Pinterest, Twitter, Google+, and other social media channels. PhotoMarks: the best watermarking app I just got my PhotoMarks app and love it. There is a lot of work, but if you follow the steps in this post, your work will be visible on your photos. Get the PhotoMarks. The free app is the best watermarking app for iPhone or iPad. Watermark on PhotoMarks, So how do you add watermarks into your photo? After the free trial period, you're done. But you might want to use it at least once to make sure you get it right. In the beginning, this is actually quite hard — and I can't tell you why. But with some practice, you get it. 1. Turn on PhotoMarks Start by turning on PhotoMarks. On both the iPhone and iPad, tap the “Photo” button on the top left of the screen (the green “P” that says “PhotoMarks” in the photo above). Then select “Edit” from the popup menu. Under “Watermarking” tap “Watermark” or “Watermarked”. If it's your first time using PhotoMarks, it will automatically search for all the available watermarks on your photos. In my tests, that was over 200. 2. Add a watermark If possible (and in most cases) take some time before you turn “Watermark” on, as it saves the watermarks. To add a watermark, tap in the bottom left of the screen and select “Watermark” or “Watermarked.” PhotoMarks watermarks can be customized in this dialog window (located under “Watermarking”) 3. Preview and adjust It's best to preview a watermark before you adjust it. First, click on the watermarked image on the right side of the screen — the one that is the subject being watermarked. The preview appears in a little window on the right side of the screen. You should have a preview like this: PhotoMarks preview and adjustments 4. Add Watermark with Image > Add watermark. This opens up a dialog window where you can decide the size and style of your watermark. Then click the Add to Edit button at the bottom of the preview (on the right side of the screen). PhotoMarks adds its watermark to the top right corner of your image.