W4Form is a free IOS application that works on the IPad as well as the IPhone. You can use this application to quickly fill in W4 PDF form. Sign then print or email the filled out and digitally signed form to anyone.
What's new in version 2.0.0
ReleaseApril 24, 2014
Date AddedMarch 31, 2014
Additional RequirementsCompatible with iPhone 3Gs, iPhone 4. iTunes account required.