Digital sun protection

sun-a-wear device informing about UV index

Our skin is exposed to a lot of stress in the summer. Unfortunately, sun cream is often applied incorrectly or too late. A small sensor, developed in Switzerland, should prevent this in future. 


The Swiss population suffers from skin cancer more often than most other countries. According to Krebsliga, around 3,000 people are diagnosed with melanoma, the most dangerous type of skin cancer, every year. As we all know, the best protection against sun exposure is sunscreen. But sunscreen is not always used correctly and at the right time.

Controlling personal exposure to sunlight

The start-up Ink-U-Beta AG, based in Zug, has developed a new UV sensor called sun-a-wear to control personal exposure to sunlight. According to the media release, the digital sun protection is based on a technology developed at ETH Zurich. The Swiss start-up says its goal is to make it easier for people to consciously deal with the sun and to mitigate negative long-term consequences of increased UV exposure, such as skin cancer and skin ageing.

It was important to me to develop an all-round worry-free device that never needs to be charged. The decision to operate the sensor not with a battery but with a solar cell was only logical.

Samuel Welten, CTO of sun-a-wear

No batteries needed

The digital sunscreen consists of two components: the micro UV sensor, ultra-lightweight at 6 grams and only 4 centimetres long, and an app. The sensor can be worn on a strap on the arm or with a clip on clothing. It measures how strong the UV radiation is. It is waterproof and solar-powered and therefore never needs to be charged. The sensor sleeps for 99.9 % of the time and only wakes up for a few milliseconds to measure the UV radiation and to send this data to the smartphone app via Bluetooth.

Prediction for sun cream application

This allows users to check their UV exposure simultaneously, receive personal sun protection advice and be warned as soon as a critical UV exposure is reached. Using artificial intelligence in the app and based on the personal skin type, a prediction is made as to whether sun cream is needed for the upcoming day.

The data from the app will also afford new insights for research and prevention in the area of UV radiation. To this end, the young company from Zug founded the Sun Aware Institute.

Website of sun-a-wear