Now Open — Join the Challenge

Write it. Replay Your Thinking.

The world's first stroke-replay social platform. Share how you think — not just what you made. Calligraphy, hangul, math, drawing. No video needed.

Start Stroking Free Watch a Replay
❤️ 3.1k likes
🔥 12 day streak
Re-Stroke
94% accuracy
9:41●●●
alex.draws
Character · 2h
9:41●●●
🔥 12
LIVE CHALLENGE
Write "LOVE" Your Way ✨
2,841 entries · 23h left
min_k
Calligraphy · 3m
LOVE
3.1k
Re-Stroke
yujin.writes
Hangul · 12m
사랑
❤️ 5.6k
Re-Stroke
Feed
Trend
Challenge
Me
9:41●●●
prof.kim
Math · 1h
2 +C ✓
Trusted by creators worldwide
50k+
Stroke Replays
120+
Countries
2.8k
Daily Challenges
4.8
App Store Rating
How it works

Three steps to share your thinking

No camera. No editing. Just write — and your stroke becomes the content.

1
Write Anything

Pick a canvas ratio — portrait (9:16), landscape (16:9), or square (1:1). Then write, draw, or trace. Your strokes are recorded with precise timestamps automatically.

2
Replay is Generated

Your writing becomes a stroke replay — lightweight, seekable, and speed-adjustable. Not a video. It's stroke data, so anyone can watch at 0.5× or 4× with perfect clarity.

3
Share & Challenge

Post to the feed, join a live challenge, or send as a DM. Others can Re-Stroke — writing it in their own style. The community grows around the thinking, not just the result.

Live Challenges

Write it your way.
See how the world writes theirs.

Every challenge is a global canvas. Same word, infinite styles. Gothic, cursive, hangul, kanji — all in one feed.

Join a Challenge
Hangul Aesthetic · 사랑
Korean Stroke Order · Starts tomorrow
SOON
Kanji Beauty · 愛
Japanese Calligraphy · Starts in 2 days
SOON
🎨
1 Stroke Doodle · 5 sec limit
TikTok-style · Anyone can join
SOON
Features

Everything a stroke needs

Built from the ground up for handwriting — not repurposed from video apps.

Stroke Replay

Watch exactly how someone wrote — stroke by stroke, with timestamps. Speed from 0.5× to 4×. Seek to any moment. Loop any section.

Trace & Learn

Follow the ghost layer to trace any stroke. C++ DTW algorithm measures accuracy in real-time. Gamified with lives, streaks, and XP.

Re-Stroke

Take someone's work and write it your way. Not a retweet — a reinterpretation. One original becomes infinite variations across the globe.

Stroke DM

Send a stroke replay as a message. Instead of a photo of your notes, send the actual writing process. Your study buddy sees how you think.

Live Challenges

Weekly challenges with global leaderboards. Same prompt, your style. Calligraphy, hangul, kanji, doodles — no language barrier needed.

3 Canvas Ratios

Portrait (9:16) for stories, landscape (16:9) for wide formulas, square (1:1) for Instagram. Switch mid-session. Post to any platform.

See it in action

A replay is worth a thousand words

Watch how Gothic "LOVE" is written — stroke by stroke. Adjust speed. Seek to any moment.

LOVE — Gothic Calligraphy · min_k
LIVE REPLAY
LOVE
0.5×
0:34 / 1:12 👁 4,241 views ♥ 3.1k
Why Stroky

Built for handwriting,
not repurposed from video

Other apps record video. Stroky records strokes — lighter, richer, and built for the thinking process.

Feature
Stroky
Others (Video apps)
Stroke-by-stroke replay
Native
No
Speed control (0.5× – 4×)
Frame-accurate
~ Video only
Accuracy measurement
DTW algorithm
No
Seek to any stroke moment
Instant
~ Slow video seek
Re-Stroke (reinterpretation)
Core feature
No
Stroke DM messaging
Built-in
No
Math / Language / Art unified
All categories
~ Art only
File size (1min session)
~50KB .gss
~80MB video
Categories

One app, infinite styles

No language barrier. A beautiful stroke speaks to everyone.

✍️
English Calligraphy

Gothic, cursive, brush lettering, signatures. LOVE, DREAM, HOPE — one word, infinite interpretations.

Global · High virality
Hangul Stroke Order

사랑, 꿈, 빛 — Korean characters with stroke guides. Foreign learners love the satisfying replay.

K-content fans · Trending
Kanji & Hanzi

愛, 光, 心 — Japanese and Chinese characters with precise stroke order. Deeply satisfying to watch.

East Asia · High replay rate
🎨
Character Drawing

Trace a face, complete a character, add a hairstyle. Step-by-step drawing challenges anyone can join.

All ages · Challenge-friendly
Math & Logic

Calculus, integration, proofs — see exactly how someone solves a problem, step by step.

Students · Study groups
1 Stroke Challenge

One stroke. 5 seconds. TikTok-style format — extremely low barrier, extremely high shareability.

Viral · Beginner-friendly

Your thinking
deserves to be seen.

Join thousands of writers, artists, and thinkers already sharing their stroke replays worldwide.