How can I update my current Apps without lose current existing record?

Question

I have created a sample apps and install it on my site, and I have entered some data to my apps (lists record) and then I have updated some code on my Apps, and I don't know how can reinstall it to my site, without lose any data?

Answer 1

You need to follow an upgrade process to update the apps.

For an update, you use the same product ID in the app manifest that you used for the original version. The version number in the app manifest should be greater than the version number of the original app or the most recent update.

Following article at msdn describes it in detail:

App for SharePoint update process