GuitarToolkit is a collection of essential tools for guitar players: an extremely accurate tuner, a precision metronome, a library of over two million chords, scales and arpeggios, standard and alternate tunings, and more. GuitarToolkit now features an all-new iPad version (free for existing users), Retina display graphics, and the GuitarToolkit+ Upgrade, an in-app purchase that adds Chord Sheets, Custom Instruments, and Advanced Metronome with complete drum machine. More »

AmpKit, the ultimate guitar amps, effects and recording app for iPhone, iPad and iPod touch, now features iPad Retina display graphics and an even greater selection of gear in the Gear Store, including the first full-featured, modern bass amp available on iOS. More »

An exciting new release of Lick of the Day is available on the App Store! The new version of the app for learning guitar arrives just in time to celebrate over one million downloads of Guitar World Lick of the Day. There are two new ways to get licks: Lick Packs featuring Hendrix and Beatles packs, and Lick Singles you can select from our catalog of great licks. Every lesson comes with a video, tab and more.More »

The perfect companion to GuitarToolkit, TabToolkit is an incredibly powerful app that let's you read and play tablature files on your iPhone or iPod touch. With built-in tab file upload and download capabilities, instrument synthesis and full tempo controls, TabToolkit is a fantastic tool for learning to play new music. More »

For over 100 years, healthcare professionals have relied on The Merck Manual for essential information on diagnosing and treating medical disorders. The Home Edition and Professional Edition apps provide the trusted information on iPad, iPhone and iPod touch for consumers and healthcare professionals on the go. More »

Ace Flashcards is an incredibly easy-to-use app for studying just about any subject and it’s especially useful for studying vocabulary words. Ace Flashcards has a built-in English dictionary and can automatically look up the definitions of words you enter. Simply enter the words you want to study and Ace Flashcards will automatically create flashcards with words on one side and definitions on the other. You’ll be amazed how easy it is to create and study flashcards for just about any subject with Ace Flashcards! More »

Star6 is a highly-addictive sound remix instrument that allows you to create an infinite variety of amazing sounds from your own samples or by using our free presets. Use the iPhone's accelerometer to control Star6's powerful granular synthesis engine to change the Pitch, Speed, Gate, Sample Order, Sample Size and Randomness of the samples. Record it all with the press of a button and download recordings to your computer in a flash. More »