We, the StackCommerce deals team, tested an app that can allegedly do it all—scan, sign, and even fax documents right from your iPhone, Android, or iPad. During Popular Science’s version of Prime Day, you can get a lifetime subscription for just $41.99 with code TAKE30 at checkout (reg. Being able to annotate, sign, and even redact documents right on our phones saved us so much time. We even tried the fax feature, and it worked flawlessly for times when we needed an old-school sharing method. You have until July 20 at 11:59 p.m. PT to get a SwiftScan lifetime subscription for $41.99 with code TAKE30 at checkout (reg.