Etzel is offering the app for free on the App Store for those who want to create up to five stickers. If you want more stickers, there is a $1.99 in-app purchase to unlock the unlimited pack.

The idea is that these stickers will tell you when you need to reapply long before you are alerted the old fashion way -- a burning, red sunburn. I tested UV stickers from SpotMyUV.

These stickers stay on well, even when you're sweating and swimming. According to the brand, each sticker is rated for 12 hours, so you don't need to change out the sticker every time you reapply.

We see a lot of cutesy notebook stickers as we trawl the web for news, but finally we have seen one worth writing about. Yes, it is the sticker the glowing Mac apple was made for: Iron Man’s ...

With iOS 17 you can create a Live Sticker from your photos When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works .