Phone accessories

The cheap glass protector scratched at level six and was ripped apart by level eight, though it left the screen spotless when removed.

The sapphire protector resisted scratches far better than the cheap one, and came with a full kit, though it costs 100 times more.

Surprisingly good quality for $1, and it survived the drop test with barely a mark.

Well thought out, but you can still play games through it so it is easy to defeat; 2 out of 10.

Cleans a very dirty phone in two wipes and earns 9 out of 10, though it is a bit messy.

A ridiculous accessory with a built-in subwoofer that adds richness to audio and boosts benchmark performance.

Turns the back of the phone into a speaker with hardware music controls, and he was impressed by the bass.

Claims shock protection and buoyancy, but he doubted the iPhone inside was waterproof.

A mirror lets you take selfies with the rear cameras, and a built-in flash makes a clear difference.

Barely a case, but the extending corner mechanism looks cool and still protects the key areas.

Has LEDs inside and plugs into the phone's Lightning port, but the glow is not very bright.

A $5 car windshield repair kit does not fully fix a smashed phone screen, but it makes the damage much better for the price.

He likes how the mount expands out and that it folds back into a Batarang when not in use.

A free cardboard case that fitted better than shop-bought ones and protected the phone in a drop test.

Over the top, but he liked that the light animation follows the direction of charge.

A bulky case that is not streamlined but gives him peace of mind about drops.

Functional upgrade for rear passengers to clip phones to the headrests.

Satisfying physical buttons and a clever joystick for touchscreen games, though there's no practical moment to use them.

Breathable sleeves that feel slightly smoother on a touchscreen but are not worth wearing every time.

Feels like there is nothing there and protects against scuffs, but its back cracked in the drop test, though the phone survived unmarked.

Rated as the third genius LEGO product, as it is made of real LEGO and lets you build on grips, stands and even a steering wheel.

A power bank shaped like a hand grenade, which will cause problems at airport security.

Well-intentioned for self-protection, but it delivers far more pain than a normal stun gun and is banned in places.

A clip-on cooler that lowers surface temperature and adds four trigger buttons, though the grip is strange.