List value retaining in Share point hosted app 2013

I'm creating a Share point hosted app.
 
I have a list inside Share point 2013 app. We are inserting records into the list through some other forms in app.
But when we deploy the app, it is getting retracted & deployed again. So the list values are getting deleted.
 
Is there any way to retain the Share point app list values during deployment?
 
I tried the following things as suggested by some experts in internet.
 
• Setting up the app catalog for app in Central admin and increment the version for every deployment.
• I set the “deployment conflict resolution” property of list instance to “none”.
 
But both the things not working.
 
Please help me on this issue.