My Camera Roll runneth over. With more than 1,000 photos on my iPhone, it's difficult to navigate to a specific photo without a lot of guesswork and scrolling. That's because the Camera Roll uses little to none of my photos' metadata -- photos are organized by date taken and that's that.
With Photowerks, you can slice and dice your Camera Roll in a number of useful ways. In addition to date taken, you can group your photos by location (city, state, or country) and by the camera (make or model) with which you snapped the shot. You can also change the order (ascending or descending). The app is free, but for a 99-cent in-app purchase, you can enable Photowerks' Smart Albums, which let you combine date, location, and camera attributes so you can create an album of the shots you took with your Canon in New Orleans during Mardi Gras.
Photowerks is simple in operation, but for that simplicity, you get very few features. You can't use the app to delete photos from your Camera Roll, for example. I had hoped to use it to group photos that I could then easily delete to recapture some space on my iPhone. Unfortunately, you can only delete one photo at a time, and even then it removes the photo only from the app and not your phone entirely. Also, you can use the app to view photos in your Camera Roll or Photo Library, but not your Photo Stream. Lastly, the app lets you share photos but your option are limited to e-mail, Facebook, and Twitter.
For better browsing of the photos on your iPhone or iPad, however, Photowerks is an improvement on your iPhone's native Photos app.