This thread is a little old, but in case this helps anyone reading it I can strongly recommend the inexpensive Smart Photo Album by NexTiga as an excellent app if you have a very large number of photos to organise on your iPad or iPhone. There are several apps with that name or something similar, so be careful to check the developer's name (NexTiga). Most importantly, this app does NOT duplicate photos in the Camera Roll, so takes up very little space on your iPad or iPhone - and it's universal. Allows the creation of an unlimited number of albums and keywords. Albums created in Smart Photo Album (SPA) can be exported to the iOS Photos app and vice-versa. SPA allows photos to be selected by keyword(s) or album and deleted individually or as a batch with the deletions taking place in the Camera Roll and in any Photos app albums. If you have thousands of photos, it is much easier to find them in SPA than in the Camera Roll. SPA automatically and very quickly checks and updates its indexes each time it is opened to reflect any changes in the Camera Roll since last run. It also has an excellent and comprehensive help facility. I also recommend PhotoSync for transferring photos via wifi between iPhone, iPad and PCs.