Last we covered Kicksend in NovemberKicksend, the Y Combinator-incubated web file-sharing tool for the non-technical crowd, had just raised $1.8 million in funding from True Ventures, with participation from Digital Garage, SV Angel, Start Fund, and Milo Founder and CEO Jack Abraham. The team was heads-down fixing, tweaking, and developing some new features for their file-sharing service.

But, today, the startup is going mobile with a new iPhone app to let users take all of their photos videos they have stored on their phone and instantly send them to any friend, list of colleagues, or email address, instantly — across platforms.

For those unfamiliar with the service, Kicksend has launched web and desktop apps that connects users in realtime, enabling them to drag and drop big batches of files from their desktop and have them delivered instantly to their desktop and web apps. And now this functionality has arrived on mobile.

Kicksend’s advantage over other file sharing media is that it has no size limits, is private, and works asynchronously — unlike IM. With Kicksend, there is no need for share folders and permissions, and now with its mobile app, the startup is live on all the major platforms.

Like its desktop and web apps, Kicksend allows users to send large batches of high-res photos and videos from their phones to any friend, instantly, regardless of whether or not they’ve downloaded the Kicksend app.

Basically, Kicksend has enabled simple file-sharing on the iPhone, so if users send documents from other apps, or, say, you’re using GoodReader and you view a PDF, users can choose «Open in Kicksend», you can share that with any other user in realtime — something that will be awesome for all those holiday photos.

Thus, documents, photos, and videos will appear instantly on the recipient’s desktops and mobile devices in realtime, or, in turn, users can view, send, and comment privately on PDFs, documents, photos, videos and more. If recipients don’t have the Kicksend app, they can receive files via email with links to download within minutes.

There are a ton of file-sharing services out there, but Kicksend has a great user interface, is extremely simple to use, and pretty much allows users to send any size file easily, instantly, to any device, across any platform, offering notifications and statistics to boot, so that users can see how many people in a group have downloaded the file. It’s a great tool. For more, check out the app here.