I bought the version of watermark, it worked quite well until probably the previous version of IOS. But now with iOS 8.3 I cant see all my pictures. It seems that there is a new version of Iwatermark, the + version. I tried it and it works perfectly. So if I want to solve my problem I have to buy one more time the new version.... Not acceptable.
N1kko about iWatermark - Watermark Photos, v6.0.2