I use the app for several weeks - my database has grown over 300 MB and everything still runs fast and stable! Well done, everyone! The performance is when importing large files (10-20MB) outstanding (on my Samsung Galaxy S2). The ability to nest categories into each other, I have otherwise seen in any anderenen app - but that is exactly what I wanted. And everything can be, despite the amount of data very well structure (therefore remains all too clearly) and quickly find the text search. The app is with me almost daily use. A very good and useful app!