sqlite - Storage type for few data? -

i'm developing sms application , want message , phone number inserted user stored in memory in order automatically retrieved next time user opens application. storage type should use? think sqlite database unnecessary such few data... xml files read-only. should use cache memory? thanks!

cache memory? next time reboot pc gone. databases best options. if not simple text file suffice guess. simple file i/o needed every time user opens app. note in case need encryption/decryption if storing passwords.

for xml files need define xpaths, parsing logic etc. better write in plain text file delimiter space or comma or *.