Now in beta — iOS, Android & Web
Your reading sidekick
LevelUp brings all of your content into a calm, AI-supported experience. Ask a question and your sidekick searches the whole book to answer it. Listen or read, with seamless transition between the two.
Full-featured free tier available
Moby-Dick · Ch. 36
Ask
▶ Listening
Receiving the top-maul from Starbuck, he advanced towards the main-mast with the hammer uplifted in one hand, exhibiting the gold with the other, and with a high raised voice exclaiming:
“Whosoever of ye raises me a white-headed whale with a wrinkled brow and a crooked jaw; whosoever of ye raises me that white-headed whale, with three holes punctured in his starboard fluke—look ye, whosoever of ye raises me that same white whale, he shall have this gold ounce, my boys!”
12:41 · 1.2×
Read ⇄
The problem
Your learning is scattered across many places. LevelUp centralizes these threads into an AI-native e-reader (and listener)
Books
AI chats
PDFs
Web
Notes
Revelation Space
Alastair Reynolds
18
Resurgam Orbit, 2566
They lifted from Resurgam, quickly lancing into the clear skies above the storm. Eventually there was something above Sylveste, small at first and really only visible because it occasionally occluded the stars behind it. It looked no larger than a sliver of coal, but it kept on growing, until its roughly conical shape became obvious, and what had at first seemed like a silhouette of total blackness began to show faint details within its own shape, gloomily underlit by the world around which it was orbiting. The lighthugger grew until it seemed impossibly large, blocking half the sky, and then kept on growing.
Book chat
Chapter 18
GPT Luna ▾
Tap to speak
Ask about this chapter…
01 — Recap & Ask
Forgot a character or concept? Ask for a recap.
Your sidekick searches everything you’ve already read, picks the passages that explain it, and gives you a summary. Easily peruse the source passages. Discuss the book in a chat with the full book as context.
The Power Broker · Chapter 17
Save to Brain
Chat
Recap
The fight over the Taylor Estate—now to be named Heckscher State Park—had been an all-out one, of course, but there would be a significant difference this time. The issue in the first case had been that of millionaires blocking the public; in the Northern State Parkway case, it would be that of a millionaire giving $10,000 to keep his private golf course untouched and the money being used to throw hard-working farmers off their land.
Whether Roosevelt was motivated by the threat of public disclosure to prevail on Moses to compromise is not definitely known. But the following sequence of events is clear. On October 23, 1929, Clark gave Roosevelt what amounted to an ultimatum.
Recap
“The fight over the Taylor Estate”
8 selected passages
Moses saw the Taylor Estate as a potential public park and persuaded its owners to grant him an option to buy it for $250,000. But Havemeyer, Hollister, and Macy wanted the property for a private development; they persuaded the corporation to reject Moses’s option and sell it to them instead. Moses then appropriated the estate and used state troopers to keep them out. ① ② ③ ④
The owners argued that Moses had skipped the required negotiations and taken the land without legally available funds. Governor Smith ultimately signed the appropriation form, but the fight spread through the Legislature and the courts. ⑤ ⑥ In a later trial, a jury found the first appropriation illegal and assessed damages against the commissioners, while the judge’s ruling treated a second appropriation as legal. ⑦
Meanwhile, Moses developed the estate as a park, building roads, parking areas, and facilities before the higher courts settled the dispute. By the time the case reached the Court of Appeals, the estate was already open to large numbers of visitors. ⑧
1
Estate discovered
Chapter 9
2
Moses secures option
Chapter 11
3
Owners block sale
Chapter 11
4
Moses seizes estate
Chapter 11
5
Legal objections
Chapter 11
6
Smith backs appropriation
Chapter 11
7
Trial verdict
Chapter 12
8
Park built during appeals
Chapter 12
Recap
Highlight a name, place, or term. Your sidekick finds the passages that introduced it and refreshes you.
Ask
Chat with modern AI models that immediately have the full book as context.
Cited
Recap answers link to the source passages, with a quick way to re-read those parts.
Moby-Dick · Ch. 36
Ask
▶ Listening
Receiving the top-maul from Starbuck, he advanced towards the main-mast with the hammer uplifted in one hand, exhibiting the gold with the other, and with a high raised voice exclaiming:
“Whosoever of ye raises me a white-headed whale with a wrinkled brow and a crooked jaw; whosoever of ye raises me that white-headed whale, with three holes punctured in his starboard fluke—look ye, whosoever of ye raises me that same white whale, he shall have this gold ounce, my boys!”
12:41 · 1.2×
Read ⇄
02 — Read or listen
Seamless transition from reading to listening.
This helps to keep the thread going on your current favorite pieces of content.
a.
Natural voices. Narration you can listen to for hours, at any speed.
b.
Synced position. Switch mid-chapter and the text is already scrolled to where the voice left off.
c.
Ask while listening. Pause, ask your sidekick, keep going.
03 — Summary mode
When a chapter drags, speed it up.
Switch any chapter to summary mode, selecting both summary length and quote density. Quote density allows you to keep the author's voice front and center (if desired) while speeding up the filler that is often present.
Full text
Summary
Length
Medium
Quote density
High
Ch. 3 · The Lazy Controller · summary, 4 min instead of 31
Kahneman’s point here is that effortful thinking is expensive, so System 2 avoids it whenever it can. He calls this the “law of least effort,” and shows that when we’re busy or depleted, we default to intuition and lose self-control: “people who are cognitively busy are also more likely to make selfish choices, use sexist language, and make superficial judgments.”
The chapter closes on the idea that some people are simply more “engaged” than others — he borrows Stanovich’s distinction between intelligence and rationality to argue that “intelligence is not only the ability to reason; it is also the ability to find relevant material in memory and to deploy attention when needed.”
04 — Your Brain
Knowledge that compounds instead of evaporating.
Every highlight from every book, paper, and article lands in your Brain. Your sidekick will be able to reference more and more of your saved passages (and chat summaries) over time.
Saved to Brain · 1,284 highlights
“The law of least effort applies to cognitive as well as physical exertion.”
Thinking, Fast and Slow · 2024
“We found that participants under cognitive load were significantly more likely to choose the default option.”
Johnson & Goldstein, PDF · 2023
“Make the desired behavior the path of least resistance.”
Atomic Habits · 2022
What have I read about why people stick with defaults?
From your Brain · 3 sources across 3 years
Three threads you’ve highlighted converge on the same idea. Kahneman frames it as the law of least effort — the mind avoids costly thinking. Johnson & Goldstein measured it: under cognitive load, people pick the default. And Clear turns it into advice — make the desired behavior the path of least resistance. You saved the Kahneman passage first, in 2024; the other two were saved before you’d read him.
Open all three passages
Turn into a note
Content sources
One space for all of your content.
Bring your own, or have AI generate quality content for you using our Deep Research or connecting a coding agent.
Pricing
Paid plans get the LevelUp eInk device.
Free
$0
forever
All features available, with generous monthly usage limits.
—
All features: Ask, Recap, Summary mode, narration, Brain
—
All content sources, including Deep Research and courses
—
Luna-class models, with monthly limits
—
iOS, Android, and web
Start free
Pro
$10
per month
Uncapped usage and a loaner E-Ink device
—
Unlimited Luna-class models
—
Premium models unlocked, with usage limits
—
eInk reader on loan — $100 refundable deposit
—
Everything in Free
Get Pro
The LevelUp eInk reader. Mailed to Pro subscribers with a $100 deposit, refunded when you cancel and send it back.
Start reading with a sidekick.
Create a free account, then grab the app and pick up where you left off — reading or listening.
Free to start. No card required.