New ask Hacker News story: Ask HN: How to collect usage data without violate user privacy?

Ask HN: How to collect usage data without violate user privacy?
2 by wonderfuly | 1 comments on Hacker News.
When building side projects, usage data would be useful for product iteration, like which part of your product has most usage, what countries are your users from, etc. But users are also very concerned about their privacy. So how can we collect usage data without violate user privacy? What data is ok to collect? what is not? and how?