Project Case Study
Lemmi Studio
AI-powered marketing kit for fast-moving app teams
Turns raw app screenshots into App Store image sets, landing-page files, and launch copy. Built solo with auth, billing, AI generation, and an editor.
Metrics
1 month (solo, nights & weekends)
Build time
50+
Features shipped
7+ supported
Languages
01
Overview
Lemmi automates the “last mile” of an app launch. Upload screenshots and product notes → receive fully composed visuals, copy, and a launch-ready landing page in under 15 minutes.
02
Key Highlights
- AI-powered assets: device-framed screenshots, gradients, and typography rendered automatically.
- Multi-language copy: App Store descriptions, keywords, and promo text tuned for 7+ languages.
- Landing page builder: deployable HTML/CSS/JS package that mirrors the generated assets.
03
Technical Notes
- Node.js/Express + Prisma backed by Supabase Postgres for auth, storage, and data.
- Custom React canvas editor with GPU-accelerated transforms for 60fps drag/drop.
- Stripe billing and credit tracking with optimistic UI updates and webhook sync.
04
Results
- Full SaaS delivered in one month with auth, billing, editor, generation, and export flows.
- High-res export pipeline renders ten 1200×2600 images in under eight seconds.
- Pricing tiers tailored to indie budgets (Free / $19 / $49) with clear upgrade paths.