Should you use databases to store multiple numbers?

Question

Android

Is it worth connecting databases to store a simple pair: subject - value, if there are no more than 50 such pairs?
Is it worth it in this case to store everything just in a text file? And if you change the value every two seconds, then which is faster and more reliable: databases or working with your own file?

Answer 1

Why save them every time? enough on activity.onPause or onStop,
optimally store in SharedPreferences and cache in memory