Let's play with Fire! Literally hottest app on the App Store.

Incredible realistic burning screen simulation including "augmented reality" camera mode. Interactive via multitouch gestures, accelerometers and gyroscopic sensors and video stream content. Variable backgrounds, adjustable settings and stylish burning clock.

► Burn the world! Camera "augmented reality" mode
► Play with flames by your hands
► Fluent realtime simulation
► Wind simulation when device is moving
► Awesome set of background pictures (HD!)
► Add custom backgrounds from photo library.
► New stylish user interface.
► Adaptive sound simulation!
► Burning clock of flames
► Adjustable speed, sparkles and other settings.
► On a cold day let our iFire++ to keep you worm!
► No banners, annoying reminders etc.

Complex and extremely optimized mathematics solving Navier-Stokes equations in realtime to simulate gas dynamics of burning fire, accompanied with sound effects simulation. 98% of this software (by execution time) was hand-written on perfectly optimized ARM NEON Assembler, utilizing all power of A4 and A5 processors and giving more than 10x times performance boost comparing with C++ code.
Hard to believe but true - all that stuff is just for fun!

Enjoy!