A vs Dou

This app allows you to create interesting shapes using affine transformation. Affine transformation can do translation, rotation and scaling on object's coordinate. We do iterations, and in each iteration we apply the affine transformation on the object (circle, rectangle, star, polygon or line), coloured in gradient. At the end, you may like the result. Have fun.

Dou is a tiny private space for you and your person. Draw something, tap send, and it lands right on their home screen. Say good morning with a heart. Send a terrible drawing of your cat. Leave a little "miss you" for when they unlock their phone. Dou keeps couples and close friends close, even across cities. ON THEIR HOME SCREEN • Add the Dou widget and the newest drawing from your partner appears right on your home screen. • Perfect for long-distance couples: a small sign of love they see every time they pick up their phone. DRAW IT. SEND IT. • Glowing brushes: neon, comet, rainbow, aurora, sparkle, fire, sakura, galaxy and more, plus a kaleidoscope symmetry mode. • Paper styles for your canvas, with new ones added online. • Send to your partner, or to the close friends you choose. TALK, NOT JUST DRAW • Chat with stickers and reactions, right next to your drawings. • History keeps every drawing you sent and received. PRIVATE BY DEFAULT • No phone number or contacts needed. Connect with an invite code, link or QR. • Drawings only go to people you connected with. No public feed, no strangers. • Delete your account inside the app any time. PLUS • Optional subscription: all sticker packs and a larger friend list. Everything else is free. Good to know: how fast a widget refreshes depends on your phone's battery and system settings. For ages 16 and up. Privacy Policy: https://liveink.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/