Everything I've tested.

His number-one pick: clear solar glass that could turn every window into a power source.

A cheap off-grid home with its own wind and solar power and water collection, controlled by one app; rated seven out of ten.

Tree-shaped wind turbines that double as tourist attractions and generate power silently.

Very powerful, well-designed flagship with a great screen and fun camera modes, held back by unpolished software and ordinary low-light pho…

A crowd-sourced eye-tracking phone with poor specs, which shows consumers don't always know what they want.

Cheap, efficient three-wheeler that took 65,000 pre-orders without delivering one car, rated 6 out of 10.

A crowdfunded colour-scanning pen that looks faked and still has no retail product after ten years.

Misjudged how people read newspapers, earning a mild 2 out of 10 on his fail scale.

Temple-less sunglasses held on by magnets glued to the face, rated 3 out of 10 as a fail.

Clever technology that nobody found fun to use, given 4 out of 10.

A sports-focused phone with a huge monthly fee that almost nobody signed up for, rated 5 out of 10.

A sofa inflated with a hair dryer that melted, leaked and slid around, scoring 4 out of 10.

Engaging local anonymous app that became toxic through bullying and hate speech.

A phone that doubles as a vape appeals to hardly anyone, scoring 5 out of 10.

A crowdfunded laser razor whose prototype could burn only one hair at a time, rated 6 out of 10.

A tense, hugely popular live quiz game that collapsed once it couldn't fund its prizes.

Microsoft bloated Skype with unwanted features and let Zoom overtake it, earning 7 out of 10.

Microsoft's Twitch rival failed because viewers wouldn't switch platforms, even after paying huge sums for Ninja and Shroud.

A $200 device that only ran Twitter, and badly, scoring 7 out of 10 for sheer stupidity.

An unofficial scam coin that crashed to nearly zero, rated 9 out of 10.

A $15 billion pyramid scheme posing as a cryptocurrency, his worst fail at 10 out of 10.

Like three monitors in one, with a curve that is actually useful for wrapping around you.

Extremely rare and hard to source, but he calls it the nicest keyboard he has ever used.

The largest edible gaming PC in the world turned out to be an impressive and delicious cake.