we understand your concern. For accurate readings, please follow the manual and wait 2 minutes between measurements. If issues continue, Target Guest Services can assist.
1 out of 5 stars
Thumbs down graphic, would not recommend
31 December, 2025Verified purchase
(no review title)
Waste of money. Choosing a number you think it should read would be just as effective. Took 3 readings one after another and got readings ranging from 96-101… useless!
1 reply from the Product Manufacturer team - 2 months ago
Hi Alison, that definitely sounds frustrating. Inconsistent readings aren’t expected, and Target should be able to help with a return or exchange so you’re not stuck with something unreliable.