The search features of note-taking apps in detail

Here's the detailed search feature comparison as a markdown table:

Search Feature UpNote Evernote Obsidian OneNote ⭐
πŸ” Basic Search
Full-text search across all notes βœ“ βœ“ βœ“ βœ“
Search by title βœ“ βœ“ βœ“ βœ“
Search by tag βœ“ βœ“ βœ“ β–³
Search by notebook / section βœ“ βœ“ βœ“ βœ“
Search within a single note (Ctrl+F) βœ“ βœ“ βœ“ βœ“
Search highlight in results βœ“ βœ“ βœ“ βœ“
⚑ Advanced Search
Boolean operators (AND / OR / NOT) β€” βœ“ βœ“ β–³
Exact phrase search ("quoted") β€” βœ“ βœ“ βœ“
Wildcard / fuzzy search β€” β€” βœ“ β€”
Regular expression (regex) search β€” β€” βœ“ β€”
Date-based search (created / modified) β€” βœ“ β–³ β€”
Search by file type / attachment β€” βœ“ β€” β€”
Saved searches β€” βœ“ πŸ”Œ Plugin β€”
πŸ§‘β€πŸ’» Search Operators
task: / todo: operator β€” β€” βœ“ β€”
line: / block: / section: β€” β€” βœ“ β€”
path: / file: operator β€” β€” βœ“ β€”
tag: operator β€” βœ“ βœ“ β€”
Case-sensitive toggle β€” β€” βœ“ β€”
πŸ“· OCR / Image & PDF Search
Search text inside images β€” βœ“ πŸ”Œ Plugin βœ“
Search scanned PDF content β€” $ Paid πŸ”Œ Plugin βœ“
Handwriting recognition & search β€” βœ“ β€” βœ“
Copy text from image β€” β€” β€” βœ“
Auto background OCR indexing β€” βœ“ β€” βœ“
Multi-language OCR (ζ—₯本θͺžε―ΎεΏœ) β€” βœ“ β€” βœ“
πŸš€ Performance / UX
Search speed βœ“ Fast β–³ βœ“ Fast β–³
Offline search βœ“ β–³ βœ“ βœ“
Cross-notebook search βœ“ βœ“ βœ“ βœ“
Relevance ranking β€” βœ“ πŸ”Œ Omnisearch β€”
AI-powered search / Copilot β€” β€” β€” βœ“
Graph view / link-based discovery β€” β€” βœ“ β€”

Legend:
βœ“ = Yesγ€€β€” = Noγ€€β–³ = Partialγ€€$ Paid = Paid plan onlyγ€€πŸ”Œ Plugin = Plugin required