What just happened? Apple’s long overdue AirTag trackers have finally been revealed. When they go on sale starting April 23, buyers will be able to personalize their trackers with a free engraving consisting of up to four numbers, letters and / or emoji. The customization option is live on Apple’s website and predictably, folks are already testing the waters to see what Apple will – and won’t – engrave on its new product.

As The Verge has discovered , Apple won’t allow the horse emoji followed by the poop emoji, but for some reason, the poop emoji followed by the horse emoji is acceptable.

Similarly, most common four-letter “dirty” words that you can think of are also off limits. You can tinker around with the personalization option over on Apple’s website; just select AirTag then Add engraving.

Apple’s new AirTag tracker starts at $29 individually, or $99 for a pack of four. They’re compatible with most newer iDevices running iOS 14.5 / iPadOS 14.5 or later.

Samsung earlier this year launched its own tracker. The $30 Samsung Galaxy SmartTag is similar in functionality to Tile’s offering, but only works with Galaxy phones. A couple of weeks back, Samsung added a new model to the mix, the SmartTag+ , that utilizes ultra-wideband technology to help with tracking, for an additional $10.