My 2c (10,000 users app):
- Respect the user and not send any annoying requests for suggestions -> Getting feedback should be a very minor point of your app, assume the user does NOT want to see any requests for information
-Think like the user, use the app extensively and try and make it as perfect without their feedback
- Offer a discrete email for them to contact you (usually within the help page)
- Add the option for reviews & feedback (via the Apple API)
I get quite a bit of comments via reviews and also the occasional email
Because users have to actively reach out to you, usually the quality of the feedback is very high
Currently rated 4.8/5 on the App Store, so it’s working for me. That said its not a complex app, so I haven’t had as much need for user feedback