Tom Hanks's typewriter app has topped the iTunes Store chart, according to Digital Spy.

Hanx Writer allows users to write out words on a virtual typewriter, including the sounds and movements of a traditional machine.

It is available in three versions on the iPad, and was launched on August 14.

"In the late 1970s, I bought a typewriter - portable enough for world travel and sturdy enough to survive decades of ten-fingered beatings," Hanks wrote on the app's intro page.

"I've since acquired many more - each different in design, action, and sound. Each one stamps into paper a permanent trail of imagination through keys, hammers, cloth and dye - a softer version of chiselling words into stone.

"I write without caring about typeovers, XXXX'd out words, goofy syntax, & bad spelling because the feel & sound of a typewriter is satisfying in ways that couldn't be matched. Until now!"

He added: "Behold, Hanx Writer - the app that provides the ease and speed of an iPad with the sound and pace of a manual typewriter. With Hanx Writer, you'll hear the rhythm of your work with SHOOK SHOOK or FITT-FITT. You can rely on a DELETE key to correct your typos, or turn that off. Be bold and fearless!"

Hanx Writer also has email, print and share features, and was developed by Hanks with mobile studio Hitcents.