Send small files to your phone through camera - as a stream of QR images. Features : • Requires no WiFi, no Bluetooth/NFC, no irDA and no USB cable to transfer files • Both wireless and offline at the same time • Minimal setup - when in download mode, just point the camera on the stream and wait • Generates little radio frequency noise - so can be safely used in the airplane mode on the plane (might be also useful in the military) • Can process requests to send file from other apps in the system (like your favourite file manager app) • Can be used to broadcast file full-screen on TV in the loop - e.x. to allow people walking by to quickly grab some small pdf guide on their phones. Notes : • To receive file from desktop PC - see a web version (Chrome and Firefox - IE11 not supported) : http://wrobel.wroclaw.pl/opticalfiletransfer/webuploaderjs.php Also, windows native uploader at http://wrobel.wroclaw.pl/opticalfiletransfer/en/win/index.php or Linux uploader at http://wrobel.wroclaw.pl/opticalfiletransfer/en/lin/index.php - they are compatible with this app. • Sending larger files is very time consuming - so this app does not intend to replace USB/WiFi/Bluetooth/NFC/IrDA way of file transmission at all. It rathers allows to quickly grab some small pdf/text/image from the PC/phone to phone, when you do not feel like searching for USB cable/setup Bluetooth/WiFi just for that one small file. • It also does not guarantee that transmission will ever succeed on every phone on the default settings. How fast phone can handle capture of the stream depends on the camera/general phone performance/stream brightness/camera ability to focus. • Default settings are likely not optimal for every phone. • If you have problems succeeding to transfer anything on default settings, experiment with the settings - slow down with FPS/allow more errors/etc. • If you want to speed up a little bit, you can also tweak settings a little - towards faster ones - and find what is the limit for your phone/camera. • Transmission settings affects only QR stream producer in upload mode - receiver in download mode only fits to what it sees. • Free version supports files up to 5MB in size.