Tech
Best Red Light Therapy for Hair Growth: WIRED-Approved (2026)
Hair loss isn’t always dramatic. It can be incremental. You start noticing a bit more scalp in harsh bathroom lighting; a tiny bald spot when you tie your hair up in a ponytail. The shower drain is more clogged than usual. Not long ago, hair loss treatments meant topical remedies, supplements, or a flight to Turkey. Luckily, red light therapy brings the potential for hair regrowth into your home—no clinical appointment required.
Beyond skin rejuvenation, research suggests red light therapy can help energize hair follicles, increase blood circulation in the scalp, reduce inflammation, and lower dihydrotestosterone levels—a hormone that causes hair loss and thinning. Red light therapy also supports adenosine triphosphate (ATP) production, which helps provide oxygen and blood flow to the scalp and triggers follicles to remain in the hair growth phase.
To determine the best red light therapy for hair growth, I tapped three WIRED tech reviewers who’ve dealt with hair loss themselves. We assessed red light therapy caps, hands-free helmets with full scalp coverage, and low-level laser therapy or photobiomodulation devices for 16 weeks. Along the way, we reviewed the research, spoke with dermatologists, and tracked ease of use. These are the favorites that produced meaningful results and earned our trust.
Be sure to check out our other hair care guides, including Best Dry Shampoos, Best Heat Protectant Sprays, and Best Hair Dryers.
Jump to
Best Red Light Helmet
CurrentBody’s LED Hair Growth Helmet is a wearable, cord-free, Bluetooth-enabled device aimed at improving hair’s density, thickness, and overall condition. Each panel on the helmet has 12 red lights (120 total), which are on a spectrum of 620 to 660 nanometers (nm). The 620-nm red light helps improve scalp health by promoting circulation, and the 660-nm red light penetrates deeper, reaching through the epidermis and dermis to the hypodermis, where it stimulates growth and repair at the follicle root. According to CurrentBody, you only need to use the device for 10 minutes a day, and you’ll see results within 12 weeks.
My hair grows famously slow. I got a pixie cut in the spring of 2011, and my hair did not touch my shoulders until the end of 2013. My hair is also super fine. It tangles easily and often breaks off (my ends are chronically dry and split). After 12 weeks, I didn’t notice a huge difference in length (and I got a haircut halfway through testing), but I did notice that my hair seemed to be sprouting new follicles along my scalp and sideburn area in particular. I started to see small baby hairs along my hairline that I had never seen before. My stylist commented that my hair felt thicker, and I noticed less breakage and hair caught in bristles when brushing. My balding roommate also tested it (although not daily like me) and said that his hair felt thicker and that there was new growth around the scalp.
The helmet comes in two sizes: medium for a skull circumference of 21.3 to 23.2 inches, or large, for 23.3 to 25 inches. (I opted for medium, and it was too large for my head size.) The device sits on a base and is charged via a USB-C cord. It takes about three hours to fully charge, and it stays on a single charge for about a week. The device is powered on by the press of the single button located under the charging port. The circular earmuffs protect sensitive ears with a cushy, removable faux leather cloth, and they can be adjusted several inches up or down to ensure a comfortable fit. The screen on the right earmuff indicates the time left in the treatment session, and the helmet automatically turns off when the 10 minutes are up. You can also connect the device to Bluetooth and play any type of music or video while wearing it, because God forbid I be left alone with my thoughts for 10 minutes a day. Just make sure your hair is clean and dry before use.
My only complaints are that the ear covers aren’t the easiest to adjust while wearing and would oftentimes pull out my hair while I removed or adjusted the helmet. Nevertheless, this is the best red light therapy for hair growth. Just you wait, I’ll look like Fabio on the cover of a romance novel by next year. See full review here. —Molly Higgins
Tech
What to read this weekend: Revisiting Project Hail Mary and The Thing on the Doorstep
Need something new for your reading list? Here are two titles we think are worth checking out. This week, we’ve got Andy Weir’s Project Hail Mary and The Thing on the Doorstep, an H.P. Lovecraft adaptation for Image Comics.
This article originally appeared on Engadget at https://www.engadget.com/entertainment/what-to-read-this-weekend-revisiting-project-hail-mary-and-the-thing-on-the-doorstep-190000250.html?src=rss
Tech
Google adds ‘Advanced Flow’ for safe APK sideloading on Android
Google has announced a new mechanism in Android called Advanced Flow, which will allow sideloading APKs from unverified developers for power users in a more secure manner.
The new system, scheduled to roll out this August, aims to allow installing Android apps from unverified developers while minimizing the risk of malware infections and scams, which caused an estimated $442 billion in losses last year, according to the Global Anti-Scam Alliance (GASA).

Source: Google
Power users who want to install APKs on their devices will have to go through a one-time process involving the following steps:
- Turn on Developer Mode from system settings
- Confirm they are not being coached by threat actors
- Restart the phone and reauthenticate
- Wait one day and then confirm that the modifications are legitimate
Then users can install apps from unverified developers and enable them for a week or indefinitely. Android will display a warning that the app is from an unverified developer.

Source: Google
The process is designed to add friction and disrupt typical scamming tactics that trick people into installing unsafe apps on their devices by playing on the urgency of the operation.
“This flow is a one-time process for power users – it was designed carefully to prevent those in the midst of a scam attempt from being coerced by high-pressure tactics to install malicious software,” explains Google.
“In these scenarios, scammers exploit fear – using threats of financial ruin, legal trouble, or harm to a loved one – to create a sense of extreme urgency.”
“They stay on the phone with victims, coaching them to bypass security warnings and disable security settings before the victim has a chance to think or seek help.”
Google frames the Advanced Flow system as a safe compromise between Android’s openness and user protection, needed for a smooth transition to the new developer verification requirements scheme, first announced last August.
Developer verification is meant as an anti-malware measure, requiring all Android app publishers, regardless of the distribution method they use, to have their identity verified by Google; otherwise, the installation of their software on certified Android devices will be blocked.
Although Google retracted the original timeline for applying the new rule after backlash from the community, it didn’t abandon plans to implement the identity verification system.
This is still coming in August 2026, according to the latest announcement, and app developers are urged to visit this webpage for more information.
Tech
Publisher pulls horror novel ‘Shy Girl’ over AI concerns
Hachette Book Group said it will not be publishing a novel called “Shy Girl” over concerns that artificial intelligence was used to generate the text.
The novel was scheduled to be published in the United States this spring. Hachette said it will also discontinue the book in the United Kingdom, where it’s already available.
Although the publisher claimed the decision came after a thorough review of the text, reviewers on GoodReads and YouTube had been speculating that the book was likely AI-generated. And The New York Times said it asked Hachette about the “Shy Girl” concerns the day before the announcement.
In an email to the NYT, author Mia Ballard denied using AI to write her novel, instead blaming an acquaintance she’d hired to edit the original, self-published version of “Shy Girl.” Ballard said she’s pursuing legal action, and that as a result of the controversy “my mental health is at an all time low and my name is ruined for something I didn’t even personally do.”
Writer Lincoln Michel and other industry observers have noted that U.S. publishers rarely do extensive editing when they acquire titles that have already been published in other forms.
Tech
iPhone 18 Pro could level up its camera game with Halide-inspired features
Apple may be preparing a major upgrade for the iPhone’s camera, and this time, it’s not just about hardware. According to The Information, Apple explored acquiring Lux Optics, the studio behind the popular Halide camera app, as part of its efforts to improve the iPhone 18 Pro’s camera experience.

The talks reportedly took place in 2025 but didn’t result in a deal. Still, the intent is clear: Apple wants its default Camera app to catch up with pro-level tools, especially as its hardware continues to improve.
Why is Apple suddenly focusing on camera software?
Let’s be real, hardware alone isn’t enough anymore. Apple’s upcoming iPhone 18 Pro is expected to push closer to professional-grade camera hardware, but that also raises the bar for software. Right now, many advanced users rely on third-party apps like Halide to unlock manual controls, RAW shooting, and deeper exposure adjustments.

Halide, in particular, is known for offering precise manual control over iPhone camera hardware, something Apple’s default app still lacks. By potentially integrating similar features directly into iOS, Apple could eliminate the need for third-party apps and make pro-level photography more accessible to everyday users.
What does this mean for iPhone users?
Apple hasn’t confirmed anything yet, but the direction is pretty obvious. If Halide’s influence kicks in, the iPhone could get manual focus, exposure controls, advanced RAW capture, long-exposure shots, and pro-level video tools. Basically, turning the Camera app from “tap and pray” to “dial it in like a pro.”

What makes this more interesting is that Halide co-founder Sebastiaan de With is now at Apple, which feels less like a coincidence and more like a soft rollout of ideas. The iPhone camera might soon think a little less like Apple… and a little more like a photographer. For users, this could be a big shift. Instead of jumping to third-party apps for serious shooting, the default Camera app might finally do it all. And if Apple gets the balance right, the iPhone 18 Pro could stop playing catch-up and start setting the pace again.
Tech
Today’s NYT Connections: Sports Edition Hints, Answers for March 22 #545
Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.
For today’s Connections: Sports Edition, the purple category came to me right away, and it’s usually the toughest. I also got a kick out of the green category. If you’re struggling with today’s puzzle but still want to solve it, read on for hints and the answers.
Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by The Times. It doesn’t appear in the NYT Games app, but it does in The Athletic’s own app. Or you can play it for free online.
Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta
Hints for today’s Connections: Sports Edition groups
Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.
Yellow group hint: Same-same.
Green group hint: Otto, Anna.
Blue group hint: He ain’t heavy…
Purple group hint: The DMZ is one.
Answers for today’s Connections: Sports Edition groups
Yellow group: All square.
Green group: Palindromes.
Blue group: NBA brothers, past and present.
Purple group: ____ zone.
Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words
What are today’s Connections: Sports Edition answers?
The completed NYT Connections: Sports Edition puzzle for March 22, 2026.
The yellow words in today’s Connections
The theme is all square. The four answers are deadlocked, even, level and tied.
The green words in today’s Connections
The theme is palindromes. The four answers are kayak, pop, radar and stats.
The blue words in today’s Connections
The theme is NBA brothers, past and present. The four answers are Antetokounmpo, Ball, Curry and Gasol.
The purple words in today’s Connections
The theme is ____ zone. The four answers are 2-3, neutral, red and strike.
Tech
Today’s NYT Mini Crossword Answers for March 22
Looking for the most recent Mini Crossword answer? Click here for today’s Mini Crossword hints, as well as our daily answers and hints for The New York Times Wordle, Strands, Connections and Connections: Sports Edition puzzles.
Need some help with today’s Mini Crossword? It’s not too tough, but 7-Across made me stop and start thinking of five-letter beverage brands. Read on for all the answers. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.
If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.
Read more: Tips and Tricks for Solving The New York Times Mini Crossword
Let’s get to those Mini Crossword clues and answers.
The completed NYT Mini Crossword puzzle for March 22, 2026.
Mini across clues and answers
1A clue: Jost of “Saturday Night Live”
Answer: COLIN
6A clue: German wine valley whose name rhymes with “wine”
Answer: RHINE
7A clue: Big name in root beer
Answer: AANDW
8A clue: Common slot machine symbol
Answer: FRUIT
9A clue: James Talarico’s state
Answer: TEXAS
Mini down clues and answers
1D clue: Cunning skill
Answer: CRAFT
2D clue: Chicago airport
Answer: OHARE
3D clue: Operating system on which Android is partly based
Answer: LINUX
4D clue: World’s most populous country
Answer: INDIA
5D clue: Small salamanders
Answer: NEWTS
Tech
Samsung’s upcoming Galaxy foldables could get a charging speed boost
Samsung’s next generation of foldable phones could bring some changes to charging, though not all of them might be what fans are hoping for. According to recent certification listings spotted via SammyGuru, upcoming devices like the Galaxy Z Fold 8 and a new “Wide Fold” variant have appeared on China’s 3C database, hinting at potential updates to charging capabilities.

These listings typically reveal wired charging specs ahead of launch, making them an early indicator of what to expect. But here’s the catch: the “upgrade” might not be as big as it sounds.
What do the leaks actually reveal?
Two upcoming devices, SM-F9710 and SM-F9760, are believed to be the Chinese variants of the Galaxy Z Fold 8 and a new “Galaxy Z Wide Fold.” These listings show support for 15V at 3A charging, which translates to 45W wired charging. If accurate, that would mark a noticeable jump over previous Fold models, which have typically been limited to 25W wired charging.

However, a separate listing for what’s believed to be the Galaxy Z Flip 8 shows 9V at 2.77A (~25W) charging, essentially unchanged from its predecessor. So while the Fold lineup may finally see a boost, the Flip series appears to be sticking with the same charging speeds for now.
How big of an upgrade is this?
For the Fold lineup, this is actually a meaningful upgrade. Samsung has stuck with 25W charging for years, so moving to 45W would finally bring it closer to its Galaxy S Ultra devices and noticeably cut down charging times. That said, these numbers only apply to wired charging, as 3C listings don’t reveal wireless speeds.

For buyers, this is a welcome but uneven improvement. The Fold 8 and Wide Fold could see a solid boost, while the Flip 8 may remain unchanged, creating a clear divide in the lineup. It’s a step in the right direction, but not quite the full upgrade many were hoping for. Especially when you already have players like OnePlus and other Chinese brands that go well beyond 100W.
Tech
Tesla’s Terafab Brings Manufacturing Power to Match the Scale of Space

Elon Musk made a game-changing announcement hours ago when he revealed plans for Tesla’s Terafab during a live event, taking its work on vehicles and robots literally out of this world. The initiative is a game changer, bringing together SpaceX and xAI to create the world’s largest chip factory. The sheer scale of the operation is mind-boggling, since Terafab will be capable of producing 1 trillion watts of finished chips every year, all under one gigantic roof that will house logic circuits, memory storage, and final packaging.
All of this is important because we desperately need a reliable mechanism to generate solar energy that can be beamed back from space. Terafab is specifically built to accomplish just that. We’re talking about launching an incredible 100 million tons of capture equipment into orbit EVERY YEAR. To accomplish this, we must be able to move millions of tons of material year after year. Once in orbit, solar-powered satellites will conduct all of the AI heavy lifting, with millions of Tesla Optimus robots on hand to erect and maintain those structures well above the good old earth.
Each of those Optimus robots is a significant undertaking, as they require between 100 and 200 billion watts of chips just to function. When you factor in the satellites, you can see the tremendous demand we’re talking about: trillions of watts of chips that no existing chip manufacturer can possibly offer, at least not yet. According to projections, we will have the same shortage until 2030.
That is where Terafab comes in, since it is specifically designed to bridge that gap, with the kind of huge capacity that has the ability to overcome the hurdles that have been holding back both ground-based robot fleets and processing power in orbit. To get it erected, the construction team will use established launch techniques to transport the enormous cargo into place. To get the factory up and running, robots that are already in development will take on assembly tasks that are simply too dangerous for humans to do on a regular basis. As a result, we will have a consistent supply of chips to meet our rising requirements on Earth and beyond.
ELON MUSK: “We’re starting off with an advanced technology fab here in Austin, and I’d like to thank @GregAbbott_TX and the state of Texas for the support.
So in the advanced technology fab, we will have all of the equipment necessary to make a chip of any kind logical memory,… pic.twitter.com/kQ1r5pCgcn
— DogeDesigner (@cb_doge) March 22, 2026
The driving factor behind all of this is a strong desire to explore the universe, not just envision what’s out there, but to experience it firsthand. As one of the speakers put it, “understanding comes only from direct experience out there in the universe,” and Terafab is the first step in translating that idea into something concrete, something that anyone can track, from the start of creation to the end of delivery.
Tech
Reworked Apple Watch avoids ban, but Masimo battle escalates
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The decision, made public on Thursday, concludes that Apple’s latest implementation of pulse-oximetry functionality falls outside the scope of Masimo’s asserted rights. The full ITC commission will now review the judge’s ruling and decide whether to adopt it – a step that will determine whether the redesigned watches remain protected…
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Tech
Daily Deal: The 2026 C# Course Bundle
from the good-deals-on-cool-stuff dept
The 2026 C# Course Bundle offers 8 courses that cover everything C#. You’ll master the fundamentals, explore object-oriented programming, and start building your own apps in no time. It’s on sale for $40.
Note: The Techdirt Deals Store is powered and curated by StackCommerce. A portion of all sales from Techdirt Deals helps support Techdirt. The products featured do not reflect endorsements by our editorial team.
Filed Under: daily deal
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