I work at Plum Amazing which makes photo watermarking software for Mac Win Android and iPhone called iWatermark. More info on the Mac version is heren iWatermark Pro for Mac s niWatermark Pro for Mac does everything you want and more. It is very popular with professional photographers. You can download it free to try it out. UPDATE Weve created 2 new products. They are iWatermark+ for iOSn iWatermark+ Free Watermark 1 or More Photos Video on the App Store s+-free-photos-video and Androidn iWatermark+ Free Add Text Logo Signature Caption - Android Apps on Google Play s The 2 above are FAR better WAY more features and watermark photos and video. If you are trying to choose get the ones above and not the previous versions below. The ones below are still extremely popular though. iWatermark for iPhone and version in the iTunes app store is heren nand the .99 cent version is heren iWatermark for AndroidnFree version in the Android Marketplace is heren nThe .99 cent version is heren iWatermark for iPhone and Android features nu2666 Does graphic and QR codes. Create your own or use the samples (both and graphics). nu2666 With your finger click on the watermark to move it around on the page. nu2666 Choose from 87 fonts included for your watermarks. nu2666 Use pinch to expand the size of the watermark. nu2666 Touch with two fingers at once and rotate to rotate the watermark. nu2666 By touch easily adjust the watermarks scale opacity font color and Multiple selection of Maintains the full resolution of the Share via Facebook Twitter Flickr Email Clipboard etc. Having the ability to watermark your mac win and mobile photos is very handy especially if you are interesting in protecting your ip. I like putting my email on photos. There are too many stories of peoples photos being used without permission. One never knows when you are going to snap a picture that goes viral.