Luckily, the app is free now, so you can try it out for yourself. Update:Sente came out with a new version Sente 6 for iPad. The pricing information above already reflects this update, but the vides in this post show the previous version. Sente is absolutely worth its price! Why? Beyond seamlessly integrating with your Mac over the cloud, Sente for iPad also offers you a feature-rich annotation workflow that is unmatched in its functionality. However, don’t worry about paying a little extra for the non-free version (if your library has more than 100 papers) and even a yearly top-up (if all your papers take up more than 1Gb of disk space). Sente says that a premium account with 1GB storage will be good for about a total of 1000 typical journal articles (across all your libraries!), and this is pretty accurate. Its getting more complicated when your library attachments need more than 1GB storage on Sente’s servers, at which point you would have to look into storage top-ups that start at $20 a year, but bottom line is this: Sente is free for beginners, and very affordable for most people. If you want to have more papers in a library, an academic premium account asks for a one-time fee of $30. Sente for iPad is free for small libraries of 100 papers or less. This second-last post in the mini-series on PDF management systems gives you an insider’s look into Sente’s companion app for the iPad.