Keet

Keet is a personal learning platform that describes itself as an app to generate courses on any topic. Rather than offering a fixed catalog of pre-recorded classes, it produces personalized, interactive courses that combine short explainer videos with Duolingo-style games and quizzes. Each generated course comes with a structured roadmap, so learners move through bite-sized lessons and build towards real understanding instead of jumping between disconnected resources. The product is backed by Y Combinator and is available as a download for iOS, where users create an account and start building courses on subjects ranging from mathematics and physics to history and engineering. Most online learning platforms ask you to choose from the catalog they already have. If the subject you care about is niche, such as the history of San Francisco, Mongol war tactics or the mechanics of modern rocket engines, the material you want may not exist as a structured, interactive course at all, leaving learners to assemble scattered articles and videos on their own. Keet approaches the problem from the other direction: the topic comes first, and the course is generated around it. The site states that Keet is different from other learning apps because it lets you generate personalized, interactive courses on any topic that have a structured roadmap to follow. That combination of arbitrary subject matter plus a roadmap is the core of the product's promise, and it is why the platform frames itself as personal rather than catalog-based. Course creation starts with a topic. The website shows examples across several disciplines: Topology under Mathematics, Quantum Physics under Physics, Yankee Traders under History and Modern Rockets under Engineering, alongside cover art for The Big Bang, History of San Francisco, Mongol War Tactics and History of New York City. When you create a course, you can customize it: Keet lets you set the desired depth, complexity and narration style, so the same subject can be generated at different levels and delivered in the style you prefer. Getting started is described simply on the site: download Keet and create an account to start building personalized courses. Finished courses appear as cards with cover art, such as Introduction to Topology, History of San Francisco, Yankee Traders and Modern Rocket Engines. Each course generates with a set of lessons that contain videos and quizzes to help you learn. The videos are short explainer videos, and the lessons are deliberately brief. The sample Topology curriculum lists lessons such as Sets and Subsets, Limits of Visualizing Sets, Paradoxes and the Universal Set, Set Operations as Boolean Logic, Complements and Subtraction, Element-Chasing Proofs and The Empty Set and Vacuous Truth, each marked at around four minutes. The accompanying quizzes test what the video has just covered, so understanding is checked immediately rather than at the end of a long module. Watching a short explanation and then answering questions about it keeps the learner active, which is why the format pairs a video with testing at every step instead of separating teaching and assessment. Testing is delivered through games. Each lesson has several games that you can play to test your knowledge, and the site lists the formats available: Multiple Choice, Swipe, Order, Connections and Custom. Multiple Choice, for example, presents a question such as what the primary function of mitochondria in a cell is, offering options including protein synthesis, cell division, energy production through ATP synthesis and DNA replication, followed by a Check button to confirm the answer. Moving between formats, from swiping to ordering items to finding connections, turns review into something closer to Duolingo-style practice than a conventional quiz, which makes repetition more engaging and helps knowledge stick through varied recall. Courses have structured roadmaps, which are the backbone of how the material is organised. In the Topology example, the roadmap is divided into modules, and each module into lessons. Module 1, Abstract Set Theory, contains Lesson 1 Sets and Subsets, Lesson 2 Functions and Preimages, Lesson 3 Equivalence Relations and Lesson 4 Cardinality and Infinity. Module 2, Topological Spaces, covers Topological Spaces, Closed Sets and Closures and Topological Bases. Module 3, Continuity and Space Construction, includes Continuous Functions plus Subspace and Product Topologies. Module 4, Topological Properties, closes with Connectedness, Compactness and Hausdorff Spaces. Modules carry their own sticker artwork, and lessons list their individual topics and durations. The roadmap makes it easy to learn in bite-sized chunks, because each lesson is a small, finishable unit placed in a defined order that builds towards real understanding of the whole subject rather than offering isolated facts. Overall, Keet works in a generate-then-follow loop. You name a topic, adjust depth, complexity and narration style, and Keet generates a course: a set of lessons containing explainer videos and quizzes, grouped into modules that form a roadmap, with games attached to each lesson for practice. From there the experience is guided. The roadmap tells you what comes next, the video explains it, the quiz confirms it and the games reinforce it. Because the course is generated rather than curated from an existing library, the same mechanism applies whether the subject is a formal academic field like topology or a narrower historical topic. Access begins in the iOS app, where creating an account is the first step. For learners, the practical benefit is that the subject they actually want to study is the one they get a course about, with a structure that removes the guesswork of where to start and what to cover next. Lessons of roughly four minutes fit into spare moments, so progress does not require blocking out long study sessions. Quizzes and games provide immediate testing, which turns passive watching into active recall and gives fast feedback on what has been absorbed. Customisable depth, complexity and narration style mean the same topic can be matched to different levels of prior knowledge, so a beginner and a more advanced learner can generate different courses from the same subject and work at a pace and tone that suits them. The examples on the site hint at the range of use cases. A learner curious about mathematics can generate Introduction to Topology and work through abstract set theory, topological spaces, continuity and space construction, and topological properties in order. Someone interested in history can build courses such as History of San Francisco, History of New York City, Yankee Traders or Mongol War Tactics. A physics enthusiast can generate Quantum Physics, and an engineering-minded learner can study Modern Rockets or Modern Rocket Engines, or start from a topic like The Big Bang. In each case the workflow is the same: pick the topic, customise the course, then follow the roadmap lesson by lesson, watching explainer videos and playing the games that come with each lesson. Keet is positioned as a personal learning platform for anyone who wants to learn about a subject on demand, and the examples span academic disciplines, history and engineering, which suggests it is aimed at curious, self-directed learners rather than institutions. The product is downloaded for iOS, and iOS is the only platform named on the site, with the download linked to the App Store. Cost is described on the site in terms of credits rather than a subscription: if you sign up now you get two free courses, and after that you need to purchase credits to generate more courses. The site also notes that Keet is backed by Y Combinator. Keet's value proposition is straightforward: generate a personalized, interactive course on any topic, then learn it through short explainer videos, quizzes and Duolingo-style games arranged on a structured roadmap. It replaces the search for scattered material with a generated curriculum that is customisable in depth, complexity and narration style, and it makes progress tangible through modules, lessons and games. For learners who want a specific subject taught in a bite-sized, interactive format, from topology to the history of San Francisco, Keet offers to build the course on demand.