Genius Colour-Changing Stickers Tell You When You Need To Reapply Suncream

And people are loving these genius stickers designed to alert you when it's time to reapply suncream. You can watch how it works below:

The company, SPOTMYUV, have created what's been called the first clinically-proven UV detection sticker. Thanks to its super clever technology, it can tell you when your suncream is no longer working.

So how does it work?

Well, when you first apply the sticker, it's purple, and turns clear when suncream is applied and the sticker is in direct sunlight. However, when it's time to reapply your sunscreen, it'll gradually revert back to purple once again. Genius!

"Our non-toxic dye turns purple in UV light. This dye only senses light, which is why we say SPOTMYUV is solar-powered," says the company.

"When you apply sunscreen and face SPOT to sunlight, the UV Sensing Ink recognises that you have applied enough SPF, and it turns clear."

The stickers are also water resistant, sweat resistant, towel resistant and are 'designed to last through your wear and tear'.

It's recommended to place the sticker in an area exposed to the sun - SPOTMYUV recommend the upper arm, as long as it's not covered by your clothing.

The sticker is also transparent and won't leave a tan mark.

People are already leaving glowing reviews for the stickers, with one person writing online: "Amazing product! I am very fair skinned and usually get burned when outside because I forget to reapply. This product completely eliminates the need to keep track of when you last put on sunscreen."

While another said: "Works nice, the first time I have been at the beach without getting a sunburn since a long time."

A third added: "These ingenious little sticky dots will let you know when you need to re-apply sunscreen to keep from burning in the sun. I've been the victim of skin cancer and I try to stay safe when I'm out in the sun.

"These are great little reminders of when to re-apply the sunscreen to keep from burning. I have been surprised when they signalled it was already time. I would have waited to re-apply and then been put at risk of skin damage. I'm grateful for these cute little reminders."

Another commented that their stickers stayed on, despite being in and out of the water.