A free app for Android, by Plum Amazing.

This app is the best way to ensure that you are the owner of the photo or video that is being posted online. By simply adding your watermark to the photo or video, you will be able to prove that it is your property. 

The watermarking process is easy and can be done in a matter of seconds. The app is very user-friendly, which makes it an ideal tool for people who want to watermark their photos and videos. It is also a great tool for people who want to create their own watermarking logos.

iWatermark+ is a free tool that is capable of adding multiple watermarks to a photo. It is also capable of adding a watermark to the video.