Penna combines the tactile warmth of a notebook with the precision of modern analysis. Features designed to refine your handwriting without overriding your intent.
A clear 1–10 legibility rating, plus five sub-scores: legibility, letter consistency, spacing, baseline alignment, and stroke quality. Anchored to everyday readability — not calligraphy craft.
Your original photo is held in memory only during analysis and never written to disk. Analyses live in your account until you delete them. Full privacy policy →
A Gemini-powered image-to-image edit marks problem areas directly on your photo — circles, carets, height guides, wavy underlines. Your original handwriting stays fully visible underneath.
Each improvement tip is pinned to a specific word from your actual writing. No generic advice — only context-aware tips.
One focused exercise targeting your single biggest issue. Pen and paper only — no app needed for the drill itself.
Past analyses live on-device and on your account. Progress charts over time are coming in v1.5.
An interface built for focus, not engagement metrics. No notification badges, no pressure-streaks, no gamification. Just you and the page.
Ready to start improving?