Welcome to the weekly iPhone Quality Index (Qi) games round-up, giving you the LOWdown on the HIGH scorers every Friday on these illustrious pages.

As you may already know, Qi trawls the web for iPhone game reviews from the world's most respected online and print sources.

Qi then applies its own magic formula to each site (such as 148Apps, Macworld, and Alle meine Apps) to establish a single definitive Qi score for each iPhone app and game.

Smile, an ever-lasting smile

Conjuring up painful memories of mid-'90s boy band ballads and then, thankfully, extinguishing them in seconds comes Wooords, a freeform word game with a dazzling 9.1 Qi rating and more than a whiff of UK quiz show Countdown about it.

Test your vocabulary, speed, and ingenuity across three separate game modes by rearranging the nine magnetic letters of the alphabet on Stray Robot Games's virtual fridge into as many legitimate English terms as possible.

Each of the randomly generated selections contains a 'key' letter with which to gain additional points, an element that contributed to No DPad's 10/10 review: "It's accessible, enjoyable, and best of all, it makes you think. I love games like this, and Wooords executes almost everything to perfection."

Striking a cord

There's nothing particularly unique or irregular about a video game franchise crossing the smartphone platform divide – tens of modern-day developers port their wares between ecosystems on a weekly basis.

What is slightly unusual about the fifth-placed title on Qi's leaderboard this week Cordy, though, is that this fabulously accomplished 3D platformer has run, jumped, bounced, and swung FROM Android TO iPhone.

Rather atypically, you can download SilverTree Media's console-quality experience for free, and guide the "little robot with a big job" through four levels before committing your moolah to the rest.

Shop 'til you drop

Not for the first - or indeed second - time, business-management specialist Kairosoft enjoys unqualified success on the Quality Index's dynamic charts.

On this particular occasion, it's the Japanese publisher's five-star retail venture Mega Mall Story that's pulling in the iPhone window shoppers and attracting positive feedback on AppSpy's comments forum:

"It's got loads of content, and an easy to use interface…once you open your mall's doors, you might not put your iPhone down until the fifteen years (given to complete the game) have passed."

You can get the up-to-date information about which games are reviewing best over at the Quality Index.