Compare · Text-to-speech reader
Aethel Audio vs NaturalReader
NaturalReader has read documents aloud for many years, on the web, as a browser extension and in mobile apps, with a wide choice of languages and voices. Aethel is built for one job: technical books and papers, where the notation, figures and tables need to make sense by ear. If you need many languages for everyday documents, NaturalReader is a solid choice; for dense STEM material, compare a chapter in both.
Last reviewed 6 October 2026. NaturalReader is a product of NaturalSoft; this page is not affiliated with or endorsed by NaturalSoft. Something out of date? Tell us and we will correct it.
Side by side
What it is
NaturalReader: A general text-to-speech reader for documents and web pages
Aethel: A study reader for technical books and research papers
Languages
NaturalReader: A wide range of voices and languages
Aethel: 17 reading languages, with chapter translation between them
Equations
NaturalReader: General-purpose narration; equation handling isn't a documented focus
Aethel: Notation read as maths, with the printed formula on screen
Figures and tables
NaturalReader: Focus is on narrating the text
Aethel: Spoken description where the text cites them
Audio files
NaturalReader: Audio export on paid plans
Aethel: Save chapters offline and export them as MP3
Study tools
NaturalReader: Focus is on listening
Aethel: Ask about a passage, worked examples, review cards
Price
NaturalReader: See NaturalReader's current prices
Aethel: Free: 5 books and 1 hour of narration. Pro Reader $14.99/month (6 h, standard voices). Pro $49/month (12 h, ElevenLabs voices). Yearly plans save about two months. All plans
Choose NaturalReader if…
- • You need text-to-speech in many languages for everyday documents.
- • You want a browser extension for web pages.
- • You need OCR for scanned pages.
Choose Aethel if…
- • You study maths-heavy books or papers.
- • You want figures and tables described in the narration.
- • You want explanations and spaced review alongside listening.
Test it on your hardest page
The fairest comparison is your own material. Import the same maths-heavy chapter into both and listen to a page with equations. Here is what Aethel says for a classic:
Attention(Q, K, V) = softmax(QKᵀ / √dₖ)V
Aethel says
Attention of Q, K, V equals softmax of the quantity QK transpose over the square root of d sub k, times V
Vaswani et al., “Attention Is All You Need”, NeurIPS 2017, equation 1
Questions
Can I download Aethel narration as audio files?
Yes. Chapters you save for offline listening can be exported as a single MP3 for your own use.
Which languages does Aethel read?
English, Spanish, French, German, Italian, Portuguese, Polish, Dutch, Swedish, Turkish, Japanese, Korean, Chinese, Hindi, Arabic, Russian and Greek.
Other comparisons
Hear your own book this way.
Free to start: five books and an hour of narration, no card needed.