The last version (0.30) it keeps telling me that the beta has expired and that I should download a new one*. I contacted the developers twice, without any kind of response or acknowledgment.
I hope they are not just abandoning this app, it is really the only reason old iPad are still useful…
*On OS X 10.7.5. Btw, if you change the system date it still works, but then all the notifications of the last few months starts to appear one after another. It is the proverbial pain in the neck