Portfolio

Apps we design, build and run

Each product gets its own story: the problem, the approach, the stack — and what we learned.

Live · 2026

KanjiHub

Learn Japanese, from Hiragana to N1

A web app for phones and computers: spaced-repetition reviews, a world map of levels, handwriting, a full kanji dictionary and short daily videos with Akane, its fox guide.

  • SvelteKit
  • TypeScript
  • Cloudflare Workers
  • Cloudflare R2
  • Rust
  • WebAssembly
  • Supabase
  • SQLite
  • Capacitor
  • Resend
  • PostHog
  • +2

Live · 2026

Akane Studio

From a short script to finished lesson videos

Our in-house video pipeline: characters are voiced and lip-synced, captions light up word by word, kanji are built from their parts, and every video is reviewed before it's scheduled to five platforms.

In the works

Our next app

Something new is on the workbench — and it won't be about learning Japanese.

Let's build something great

Have an idea?
We'd love to hear it.

Whether it's feedback on one of our apps or just a hello — we're always open for a chat.

Get in touch

hello@sparklitt.com