An independent studio for children & families
HinaYuri Labs is named after two little girls, and built by their dad. We make calm, honest apps that grow up alongside children — from first scribbles and first songs to the big questions they ask at bedtime.
No ads. No trackers. Just good things to learn.
Hina 雛
A little chick — the small ones, still learning to fly.
Yuri 百合
A lily — it grows quietly and opens in its own time.
Together, the whole journey: from a child's very first years until the day they fly on their own.
Why we exist
To help children grow up curious, capable and kind — with technology that knows when to step aside.
A better future for children, where every app a child opens is made the way a loving parent would make it: gently, honestly, and with their whole life in mind.
Our apps
Each app is its own small world, with its own name and its own home on the web. More are growing.
sketchling.hinayurilabs.com
Learn to draw on real paper
Teacher Juno draws step by step; your child follows with a pencil on real paper, snaps a photo — and watches the drawing come alive.
melodust.com
Sprinkle a little magic on your music
Upload sheet music — a PDF, a photo or a MIDI file — and Melodust turns it into an accurate MIDI and MusicXML, a glowing interactive score on a real piano, and beautiful practice videos. A library of verified piano scores and a Practice Room help learners play a little better every day.
Our promises
We collect only what an app truly needs, never sell or share data for advertising, and make deleting everything easy. This website doesn't even use cookies.
No advertising in our children's apps. No nagging streaks, no loot boxes, no buttons designed to be tapped by accident. Anything that costs money or leaves the app sits behind a grown-up check.
The best moments happen on paper, at the piano, out in the world. Our apps teach, then step aside — so time with them leads somewhere.
Every lesson is drawn, sung and played at our own kitchen table first — by Hina, Yuri and their friends, who are honest critics.
From little ones to curious kids, from teens to young adults: we're building a family of apps that keeps pace with your child, one stage at a time.
Our story
First scribbles, first songs, bedtime questions, and the day they no longer need your hand. Every parent walks that road. This studio is how one dad decided to walk it — and to make something good for all the children walking it too.
Read the whole storyHow we build
We start with children and parents — what they love, what frustrates them, what they wish existed.
Paper prototypes, then early builds, tested at our own table. If a five-year-old can't use it alone, we start again.
Accessible, fast on older phones, honest about data, and translated by people who care about the words.
Calm updates, real support, and a promise to answer every email. Apps for children deserve to be looked after.
We're parents too. Tell us what your child needs — we read every message.
