Do we need to resign the apk for appium automation

Do we need to resign the apk for appium automation.
as i can able to install the apk on emulator and Device as well.
Please help with your thoughts.

Hi All
I am trying to automate my android app using appium.
I can able to launch the app and taking long time to respond using xpath.
I am using appium server version 1.12.1
Appium java client 7.0.0
Please help me what I am doing wrong or missing anything