Theoria
Reading, highlights and notes
Read your own books and PDFs on any device, and keep your highlights and notes with them.
What it does
Your books
EPUB, PDF, text and Markdown, kept on your device, with shelves and search.
Highlights and notes
Mark passages, write notes, and export them as Markdown.
From a Kindle
Bring in your Kindle highlights or a Readwise export.
A library folder
Keep books in OneDrive, Google Drive or Dropbox, and they come onto your shelf.
A closer look
On any device
Theoria is a web app: open it in your browser and add it to your Home Screen, on iPhone, Android or a computer. No app store, no download. How to add it
Privacy
On your phone
Everything works without an account and without a connection. Nothing is sent anywhere unless you turn on sync.
Encrypted if you sync
With sync on, your data is encrypted on your phone with a key only you hold. The server can’t read it.
No scores
No streaks, badges or rankings.
Proairetos
Askesis
Soma
Oikonomia
Hydros
Praxis
Diaita
Philia
Ergon
Therapeia
Dynamis
Ktema
Phyton