Frida Baby 3-in-1 Rectal, Underarm & Oral Thermometer for Kids, Digital Baby Thermometer for Infants, Toddlers, & Kids, Quick &…

Across the reviewers we read, this Frida 3-in-1 contact thermometer is the most-recommended choice specifically for newborns. In high-trust r/beyondthebump threads, parents repeatedly call the Frida rectal thermometer the most accurate way to read a small infant's temperature, with one noting it gives the most accurate reading according to their research and another stating plainly that 'the butt is the best way reading.' r/BabyBumpsCanada reviewers highlight the deliberately short probe and wide base designed to prevent inserting it too far.

The design draws consistent praise: a quick read with an automatic recheck, a parent-proof stopper, LED lights and a compact carrying case, per Target's product description and verified-purchase reviewers. Its 4.6 Amazon average across roughly 3,745 ratings reinforces the positive community sentiment.

The caveats are real. babylist.com surfaces a reviewer who got alarming low readings (94-95) across multiple attempts and was told by a pediatrician to recheck, a reminder that no single device should be trusted blindly. The rectal method itself is uncomfortable for some families to use, and a few reviewers note accuracy can drift over time. Still, for the under-three-months window where accuracy matters most, it has the clearest high-trust endorsement.