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iOS appShipped 2025

Alfie Colouring

AI-generated colouring pages for curious kids.

What it is

Most kids' colouring apps recycle the same hundred templates. Alfie Colouring takes a different approach: every page is generated on the fly from whatever your child types or asks for, so the catalogue is effectively infinite. "A friendly dinosaur eating spaghetti." "My cat as a pirate." "Cement mixer with butterflies." The app turns the request into a clean, kid-appropriate line drawing in seconds, ready to colour in the app or print on paper.

Why we built it

The first version was for our own kid, who burned through every printable sheet on the internet within a fortnight. We realised the bottleneck wasn't drawing tools or storage - it was content. Generative AI was finally good enough to make new pages as fast as a four-year-old can ask for them, and friendly enough to be safe by default.

What makes it

  • Type any prompt and get a printable colouring page in a few seconds
  • Built-in moderation so the requests stay age-appropriate without parents policing every input
  • Save, print, or colour directly in the app
  • No ads, no in-app upsells targeted at children
  • Designed for ages 3-9 - reading isn't required

Try Alfie Colouring

Free on the App Store - no sign-up to start.

Get on the App Store

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About

A small team, building things we'd want to use ourselves.

Sentium is a small, focused technology studio building consumer products for everyday life. We design and ship our own apps end-to-end - product, engineering, content - with a bias toward privacy-first design and experiences families and individuals can trust.

We work in tight iterations, ship to real people, and learn from what they tell us. Less ceremony, more shipping. Most of what we make is for the people we know - kids, parents, friends - and that keeps the bar honest.