Android phones and iPhones have built in software options for signing documents. When receiving a digital document such as a PDF or Word file that needs your signature, you can easily take care of that using your phone. Whether you use an iPhone or an Android phone, both include built in options for adding a quick signature onto a document, saving a new copy and sending it off to whomever you need. While these tools work in a pinch, I wouldn't recommend them if you're marking up a
