Bear can import files in the following formats:

• .txt - Plain Text
• .md - Markdown
• .rtf - Rich Text Format
• .textbundle - V2 Text Bundle (Text, Markdown, and attachments)
• .textpack - V2 Compressed Text Bundle format
• .enex - Evernote XML Export Format
• .bearnote or .bear - Bear Note
• .html - HTML files
• Drafts entries

On macOS you can import your notes by selecting File → Import Notes… from the menu bar.

On iOS you can access to the importers using the … menu in the sidebar.

The importers come with an option to keep the original dates of the imported files; you can also use the first line or the file name as title. However, when importing .bear files, the creation date is always used.