Humble  or inspire yourself with a digital copy of the real Da Vinci Code on your iPad.
Leonardo’s war machines from the 1,000-plus-page Codex Atlanticus are now available for your perusal.  

They say that no one but Apple can make a decent sub-$500 tablet, but Amazon not only thinks they can undercut the iPad in price once… they think they can do it with two tablet at once.

Sounds like Sci-Fi malarkey: an app that measures the amount of calories burned throughout the day just by sitting in your pocket and using the iPhone’s accelerometers to measure motion. But nope, it’s real, and it’s at the App Store for $3.

If Apple Computers had been founded over a hundred years ago, not by Steve Jobs, but by Sir Digby Chicken Caesar, iTunes might very well have looked like this: the theatrophone, an 1890s invention that allowed you to “download” music into your living room, just fifty centimes per song.

To use a sporting metaphor, PC maker HP is ‘trash-talking’ about its chances to beat Apple’s iPad. Viewed in light of declining PC sales, HP is also whistling past the graveyard.

The unexpected explosion that rocked Foxconn’s Chengdu facility on Friday killing three has been blamed upon a build up of combustible dust at the iPad 2 polishing plant. As a two-week old report on factory worker conditions makes clear, though, the dangers of allowing such dust to build-up has been brought to the attention of Foxconn and Apple before.

Kicking off this week’s list of must-have iOS games is one of the most enjoyable music quiz games in the App Store called Tuned. It’s is an innovative new game for the iPhone that offers music lovers an endless number of entertaining quizzes from just about every genre there is.

Storm in a Teacup is an adorable little platform adventure in which you navigate your way through magical lands in a teacup, avoiding the bad guys and solving puzzles in an effort to complete every level.

Bumpy Road is another wonderful platformer that features a unique play mechanic and tells a wonderful love story. Despite its slightly soppy storyline, it’s brilliantly entertaining.

Find out more about the games above and check out the rest of this week’s must-haves – including Draw Jump and Casey’s Contraptions – below!

Are Lady Gaga followers Apple or Android fans? Amazon is using the flamboyant celebrity to push its cloud storage option, selling the singer’s new “Born This Way” album for only 99 cents. Along the way, the Internet retailer hopes you’ll pick it over Apple’s $16 iTunes price … and in doing so, be locked into using their Cloud Locker service instead of Apple’s forthcoming iCloud.

While the impact of deaths and injuries from the Foxconn explosions should not be minimized, analysts Monday discounted the effect on iPad 2 production as minimal and ‘temporary.’ But is a 20-30% decrease in production when Apple is already struggling to fulfill demand really minimal?

This week’s roundup of must-have iOS applications begins with the second edition of PhotoForge – the popular photo manipulation tool for iOS. Completely rebuilt from the ground up, PhotoForge2 promises to be a breakthrough for image editing on the go, with unparalleled tools and amazing effects to transform your photos into masterpieces.

Foodish is a new application that claims to make dining and drinking twice as much fun (is that even possible?), by providing a quick and easy way for you to keep a record of your diet, but in a way that’s fun and enjoyable rather that dull and tedious like traditional diet tracking applications. It makes it simple for you to see how healthy or how dreadfully unhealthy (like mine) your diet is.

Zootool is a great little tool that makes bookmarking, organizing and sharing your favorite images, videos, documents and links from all over the web incredibly effortless.

Find out more about the application above and check out the rest of this week’s must-haves – including Audibly and eBay Motors – below!