Answers To Frequenty Asked Questions

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All your questions answered

Frequently Asked Questions


What is AYO’s 60-day money back guarantee?

We want to make sure you’re happy with your purchase. However, in case you are not satisfied with your AYO and would like to return it for a full refund, and you have purchased it on our website, you can do so within 60 days from the day you received your complete order. The product must be returned with its original packaging and in good condition (as good as new). To process your refund, please contact us at

We deliver to the US, Canada, Europe, Australia, New Zealand, South Korea, Japan, Singapore, Thailand, Indonesia, India, Vietnam, Taiwan, Saudi Arabia, UAE and South Africa.

When an order is placed on our website, we ship it from one of the warehouses we use, depending on where the delivery is. We use warehouses in the United States, the European Union and Hong Kong. If the delivery is in any of these regions or in Canada, in most cases you will not be asked to pay anything for duties or taxes.


Please take into account that you are responsible for any costs for duties, taxes and other applicable costs or rules regarding importing products into your country. In case you have any questions, feel free to reach out to us at We would love to hear from you and assist you! 

We usually fulfill orders in the US and Canada from our US warehouse, in Europe from our EU warehouse, and to other locations either from our Hong Kong or EU warehouse.

For US or European orders, the usual delivery time is 2-5 business days, and for the rest of the world 3-10 business days, depending on the destination country.

AYO comes with a 2-year warranty in the EU, and a 1-year warranty in the rest of the world.

You can purchase an AYO device from our website using a credit or debit card or PayPal.

Your data is completely secure. Any personal data we collect is solely used to facilitate and enhance your experience with AYO to better suit your needs. Such information will not be sold, licensed, distributed or otherwise provided to third-parties without your express written consent, except to process payment information. You can read our Privacy Policy from here.

AYO Wearable

How long should I wear AYO for?

A typical AYO session is 20 minutes. AYO was designed in a way that it seamlessly fits with your lifestyle, allowing you to continue with your daily routine while wearing it (e.g. cooking, working on the laptop, brushing your teeth, etc.)

No, you need to wear AYO with open eyes for the light to be effective.

You can use AYO with most common prescription glasses’ frames. You can do this by putting AYO on top of your glasses and adjusting the flexible nosepiece. However, for best results, we recommend using AYO without prescription glasses, as they can make AYO less effective.

AYO emits blue-turquoise light of approximately 470 nm. AYO’s irradiance levels (i.e. light strength) are up to 250 µW/cm2 and can be considered as an equivalent to a 10,000 lux of bright light emitted by a typical light box.

AYO’s light has been carefully tested and is fully certified for photobiological safety by the world-renowned independent certification body TÜV Rheinland.

As with any light therapy device, certain adverse reactions such as discomfort, headache, dry mouth, eye-strain, nausea or hyperactivity can be experienced in rare occasions. These reactions are generally mild and transient in nature.

No, you do not need to use a smartphone or install the AYO app in order to use AYO.

No, AYO is a consumer wellness device, which is not intended to diagnose, cure, or treat any medical condition.

Science & Results

Is your technology proven?

AYO is based on light therapy and the science of Chronobiology. Light therapy is a widely-used and recognized method for improving mood, energy levels and sleep quality, backed by thousands of peer-reviewed articles and studies.


Additionally, AYO is participating in numerous clinical studies with leading institutions worldwide. Two of them, with the US Department of Defense and the University of Reykjavik, are already published and have shown AYO to be effective in decreasing sleep problems, improving sleep quality and increasing performance. 


You can learn more about the science behind AYO on our Science page.

When will I start to notice results?

Some of our customers report experiencing positive effects on their energy levels and mood already after just one session with AYO. Others need several days to a few weeks in order to feel a lasting change in their sleep quality and circadian rhythm. We recommend daily usage for at least 3 weeks in order to start feeling the desired effects.

Typically, the optimal time to use AYO is in the morning in order to reset your circadian rhythm. However, the optimal time can vary from person to person, and will depend on your own circadian rhythm, as well as your desired health & wellness goals. The AYO app can give you helpful guidance on when to use AYO, when to avoid light, and other important metrics.

1) Immediately or shortly after an AYO session, your energy levels and alertness levels can be increased. This effect happens because AYO works in a similar way to natural sunlight, suppressing the production of the sleep hormone melatonin and, thus, making you more alert and awake.


2) Due to the suppression of melatonin at a specific time of the day-night cycle, you can also actively adjust your circadian rhythm in order to adapt it to your lifestyle. That means that AYO can help your body align faster to a new time zone or a demanding shift work schedule as well as make sure that you wake up refreshed and ready to welcome the day on an early Monday morning.


3) Lastly, by suppressing melatonin during the day, you help your body produce more melatonin during the night for a good night’s sleep.

Based on your circadian rhythm, desired effect and lifestyle, the app can guide you fully on how to use AYO for achieving your desired goal. Alternatively, you can check out the manual of your AYO or write to us. We’d love to hear from you and help you get the most of AYO.

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