A word on the encryption
As a student of cryptography one should note a couple of things about the method of encryption, RC4. If you are going to transmit a lot of information using this method, it is not very safe. RC4 was cracked using 40 frames of data very quickly using a CPU as powerful as your average desktop or laptop (see Breaking 104 bit WEP in less than 60 seconds by Tews, Weinmann and Pyshkin). If you are going to encrypt a large amount of data using DES (which uses a 56bit key) is safer. Second, as with any encryption method, your data is only as safe as your password. Even the most secure methods are easily breakable if you use a word that is in the dictionary or a proper name. If you are seriously concerned about data protection, visiting the Wikipedia page on RC4 may be helpful. That said, the app is easy to use and a good implementation of the encryption algorithm.
That Guy_ about TXTcrypt