What is the best? Managing personal data is so "personal", the slightest annoyance could make all the difference. For me, the best is a feature-rich, well-main

What is the best? Managing personal data is so "personal", the slightest annoyance could make all the difference. For me, the best is a feature-rich, well-maintained, and well-designed app. Today I saw Zotero for Android on HN. I always recommend Zotero. If OSS/local is not an issue, raindrop.io is my best (following my criteria).