During its new iPad event this week, Apple introduced a version of its popular Mac OS iPhoto software for iOS devices. The iPhoto for iOS costs $5, and it's optimized for both iPhone and iPad. I tested iPhoto version 1.0 on my iPad 2.\n\tApple has a history of creating elegant hardware and software, and iPhoto for iOS carries on that tradition. For instance, if you want to add an effect to an image, you click on a swatch book and choose between Warm & Cool, Duotone, Black & White, Aura, Vintage, and Artistic. I particularly like the Artistic effect, which transformed a photo I took of an Italian beach into something resembling an impressionistic landscape (see the screen shot comparison of the original and the impressionistic version).\n\tThe main idea behind porting iPhoto to iOS is to add multi-touch to photo correction. Here again, the app succeeds. For example, if you add a softening filter to a photo of someone with crow\u2019s feet, you can get more precise using your finger than you might be able to with a mouse--and the person whose crow\u2019s feet you\u2019re removing will be thrilled, I'm sure. You can do plenty of other things with your finger (or a stylus), such as touching and dragging to improve colors. A single finger tap will straighten a crooked picture and a double tap will identify similar photos. And you can apply adjustments to a specific image area using finger-manipulated brushes.\n\tThe iPhoto app lets you create photo \u201cjournals\u201d that can be shared via Apple\u2019s iCloud, which is another cool feature. You can also upload images to Facebook, Flickr, Twitter, and iTunes; export to the camera roll; add to a slideshow; print (if you have a supported printer); and attach the file to an email. However, I wish you could post an image to Pinterest or upload to a Dropbox account. The app offers a feature for beaming photos from one iOS device to another. But I was unable to get iPhoto on my iPad to beam an image to my iPhone. You can also stream photos and slideshows to an Apple TV via AirPlay.\n\tYou\u2019ll need to update to the new iOS 5.1 software to install iPhoto. And iPhoto is only compatible with iPhone 4 and 4S smartphones and the iPad 2 tablet; it\u2019s not supported at all on the iPod touch.\n\tGiven that iPhoto is currently in its first version, I experienced some instability. Within my first 10 minutes of using the app, it froze. I closed and restarted it, and it crashed. After that, it did settle down. Also, expect to spend a little time learning how to use the app. The icons and UI aren\u2019t always intuitive.\n\tI don\u2019t know if iPhoto is the absolute best image-editing app for iOS devices; there are certainly a lot of worthy competitors. But I can tell you it\u2019s one of the most pleasurable apps of its kind that I\u2019ve used. And given how many options you get to improve and alter your images, it\u2019s $5 well spent.