Features
Everything your study pal can do
It reads your material with you, answers your questions from it, and soon checks that you've really got it. Here's how each part works.
The Lektorat
Every sentence checked for how it sounds
A voice can't read a bullet point, an arrow or “see Fig. 4.2”. The Lektorat rewrites only what fails by ear and keeps the rest as the author wrote it. Then a second editor, which didn't write the script, checks it against your source for listenability, fidelity and comprehension, and anything it flags is fixed and checked again.
All examples below are from the demo chapter on the home page.
Lists become flowing prose
On the page
Economists usually distinguish four sources:
- Externalities
- Public goods
- Information asymmetries
- Market power
In your ears
Economists usually distinguish four sources. The first is externalities, the second is public goods, the third is information asymmetries, and the fourth is market power.
Arrows become cause and effect
The rule: A → B → C becomes “A causes B, which in turn leads to C”. Every link gets its own verb, so you hear the direction of each step.
On the page
The causal chain is: production ↑ → emissions ↑ → health costs ↑ (see Fig. 4.2).
In your ears
The chain of cause and effect works like this: more production leads to higher emissions, and higher emissions in turn drive up health costs.
Tables become spoken comparisons
On the page
| Source | Typical response |
|---|---|
| Externalities | Pigouvian tax, tradable permits |
| Public goods | Public provision |
| Information asymmetries | Disclosure rules |
| Market power | Competition law |
In your ears
Each source of market failure has a typical policy response. Externalities are usually addressed with a Pigouvian tax, or with tradable permits. Public goods are typically provided by the state itself. Information asymmetries are tackled with disclosure rules, and market power with competition law.
Citations without the page numbers
Years, page numbers and editions are dropped. The author's name stays only when the argument depends on who said it.
On the page
When those conditions are violated, the result is market failure (Mankiw 2021, p.
Regulators may lack information or be captured by the industries they regulate (cf
In your ears
When those conditions are violated, the result, according to Mankiw, is market failure. Regulators may lack information, or they may be captured by the very industries they regulate.
Symbols and abbreviations spoken out
On the page
A Pigouvian tax sets the tax rate t ≈ marginal external cost (MEC).
In your ears
A Pigouvian tax sets the tax rate roughly equal to the marginal external cost, that is, the cost the firm imposes on others.
Never invents
Audiobook mode keeps every statement, example, definition and number. Nothing is added except spoken transitions.
Checks meaning, not just style
Causal direction, negations, “only if” and exceptions are compared against the source, sentence by sentence.
Shows its work
Each section has a report: scores for listenability, fidelity and comprehension, and every change it made.
Hold to ask
Answers only from your material
Hold Space or the button, ask out loud, let go. The narration pauses and the answer is spoken in a second voice. Typing works too.
- Answers use your uploaded material only, never general knowledge. That's the point: it's what your exam is based on.
- Each claim comes with a short verbatim quote from your source. Tap it to jump to that sentence.
- “This” and “that” refer to what you just heard, so you can ask the way you'd ask a person.
- Quick buttons for “explain that more simply” and “give me an example from the text”.
Captions and transcript
Read along whenever you want to
Live captions
The sentence being spoken, large and readable, with the one before it for context.
Full transcript
The whole narration with your position highlighted. Tap any sentence to hear it.
Source view
The original passage behind the current sentence, with its page number, so you can find it in your book.
Play at 0.75× to 2×, pick up where you stopped, and use the keyboard: Space to play and pause, ← and → to move by sentence, T for the transcript, S for the source.
Book library and section finder
Upload the book once. Find any chapter by asking.
Put whole books into your library, up to 500 MB each. Then describe the part you need the way you'd say it to a friend.
- Books with bookmarks or a text layer get their outline straight away.
- Scanned books get a one-time page map: the printed page number, headings and topic of every page. That's how “page 693ff” finds the right PDF page even when the scan starts with 95 pages of front matter.
- You see the pages it found, the first and last lines, and a list of checks. Nothing is generated until you confirm.
- Only the pages you need are processed, not the whole book.
Check-ins and practice tests
Coming soonYour study pal checks you've got it
Listening isn't the same as understanding. While you listen, your study pal pauses for a quick check-in question about what you just heard, and replays the part you missed. Before the exam, turn any chapter in your library into a practice test of 20 to 100 questions: multiple choice scored with points, or open answers assessed after you submit them. Questions come from your material, like everything else.
Languages
Coming soonSummaries in the language you study in
Audiobooks stay in the original
An audiobook is always narrated in the language of your material, so every term sounds the way it will look in your exam.
Summaries in your choice
Coming soonPick the output language for each summary, for example a German summary of an English textbook. Today StudyBoom works with English material; German and more languages are next.
Notes export
Your questions become your notes
Every question and answer is saved with the chapter, grouped by section, with the cited passages and their page numbers. Delete the ones you don't need and export the rest as a Markdown file for Obsidian, Notion or any editor.
Exporting the audio (MP3) and captions (.vtt) is coming soon. Coming soon
# Notes: Why Markets Fail ## 4.1 Sources of market failure **Q:** Why does more production lead to higher health costs? **A:** Your text says production creates emissions as a side effect… > “imposes costs on third parties” (p. 113) > “the factory does not pay these costs” (p. 114)
Hear what your own chapter sounds like
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