스승 Seuseung

A fitness app for your AI prompting. Score, diagnose, and improve every prompt across 6 dimensions.

스승 (Seuseung) — A Fitness App for Your AI Prompting 스승 is the Korean word for a revered life mentor — deeper than teacher, closer to master. Most prompt tools rewrite for you. 스승 trains you, so you get stronger every session. ─── WHERE IT LIVES ─────────────────────────────────── Injected directly inside Claude, ChatGPT, and Gemini. No copy-paste. No tab switching. Type your prompt, click the floating 🎓 button, and your lesson slides in. ─── YOUR PROMPT WORKOUT ────────────────────────────── ✦ 6-dimension score — Clarity, Context, Specificity, Structure, Tone, Completeness ✦ Diagnosis — exactly what's weak and why ✦ Stronger version — rewritten and optimized for your AI ✦ 스승의 가르침 (The Master's Teaching) — named explanations of each change with the cognitive reason it works ✦ Transferable principles — 3 lessons to carry into every future prompt ✦ Score history — track your improvement over time ─── PER-AI OPTIMIZATION ────────────────────────────── Claude → XML structure tags: <context><task><format> ChatGPT → Persona framing + numbered step-by-step Gemini → Clean section headers + structured format ─── MULTILINGUAL ───────────────────────────────────── Korean, English, Spanish, Arabic, Japanese, Chinese. 스승 detects your language and responds in kind. ─── FREE & PRO ─────────────────────────────────────── Free: 10 lessons per day · full features Pro: Unlimited · $4/month or $29/year ─── PRIVACY ────────────────────────────────────────── Prompts are processed, never stored. No account required for free tier.