Hi, I'm using the blockstream green wallet on Android. I've written down my seed phrase and keep it safe and secure. Can I now uninstall/delete my green wallet app? to be less vulnerable to theft/hacking.
Yes. If you have written down seed you can always recover your wallet/addresses.
Deleting wallet software WILL grant you more security when you install malware app that scans any trace of bitcoin to hack it will find bitcoin wallet (target) or not. Its minor security, but always something.