iDrumTune is a patent pending application for iPhone that helps you tuning your drums by displaying the frequency of the drum.

The app analyses the sound of a drum and provides a measurement of the drumhead vibration frequency, much in the same way to an acoustic guitar tuner which measures the vibration frequency of a guitar string.

In pitch tuning mode, simply hold the iPhone over the centre of a drum, about 4-6 inches away, and strike the drum in the centre. The iDrumTune display shows the recorded sound waveform and gives the fundamental frequency of the drum.

There is also a tuning indicator bar which shows the drumhead tuning relative to musical notes, so iDrumTune can be used to ensure that your drums are in key with each other or the song you are playing.

A frequency spectrum view also allows more detailed analysis and tuning of higher overtones, which can be excited when hitting the drum around the perimeter.

When tuning a 12' tom for Rock music, you may want a low sound at around 100-110 Hz, whereas a Jazz tuning might be up around 140-160 Hz. You'll soon start to identify your preferred tuning frequencies for your drum kit. Watch this demonstration video:

Last but not least, iDrumTune includes a a 10 page comprehensive manual on the science of drums and drum tuning.

Alex Reeves, who worked with Dizzee Rascal, Nick Cave and Paul McCartney among others, says:

"This is great. Smartphones have made this idea entirely workable in the studio - I'll be tuning all my drums to the key of the song in a matter of moments. Well done iDrumTune!"

You can download iDrumTune in the iPhone App Store. For a limited time iDrumTune is available for $1 instead of $2. Compatible with iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation), iPod touch (4th generation) and iPad. Requires iOS 5.0 or later.