Bebop⁽¹⁾ is my preferred method. I can open it directly and capture an idea or note with one tap, or use its share sheet to capture links.
It can be configured to append to an Obsidian “Daily Note” in an iCloud vault, which works great.
No third-party services FTW.
⁽¹⁾ https://apps.apple.com/us/app/bebop-quick-notes/id6477824795