Do Mosquito Repellent Bracelets and Gadgets Work?

The whole reason Notch exists is that most people would rather do almost anything than put on bug spray. I understand that completely. It’s also why the gadget aisle does so well: a wristband, a sticker, a little box that hums, and you never have to touch the stuff.

I’ve read the research on all of them. It is not close.

Start with one number

The verdicts

• Skip Ultrasonic devices and apps

  Mosquitoes don’t flee high-pitched sound. All ten field studies in a Cochrane review found no effect, and a phone app playing the same noise does no better.¹

• Skip Bracelets and wristbands

  A band protects the skin right around it, and nothing else. In the classic head-to-head test of repellents, wristbands offered no protection at all.² A 2017 trial of three bracelets, including one made with geraniol, found none of them reduced how many mosquitoes were drawn to the wearer.³ One wristband maker had to settle with the FTC over its claims.⁴

• Skip Stickers and patches

  Same problem as a bracelet, stuck to a shirt. It can’t reach a child’s arms, legs or face. Put a repellent on their skin instead, with your own hands, and keep it off their hands, eyes and mouth.

• Skip Bug zappers

  They kill bugs, which is why they feel like they’re working. In a backyard study, fewer than 1 in 400 of the insects killed were biters.⁵ The light draws the wrong crowd.

• Skip Scented balls and pouches

  A scent on the table can’t hold repellent against your skin, and outdoors a breeze carries it off. The oils inside fade fast too.

  How quickly citronella wears off, on BugRepellent.Guide

  BugRepellent.Guide is a repellent research site run by the Notch team.

• Only up close Citronella candles

  A little protection right beside the flame, and it fades with every foot of distance. Nice on the table, not a plan.

  How citronella compares to geraniol

What to use instead

Every gadget above fails for the same reason: a repellent has to be on the skin a mosquito is about to land on. So the thing that works is the thing the gadgets promise to replace. The fix is to make it something you don’t mind putting on.

That’s what I made Notch Nourish + Defend to be: a 5% geraniol lotion that lives next to your skincare, not in the garage. It repels mosquitoes and ticks, spreads evenly over ankles, neck and behind the ears, and leaves a light rose scent instead of a chemical one. Reapply every hour; that’s what the research supports and what the label says.

Two things help around the yard, and neither one plugs in. A fan across your seating scatters the scent trail mosquitoes follow. And dumping standing water once a week means fewer hatch nearby; for water you can’t dump, a Bti mosquito dunk stops larvae before they become biters.

Why a lotion, not a sprayHow fans keep mosquitoes away

Want to go deeper? Here’s the full plan for keeping mosquitoes off your patio, and our guide to natural repellents that actually work.