Apl 2018 The app now has full screen view in landscape, making it officially the best outliner in the App Store. There are apps that make fancier outlines, but frankly on the iPad fussing with formatting is just annoying. Plus they use proprietary formats. This app uses OPML, which with Dropbox sync makes it easy to transfer usable data between all platforms. This plus the ability to fold text (hiding points you're not working on) makes it a great way to get serious writing done on the iPad.
Feb 2016 I've had Outliner since iPad 1, and it's still the best OPML app in the store. And still desperately needs (1) full screen landscape mode and (2) ability to select Dropbox folder for sync. Neither of these are hard.
Older:
This is a really good app. It does outlining, just outlining, really well. Which is why it is so frustrating that after 5 years, the developers still haven't released a version adapted to the IPAD. What you get is two iPhone screens sitting next to each other, crowding the space and making it harder to actually write.
Carbonfin, put in full screen landscape mode in the next version. Please!
Old review: Function-wise, this is the best outliner in the store. Although it doesn't have the fancy formatting of omnioutliner, it also doesn't require their proprietary format. And Dropbox sync means I can avoid Carbonfin's sync services, too--that's good.
Problem: as it's been since the beginning, this app in landscape remains two iPhone screens glued together. Full screen mode in landscape would be easier to use with large outlines, better looking, and would prevent me from unwanted touches on the list of outlines. Please, please give us full screen mode in landscape!--as I've been asking for three years now. All other apps do it, so I know you can too!