Updating sqlite data in Android

I am working on an Android app which basically shows locations on map. I plan to store location related data locally in sqlite. But I also need to update app data periodically as either I would be collecting more data manually by myself or would enable app users to send me the new data by email which I can then update in my app data.Bottom-line is that at intervals I need to update my application data so that users can have as many locations as possible.

I want to know how can I periodically update app data?Do I need to periodically run scripts in my application which pick up new data and dump it in sqlite? Or, storing data in sqlite is a wrong approach and storing data on server side is better?