Rerein | Homepage
🩷 Welcome to Rerein

Making girls' health make sense.

Think about how much you've learnt about the world around you. Now think about how much you've had to figure out about yourself.

We hear things like “it's just hormones” or “everyone goes through it”. But what does any of that actually mean when you're the one experiencing it?

Start here
How we can help

Girls don't always have the words.
Parents don't always have the answer.
Schools don't always have the resources.

Support for Girls 8-16

From her first period to her latest "is this a thing?!" moment. Periods, puberty, hormones, body image and everything in between, explained through games, girl talk and real science that actually makes sense.

Support for Parents
& Carers

A space for understanding what she's going (growing) through. Support for the tricky topics and knowing where to turn when something needs a little more support.

Support for Schools
& Teachers

The lesson planning bit? We've got that covered. Deliver statutory RSHE and health education in an enaging, interactive, and safe way6x Ready-to-teach, interactive health education packs to use alongside your

Let's get you to the right place...

Whether you’re here to understand your own body, help someone else understand theirs, find support or bring better conversations into the classroom, there’s a place to start.

📱 Body OS
Body OS app screens on the App Store

Meet Body OS

Your body has its own operating system always running in the background: apps, notifications, settings... A little less textbook, a lot more “tap to reveal!” 👆

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💕 Support for parents
A father and daughter looking at a notebook together

For parents & carers

Is this normal, should I be worried? Understand what might be happening underneath the “I’m fine”.

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🚌 Support for schools
A teacher and students in a classroom

For schools & teachers

Ready-to-go lessons, interactive activities, teacher resources and student-friendly translations.

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💜 Support for ED
A mum and daughter sitting at a table with plates

Eating Disorder Support

A space for recovery, understanding what’s happening, whether it's for yourself, or supporting someone you love.

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The gap between “they covered it” and “I get it”

They taught the class, but did it click?"

From her first period to her first day at secondary school, changing friendships, teenage hormones and everything in between. Body OS by Rerein makes growing up a little easier to understand, for girls aged 8 to 16 and the people growing alongside them.

Girls aged 8–16Parents & carersFree resources
Meet Body OS by Rerein→

“Is this normal?”

A safe place to explore periods, hormones, body changes & body image.

Meet Body OS by Rerein 📱

Body OS creative describing puberty as the biggest software update

POV: you have just had the biggest software update

Also known as puberty. Body OS turns all the new settings, changes and surprise notifications into something she can actually understand.

Girls Glossary inside Body OS

The Girls Glossary

The words she hears at school, online or in a doctor’s room, translated into language that makes sense in actual girl world.

Hormone HQ inside Body OS

Hormone HQ

Meet the hormones running the group chat, the messages they send and why her mood, skin, energy or appetite can suddenly switch up.

Textbook terminology translated into girl talk inside Body OS

From textbook terminology to girl talk

She gets the proper science, the translation and the easily missed real life bit, so she can understand what a term might actually mean for her.

SOS chat search inside Body OS

SOS chat search

For the “I need to know this right now” moments. She can type what is happening and find the part of Body OS that can help her make sense of it.

Thought Translator app inside Body OS

The Thought Translator

For when one thought starts sounding suspiciously like a fact. She can slow it down, look at what is underneath it and find a kinder way to speak to herself.

Free support for the stuff nobody properly explains

Pick your current “wait, what?” and let’s figure it out together.

Free interactive tools and resources for the body stuff, life stuff and awkward stuff everyone assumes and expects you to already know.

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Girls Glossary

A list of words nobody explained properly, translated into what they actually feel like. "

Find out more →
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Hormone HQ

Meet the hormones behind moods, growth, skin, periods, and more.

Find out more →
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Eating Disorder Support

Whether you’re 14 and drowning in school and social media or 34 and untangling your 'healthy era' this space is for you.

Find out more →