I've entered my nsec into half a dozen Android clients. On the web, I use nos2x or Alby. I still haven't used nsecbunker, but plan on doing so. I have it running and play around with it a bit. Again, I'm not saying it's not important, and I look forward to the Amber signing app for Android one day.
This nsec private key thing is the best thing here haha 😄