Krumbit vs marrow

Learn something useful every time you scroll. Krumbit is a microlearning app that turns short-form scrolling into short-form learning. Watch quick video lessons on science, health, history, and everyday facts, then take a fast quiz to lock in what you just learned. Built for people who love the pace of short videos but want something smarter, Krumbit helps you build a better habit without giving up the format you already enjoy. Whether you are on your commute, taking a quick break, or winding down at night, you can make real progress in minutes. What you can do in Krumbit: Watch bite-sized video lessons Take quick quizzes after each lesson Build a daily streak and track your progress Explore science, health, history, and everyday facts Send feedback directly in the app and help shape the product Krumbit makes scrolling feel productive: fast, visual, and actually useful. Download Krumbit and turn your scrolling habit into a learning habit.

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.