As soon as you try one with more than a few letters, it ceases to work. But the worse is, you took over €20 which is much more than other apps, but when I ubinstalled it, you do not refund! A real 'Chilul Hashem'!
No complaints ... I would however like to be able to search longer acronyms. *Note*
The Notarikon 4.9.8 update improves the security, stability and compatibility of the app, and is recommended for all users.