The Problem
Most AWS Cloud Practitioner prep tools assume the user already understands cloud computing — they jump straight into service names and pricing models. But the Cloud Practitioner exam is AWS's true entry-level certification, meant for people with no cloud background at all. I saw a real gap: there was no product built specifically for someone starting from zero.
What I Built
Learn730 is a free, offline-capable study app covering the full AWS Cloud Practitioner (CLF-C02) exam:
- 200 original practice questions, weighted to match AWS's official exam domain breakdown exactly (24% / 30% / 34% / 12% across the four domains)
- 134 flashcards organized by domain, covering every core topic
- "Cloud 101" — an original beginner's on-ramp section explaining what cloud computing even is, before diving into AWS specifics
- No login, no paywall, no ads, no data collection
Tech Stack
FrontendVanilla HTML / CSS / JavaScript — no framework
PlatformProgressive Web App (Manifest + Service Worker)
AndroidTrusted Web Activity via Bubblewrap
HostingGitHub Pages (static, zero infrastructure cost)
DistributionGoogle Play Console — live in Production
SecurityDigital Asset Links verification, 2FA-protected repo
Real Problems I Solved
Data integrity: Audited the full 200-question bank and found — then fixed — a real statistical bias where one answer letter was correct nearly half the time. Rebuilt the letter distribution to a true even split.
Build failures: Diagnosed and resolved a Java version mismatch, a duplicate-resource conflict from mismatched icon file formats, and an incorrect package ID that would have blocked Play Store submission entirely.
Domain verification: The app initially opened showing a browser address bar instead of a native fullscreen experience. Traced this to a missing Digital Asset Links file, then correctly diagnosed a GitHub Pages quirk (Jekyll silently excluding dotfiles) blocking the fix — resolved with a one-line configuration change.
Compliance: Independently completed Google Play's full policy requirements — content rating, data safety disclosure, privacy policy, and store listing — for an Organization-verified developer account.
Results
How This Was Built
I'm not a software engineer, and I'm not pretending to be one. This app was built through AI-assisted development — I directed the full architecture, debugging, and shipping process using Claude, working through real production errors line by line until they were resolved correctly.
I believe directing AI effectively is a genuine, distinct skill — knowing what to build, how to catch when something's wrong, how to verify a fix actually worked, and how to own a project through to a live, working product. That's the skill this project demonstrates.
Links