Looking for Rec: Offline note taking app?

Features I Need :

• Totally offline
• Quick note taking, I can just tap "New" and immediately write my note
• Can save without title
• Auto save the note after pressing 'back'
• Tags or notebook/folder for categorization
• Can export to other format like txt or pdf.

Features I want (but don't need) :

• PIN or biometric for opening the app
• Support markdown
• Automatically set creation date as title

Features I don't need nor want :

• Online sync/backup
• Attaching media (images/sound/etc.)
• Any other online services (AI/assistant/integration with calendar/spellcheck/etc.)