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Body OS by Rerein

Periods, hormones & growing up
Andie Butler · Education
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App info

Developer
Andie Butler
Category
Education, Health & Fitness
Released
Sep 21, 2026
Version
1.0 (Sep 21, 2026)
Price
Free
Size
55.6 MB
Requires
iOS 16.4
Age rating
13+
Languages
English

In-app purchases

Body OS by Rerein$34.99
Body OS by Rerein$3.99
Current prices, App Store US.
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About Body OS by Rerein

The user manual your body forgot to come with. Body OS helps make periods, hormones, puberty, body changes and the “wait… what is my body doing?” moments make a lot more sense. We take the complicated health “what’s wrong with me?!” terminology and translate it into relatable, real explanations and experiences that make you go: “Ohh. That makes SO much sense.” Think of your body like a phone: (Growing up is a BIG software update.) • You (yes, you) are the phone. • Hormones are your notifications. • Your cycle phases are different phone modes. • Different parts of your body are different apps. No “eww”. No awkward whispering. Just what’s actually going on, in a way you can actually understand. Explore Body OS for free, for as long as you like. Unlock the full experience with an optional Body OS Membership. BODY OS FREE INCLUDES: • Hormone HQ • Girls’ Glossary • Body App Store and body…
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