Roundup: Best of TechRadar: this week's best features and hottest reviews

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How to make an iPhone completely invisible

The race to create the first cloaking device is on

Imagine a smartphone that remains "cloaked" until its owner whispers a pass phrase. It's an incredible concept, but could it be that the ultimate smartphone security feature is invisibility? If you think that sounds crazy, how about rendering an entire car or a space ship invisible? Even crazier, it's rapidly becoming science fact rather than science fiction. And that's because it's not only been shown to be possible within the laws of physics, but it's being worked on by scientists and researchers right now.

Read: The real science behind tomorrow's invisibility tech

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How on Earth can you make a smartphone for £26?

Simple answer: don't expect it to be brilliant

Recently launched in India by low-cost manufacturer Karbonn, the Smart A50S looks like a modest smartphone that's unlikely to tear you aways from the Apples and Samsungs of the world. But it has one fantastic USP: it's on sale for just Rs. 2699 (around £26). Its availability online in the UK has quickly led to outrage at the fact we're forced to spend over £500 for a handset from Apple, Samsung, Sony or HTC – so are we being overcharged? Read all about it

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Facebook forcing us to download Messenger is a brilliant move

But predictably, the internet is mad anyway

As you may have heard, Facebook is making a significant change to the way messaging works on its mobile app. Specifically the company is removing the messaging functions from the primary Facebook Mobile app and has begun shunting its users into the separate Facebook Messenger app for chat. And contrary to popular opinion online, Scott Alexander things it's a good thing.

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iTunes 12 in OS X Yosemite

Why Apple needs to think different

It's sometimes hard to recall just how revolutionary iTunes was on its debut in 2001. It arrived during a genuine revolution in music, as the industry lurched from the comfort of CDs to the unknown territory of digital. But by iTunes 10, the app had mushroomed into a messy, complex beast. Here's why Apple needs to change course with iTunes in Yosemite

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Why your iPhone won't be replacing your doctor just yet

Your smartphone won't see you now

Tracking health and fitness on your smartphone is big business these days with numerous companies developing trackers and apps to help you stay on top. This may sound great, but it's not ready to take our hospitals by storm just yet, as Dr Dushan Gunasekera - founder of the myHealthCare clinic in London - explains. Why your iPhone won't be replacing your doctor just yet

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4K TV broadcasts are on the way but there are problems ahead

Live 4K trials reveal weird time troubles, but look amazing

As the final whistle was blown in Rio, the BBC's engineering team collectively breathed a sigh of relief. Its ambitious trial to deliver 4K live, simultaneously via DTT over the air and the Internet, appeared to have been a resounding success. I was invited along to watch the epochal kickabout at BT Tower, which offered an unprecedented opportunity to compare both feeds on nearly every major brand 4K UHD TV available. The event, organised by the Corporation, BT and Arqiva, was hailed as "a unique moment" in broadcasting history. But it also highlighted some unusual problems and anomalies. Read may on 4K

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How HTML 5 is speeding up apps for iOS and Android

INTERVIEW The perfect test bed for apps?

When HTML 5 first arrived on the scene it promised big things for the web and mobile - one app compatible across all platforms without the need for developers to tinker with code sounded great. Thing is, it hasn't worked out that way just yet. Developers are still stuck with the intricacies of iOS, Android and Windows Phone which demand some level of native programming for each platform. Read all about it

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10 ways The Last of Us Remastered is better on PS4 vs PS3

How PS4 makes this Naughty Dog-developed blockbuster even better

Next-generation consoles aren't backward compatible, so gamers have had to keep their older systems plugged in order to play games like The Last of Us and Grand Theft Auto 5. The Last of Us Remastered for PS4 released this week to help alleviate this messy dilemma within our media cabinets. There's one less reason to cling onto that old PS3 hardware. Developer Naughty Dog didn't just port the original game to the new system. It enhanced the critically acclaimed post-apocalyptic adventure of characters Joel and Ellie. This has inspired a new debate among early adopters of Sony's new gaming platform: Is The Last of Us Remastered for PS4 worth the upgrade?

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10 things Google should fix on the Chromebook

Chromebooks might be fast, but Google seems slow to fix their problems

There's a lot to like about Chromebooks: they're lightweight, start in seconds, have amazing battery life and of course are dirt cheap. But the platform has problems, too. There's a shortage of quality apps, limited video and audio playback support, various PDF issues, no direct access to network shares, outdated documentation and more. 10 things Google should fix on the Chromebook

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Will video kill the photography star?

Shooting 3,000 frames a minute you'll never miss a moment

I've been told on more than a few occasions in the last week or so that video is the way forward for all photographers. More specifically, that once we all have the ability to record 4K video with our DSLRs we'll have no need or desire to shoot stills. The smart guys will be pulling 8-millon-pixel still images from their video footage and never relying on chance and never missing a moment.