Soonr\u2019s new iOS app for Apple\u2019s iPhone, iPod touch, and iPad, Scribble ($4), is designed to help busy people on the go refrain from becoming something their colleagues loathe: a productivity bottleneck.\n\tWhile most iOS annotation apps only let you markup PDF files, Scribble lets you annotate 35 different document types. So, for example, if a colleague sends you a diagram, PowerPoint deck, Word doc, Excel spreadsheet, or other file, you can draw big red Xs on them. You probably won\u2019t win friends, but you\u2019ll get your point across.\n\tYou can scribble notes and add question marks to the document, too. Most importantly, you\u2019ll keep the important approval process flowing without needing a laptop or the native apps used to create the documents.\n\tHere\u2019s what you will need: A free (or paid) Soonr account and the free Soonr desktop application for Windows and Mac.\n\tThe desktop app creates a folder on your computer, into which you upload documents. Once uploaded, files are automatically synced to other computers on which you\u2019ve installed the Soonr app as well as to your iPhone or iPad. You can also enable colleagues, clients, and others to view and\/or markup the documents in your Soonr folder.\n\tOnce a document is annotated, it\u2019s automatically saved as a new PDF file; the original file isn\u2019t altered. This is to keep you from inadvertently creating the dreaded \u2018version confusion\u2019 among multiple reviewers, which pretty much assures you\u2019ll become a productivity bottleneck.\n\tYou can annotate documents in Scribble when you\u2019re offline, a nice feature for frequent flyers. As for security, you access and upload documents over 256-bit SSL connections, according to Soonr. Files are mirrored and backed up to data centers that \u201care physically monitored\u201d 24-7, the company says.\n\tThough what the Soonr service does behind the scenes is complex, the Scribble app is blissfully simple (I tested version 3.5.15). However, at the moment it\u2019s a bit too simple. The app doesn\u2019t enable you to add typed annotations or highlight a document, though a company spokesperson says those features are coming \u201cin about two weeks.\u201d Also, you\u2019ll need a stylus to use Scribble, because there\u2019s only so much annotating a finger can do. I use and recommend Adonit\u2019s Jot Pro ($30).\n\tSoonr has already introduced Scribble for the Android-based Samsung Galaxy Note, which comes with a 5.3-inch screen and the S Pen stylus. (AT&T begins selling the smartphone\/tablet hybrid Feb. 19.) Scribble currently only works on the Samsung Galaxy Note but will support other pen-enabled Android devices in the future, according to Soonr.