Keep the structure
Chapters stay in order. Equations, figures and tables remain attached to their surrounding explanation.
A smarter way through serious reading
Read the hard thing. Actually understand it.
Turn the textbook or research paper you already need into a guided learning experience. Listen in a natural voice, keep equations and diagrams in context, ask questions in the moment, and leave with ideas you can recall.
- Keep equations, diagrams and explanations together
- Ask, translate and make review cards as you read
- Start with EPUB, text-based PDF or plain text
A free account includes five books and 1 hour of standard narration. Paid plans include a 7-day trial of the plan you choose; cancel before it ends to avoid the subscription charge. Scanned PDFs without selectable text are not supported yet. See what works and what it costs.
From dense page to lasting understanding
One idea · explained, heard, remembered
Same passage · English → Spanish
English
Attention compares each query with the keys. The resulting weights decide how much each value contributes to the output.
Spanish
La atención compara cada consulta con todas las claves. Los pesos resultantes determinan cuánto aporta cada valor a la salida.
The printed equation
Attention(Q, K, V) = softmax(QKᵀ / √dₖ)V
ElevenLabs voice · George
A short George narration, produced with ElevenLabs.
For the reading that takes more than one pass
TextbooksResearch papersFinanceEngineeringIndependent study
Follow every sentence
Listen at your pace while the current passage is highlighted. Tap another line to pick up there.
Read across languages
Translate a chapter when you need it, then switch back to the original text at any time.
Work through hard ideas
Ask for an explanation, a rephrasing or a worked example right where the question comes up.
A considered investment in your learning
Know what you get before you begin.
Every paid plan starts with seven days free. Nothing is charged until the trial ends; cancel any time. Choose your plan after creating an account.
Pro Reader
Everyday reading, fully unlocked.
$14.99/ month
- 6 hours of narration each month
- Natural standard studio voices
- Unlimited book imports
- 6 hours of narration each month
Pro
Technical books, narrated clearly.
$49/ month
- 12 hours of narration each month
- ElevenLabs premium voice library
- Everything in Pro Reader
- 12 hours of high-fidelity narration each month
Executive
Knowledge density, compressed.
$99/ month
- 25 hours of narration each month
- ElevenLabs premium voice library
- Everything in Pro
- 25 hours of high-fidelity narration each month
Pro Reader starts at $14.99/month. ElevenLabs premium voices are included with Pro ($49/month) and Executive ($99/month).
Your own reading library
Start with the book on your desk.
Bring an EPUB, a text-based PDF or a plain-text file. Aethel Audio keeps your library private to your account; protected Kindle and Apple Books files cannot be imported.