iWatermark, is the only watermarking tool available for all 4 platforms iPhone/iPad, Mac and Windows. iWatermark is the most popular multiple platform utility in the world to watermark photos for photographers.
This app has just been updated with some really great features. Check out What’s New below. This is a free update, if you have previously downloaded this app. If not, you can download it here. It retails for $1.99/£1.49/download.
— Landscape orientation is supported for iPad
— Memory leaks fixed: one can watermark more than 8 photos at a time
— Help screen scroll fix
— Speed improvements. Much faster