Description:
A native note-taking app from Proton would add an important everyday tool to the portfolio while extending Proton's high privacy standards to note management. The app should offer the following core features:

Extensive functionality – text notes, checklists, image and file attachments, formatting (bold, italics, bullet points) – in other words, the same level of performance as Google Notes.

Intuitive user interface – quick creation, editing, and organization of notes via swipe gestures, drag-and-drop, and context-sensitive menus.
Integration of “share” services – Users should be able to transfer content from other apps (e.g., Spotify, YouTube, podcasts) directly into a note using the “share” function.
Example: While listening to an audiobook, the current song/track can be saved in Proton Notes using Spotify's share option. The note automatically displays the album cover as a thumbnail so that you can quickly find the right place later.
End-to-end encryption – All notes are encrypted locally and backed up in Proton Cloud (Drive) so that only the users themselves have access.

Cross-platform synchronization – Available on iOS, Android, and in the web client, so notes are accessible everywhere.

Benefits:

Privacy: No sharing of personal notes with third parties.
Productivity: Seamless integration of media and contextual information (e.g., album covers, podcast titles) directly into the note.
Consistency: Complements the existing Proton ecosystem (Mail, Calendar, Drive, VPN, Pass, etc.) and strengthens brand loyalty.

Such a Proton Notes app would offer users who already trust Proton services a secure and functional alternative to Google Notes.