The Review Smiths
Retimer 3 Retimer 3
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Retimer 3 4

The Retimer 3 may look like something out of a sci-fi flick but it is in fact a smart wearable device aimed at helping people reset their sleep – wake pattern. Specifically around tackling jet lag, irregular working hours, or just getting better quality rest. It uses a blue-green light that mimics the midday sky to trigger the retinal cells that regulate the body clock (circadian rhythm). Its all well and good being told to get out into sunlight when you first wake up but what if you have to wake up at 2am, well the tech is here to help combat that.

The light is UV-free and delivered via LEDs under the eye, which helps with precise exposure without causing damage or affecting your vision. This device is super lightweight at about 36 grams, so you can wear it comfortably at home, in the office, or while travelling (although you may get a few odd looks).

It has adjustable nose pads with three sizes, so it should fit nicely even if you wear glasses. There is also a companion app for Android and iOS that helps you track progress, set schedules, and integrate with Apple Health or Android Health, which is useful if you like monitoring sleep or wellbeing.

The improved battery life is decent at around five to six hours per charge. So that’s about a weeks’ worth of sessions depending on your settings. The device comes with a pouch, a travel case, and the nosepieces, so you have what you need to use it comfortably and protect it. You shouldn’t expect instant results however, you need daily sessions of around 30-45 minutes to see benefits, especially when adjusting sleep cycle or overcoming jet lag. Even then the results can vary from person to person.

Also some users might find the light exposure uncomfortable at first, especially if sensitive to bright light. It is specialised so the price might seem steep compared with simpler sleep aids. As the 3rd generation of its kind there are some upgrades, including intelligent sleep insights powered by an AI engine, a new half-brightness mode, better light indicators for ease of use and improvements with both the App performance and Bluetooth connection.

Overall, the Retimer 3 is an interesting wearable piece for people serious about improving sleep and regulating circadian rhythm. If you are willing to use it regularly and have the cash to spare, it could make a real difference. RRP $220

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The Retimer 3 uses blue green light therapy to improve sleep, reduce jet lag, and reset body rhythm with regular daily use. However it is pricey and doesn’t provide instant results.
  • Clinically backed blue green light improves sleep and jet lag
  • Lightweight and comfortable to wear
  • Adjustable nose pads fit over glasses
  • Handy companion app for schedules and progress tracking
  • USB C charging and decent battery life
  • Wearable over glasses and can still see whilst using
  • Brightness can be uncomfortable for some users
  • Needs regular sessions to see results
  • Fairly expensive compared to simpler sleep aids
  • Cannot be worn whilst driving or charging
  • Not shower or waterproof