This USB-C accessory gave my iPhone and Android an unexpectedly useful superpower


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Heat It Insect Bite Healer

ZDNET’s key takeaways

  • The Heat It is available on Amazon for $30 for a limited time.
  • It heats up from your smartphone and reduces swelling and itchiness from bug bites.
  • While its power consumption is modest, it will take some charge from your phone.

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As someone who spends a lot of time outdoors (and someone who got hit with Lyme disease), it’s astonishing how often I forget to apply insect repellent. Just the other night, I spent the last half of a five-mile walk in a thick, annoying cloud of houseflies. Irritating, but at least they don’t bite.

Not like horseflies… Now those things know how to bite! I’ve watched them land on my sleeve and start gnawing through the fabric. These things are vicious, the bites are super itchy, and scratching them increases the risk of them getting infected. 

Also: My new favorite keychain holder can carry up to 14 keys (and is trackable by phone)

So, anything that can help heal insect bites is something I’m interested in testing. So, when I came across a product called Heat It, a smartphone-powered insect bite healer, my curiosity was piqued. It’s not something I had ever heard of before, so imagine how interested I was when I discovered it’s a tiny dongle that fits onto your keychain.

Here’s how it works. First, you download the app to your phone (both iOS and Android versions are available), plug the dongle into your smartphone (there’s a USB-C for Android and newer iPhones and a Lightning version for older iPhones), use the app to heat up the end of the dongle to a maximum of 124°F/51°C, then press the end onto the bite, and wait for the timer to say the treatment has completed.

Heat It is the right size for attaching onto your keychain.

Heat It is the right size for attaching onto your keychain.

Adrian Kingsley-Hughes/ZDNET

The app also has different modes for adults and children, a sensitive skin mode, and short, medium, and long application times.

Don’t worry if this sounds complicated; the app guides you through it all. 

Applying heat to an insect bite has been proven to reduce swelling, especially if you do it right after you get bit. According to the manufacturer, the device is medically proven to work, and each application takes less than 0.1% of your smartphone battery.

Also: Why doesn’t my iPhone have a solid-state battery yet? I found out (and can’t even be mad)

I’ve tested this on a number of bites: horsefly bites, mosquito bites, dog flea bites, and other random insect bites I found, and yes, it works. Really well, actually — far better than any over-the-counter cream or ointment I’ve used (and I’ve used a lot). I used it at the maximum duration setting, and while the business end gets mildly hot, it wasn’t in any way painful. 

This is the USB-C version that works with Android smartphones and newer iPhones.

This is the USB-C version that works with Android smartphones and newer iPhones.

Adrian Kingsley-Hughes/ZDNET

I did find that the itch-busting effect lasted a few hours, so for more irritating bites, I needed multiple zaps throughout the day, and for particularly itchy ones, I found zapping them before bedtime stopped me from sleep-scratching the bites.

Also: This USB-C accessory gave my Android and iPhone thermal imaging powers – and it’s on sale

I like the tiny form-factor of the Heal It, and that it doesn’t have any use-by dates or need charging or any ongoing care. As long as I have a smartphone, I’m ready for those pesky bites. 

Thermal image of the business end of the Heal It in action.

Thermal image of the business end of the Heal It in action.

Adrian Kingsley-Hughes/ZDNET

ZDNET’s buying advice

At $40 (or $30 on sale at the time of writing), Heat It is not cheap, but this is a price I’m happy to pay for effective bite relief. I’ve probably saved more than that in creams and ointments, and definitely had fewer side effects from bites going bad because I can’t resist scratching them. 

If you’re someone who ventures into Mother Nature, and you have to contend with bitty things, I highly recommend this unusual product. It’s got a place in my kit for sure.





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Amazon Fire Phone Jeff Bezos

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Follow ZDNET: Add us as a preferred source on Google.


ZDNET’s key takeaways

  • Amazon is reportedly developing a new Fire Phone.
  • The previous model had several issues, including an inferior app store experience.
  • Under new supervision (and with more experience), Amazon can do better this time.

Well, I don’t know about you, but I certainly didn’t have “new Amazon smartphone” on my 2026 bingo card. As it turns out, according to Reuters, the retailer may be developing a new smartphone, internally known as “Transformer.” 

Those familiar with the industry will instantly draw parallels to Amazon’s previous smartphone effort, the Fire Phone from 2014. Appropriately, that phone ended up as part of a fire sale about a year later.

Now, in 2026, with no fewer than five phone brands in the US — Apple, Samsung, Google, Motorola, and OnePlus — Amazon faces a lot of competition. In fairness, it also has two fewer platforms to compete against. In 2014, Windows Phone and BlackBerry were still very much part of the smartphone conversation; these days, not so much.

The AppStore problem

But there’s one mistake Amazon made in its first effort that will absolutely torpedo its chances at succeeding — the Amazon AppStore and specifically the decision to forego Google Play services. Google is simply too valuable in too many lives to not support the platform. Oh, and the Amazon AppStore is terrible.

Also: What’s right (and wrong) with the Amazon Fire Phone

It has admittedly been a few years since I last inventoried the Amazon AppStore, but when I last checked, the Amazon AppStore was a wasteland of half-supported or unsupported apps, with two notable exceptions. Finance, home control, and communication apps were either absent or had not received updates for years prior.

The only apps in the Amazon AppStore that remained up to date were productivity apps (largely powered by Microsoft) and streaming apps. Those two categories work very well on the cheap, underpowered hardware that Amazon usually launches, and that’s fine. A coffee-table tablet is a nice thing to have lying around.

A spark of hope

Amazon Fire Phone

Liam Tung/ZDNET

But a phone is another animal entirely. If a tablet is a device to entertain, a phone is a device for everything else. One of the key reasons Windows Phone failed was its lack of an app ecosystem. The Senior Vice President of Devices and Services,  Panos Panay, is very familiar with that saga, so I’m hopeful that he will make the same arguments to the powers that be at Amazon. 

Honestly, if there is anyone who I think can pull off an Amazon phone revival, it’s probably Panay, who understands design and product development better than most, and to be perfectly honest, he’s my absolute favorite product presenter.

Also: Amazon Fire Phone review: Not a great smartphone

Of course, all of this is early days. This phone is being worked on internally, and even Reuters reports that it could get the axe long before it sees the light of day. Personally, I’m intrigued by the idea, but I sincerely hope that Amazon doesn’t make this the shopping phone it tried to build in 2014. 

If Amazon just wants to make a nice, well-built smartphone, with a skin that pushes Amazon content to the fore, I’m fine with that. But leaving Google behind is a mistake that Amazon cannot afford to make again. Fool me once, and all that.

So, if this phone is to have a chance at success, it needs to embrace Google services so it can be a phone that everyone can use. Amazon has the brand power to make a phone like this work, even up against juggernauts like Apple and Samsung, but it needs to approach this correctly, lest it end up in yet another Fire phone fire sale.





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