Ulysses
As per the description on the App Store, this is an app that has been described to be a writing app that is world class. The desktop version of this app has been one of the staple apps that have been used by many users. While first it rooted from the Mac to the iPad, the latest update of this app has let it now touch iPhones. This app has various kinds of features in its iPad Pro version like the Slide Over or Split View option.
Tweetbot 4
Another app that you can think about is the Tweetbot 4; this is an app that can be used if you want to gain a better experience while using Twitter on your iPad Pro. It is flexible to use and the screen size space that is used is optimised. There are also various other panels that are available to make things easy for you.
2Do
It is not easy for a person to stay organized throughout the day. The 2Do app is an app that you can use if you want to keep a track on your goals, ideas or projects as well as scheduled things properly. This is also perfect if you want to review process and capture any kind of information. It also provides a flexibility which allows you to make changes as and when you want. This app is also compatible with the iPhone.
GarageBand
For music lovers, the GarageBand app is something that you can consider even though it does not provide additional support like the Split View or Side over, however this is an app that is considered to be a compelling app. This can be used not only by professionals but also by beginners.
Ferrite Recording Studio
Ferrite is an app that is marketed as a recording studio app in general. There are many features that are present in the app which include tools which are podcast centric. This app allows you to not only edit, but also mix and record a complete podcast.