Duolingo-style AI concepts learner
The assignment
Build an app that makes you learn AI concepts the Duolingo way. Wire it up with PostHog for analytics.
✳What Ritu shipped
This app carries the tagline ‘Speak AI fluently in your next meeting,’ built for PMs, designers, and founders, with a guest mode requiring no signup. It's organized into four units of three lessons each, framed around real workplace moments like reading a vendor sales deck or evaluating a PRD, and covers supervised and unsupervised learning, neural network basics, transformers and attention, LLMs and tokens, embeddings and vector search, RAG and prompting, and hallucinations and AI safety. Streak, XP, and level indicators track progress through the lesson path, and the app fires live PostHog analytics events as learners navigate lessons.
✳Our read on this build
Ritu shipped a deployed web app you can open. This read comes from the artifact and Ritu's own account of it — no scores, just what the build does and does not show.
What it demonstrates
- The return loop is real: streaks, XP and levels — the mechanics that make a habit instead of a bookmark.
- The syllabus is the real vocabulary — tokens, embeddings and attention — not a tour of how AI is changing everything.
- PostHog, analytics and event tracking appears in the shipped product — the tell of a builder who wants to know how it is actually used.
Take this awayCopy the discipline more than the curriculum — instrument on day one. Shipping without analytics makes your next iteration a guess.
✳Why this quest matters
Retention is a design problem, not a content problem. Wiring PostHog in from day one is the tell of a builder who ships to learn from real behaviour — rather than to admire their own screenshot.
✳What separated the strongest builds
A loop worth coming back to
Bite-sized lessons, instant feedback, and a reason to return tomorrow — streaks, XP, spaced review. A long article with a quiz at the end is not the Duolingo shape.
Concepts that are worth the streak
Tokens, embeddings, attention, hallucination, RAG — the vocabulary a PM needs in a real conversation, not 'what is AI' trivia.
Instrumented, not just launched
PostHog wired in and firing real events. An analytics claim nobody can verify tells a reader nothing about how the product is used.
No numeric scores are published here. These pages are written reads of what each builder shipped — the build is the point, not a mark out of a hundred.