marrow - scroll to learn
Learn one idea at a time
Free · Designed for iPad. Not verified for macOS.
A feed of self-contained ideas across CS, finance, math, and science. Scroll, reveal, and let spaced repetition bring the ones worth keeping back around.
marrow is a feed of ideas worth keeping.
Instead of an endless scroll of noise, you move through short, self-contained explanations (one concept per screen) across computer science, finance, math, and science. Each card explains a single idea in a few sentences: why appending to a dynamic array is O(1) on average, what the Rule of 72 estimates, and dozens more.
Some cards ask you a question first. Reveal the answer, then tell marrow how well you knew it. The ones you find hard come back sooner; the ones you already know drift further out. That is spaced repetition, built into the scroll, so the ideas you want to keep actually stick.
- One idea per screen, made for short sessions
- Four domains: computer science, finance, math, and science
- Self-grading with spaced repetition, so reviews return at the right time
- Fully offline: no account, no ads, no tracking. Your progress stays on your device.
Scroll to learn.
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The developer, Pratyush Saxena, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Pratyush Saxena
- Size
- 41.7 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Pratyush Saxena