A new version of Universalis for iPhone/iPad/iPod Touch has just been approved by Apple and is in the App Store. If you already have the Universalis app then you should find that the App Store offers you an update automatically in the next day or so.
The layout has been modernised and simplified, and you can now read the Hours page by page, like a book, instead of having to scroll through them. You can find full operating instructions at http://universalis.com/iphone - they are simple, and short enough to read even on the iPhone itself.
There are a few new features planned for the other Universalis downloads, but it will be a month or so before they are ready. When they arrive they will, as always, be a free upgrade.