Update: Couldnt backup/restore my groups when I transferred to a new device. Wrote to support and still havent gotten an answer in weeks. Previous Review: I use this on my iPad to set my contacts up into groups. I also like that I can press a button and filter to see all my contacts upcoming birthdays, all contacts whose addresses are near me on the map, all contacts that I havent put email addresses or contact photos in for, and other data that would be hard to find in a normal address book. Over time I have accumulated 1800+ contacts and today I though about backing them up in case of an accident. I found the export function in Settings and the app generated a file that I could email to myself. I had a bit of a problem though because my file was so big. It finally emailed over wifi though. My only concern is that the file was .vcf (which isnt really a concern except that if I ever *do* have to restore from this file, Ill lose all my contact photos and custom group icons I created). Id like a way to backup the file and just transfer it over iTunes though since Im sure the bigger it gets, the more problems Im going to have transferring it through email. Other than that, I think its a great app!