Seed
Free forever
Up to 30 students
All core features. No credit card.
Start free
7 starter templates
A knowledge home for fitness schools.
Programming, terminology and the why beneath the work.
→ See a quick tour
Free for up to 30 students
UK GDPR · EU (London)
Works offline
A fitness school stands or falls on the quality of its programming and the trust between coach and student. Whether you run Pilates classes, calisthenics, strength and conditioning, CrossFit, HIIT, or mobility work, students need to understand the why beneath the work as well as the what.
C3NTR gives your members a calm place to read. Articles on each movement and progression, terminology glossaries, mobility and recovery work, programming notes, and the principles that hold your method together. Coaches stay aligned; members come to class informed.
Find your method below, or browse all seven fitness disciplines we have starter templates for.
7 fitness disciplines
Each discipline has a starter template you can import in a few taps. Pick yours below.
Boxing Fitness
Levels, beginner, intermediate, advanced
See boxing fitness →Calisthenics
Levels, beginner, intermediate, advanced
See calisthenics →CrossFit
Scaled, intermediate, RX (or your box's progression)
See crossfit →HIIT
Levels, beginner, intermediate, advanced
See hiit →Mobility & Flexibility
Levels, beginner, intermediate, advanced
See mobility & flexibility →Pilates
Levels, beginner, intermediate, advanced, teacher training
See pilates →Strength & Conditioning
Levels, novice, intermediate, advanced, competitive
See strength & conditioning →Built for teachers, not for IT
C3NTR is meant to feel like writing in a notebook, not configuring software. No training course, no setup project.
Write directly in the app
Like a notepad. New articles are drafts until you publish, so nothing goes live by mistake.
Mobile-first authoring
Edit on the phone between classes or on the way home. The same library, the same edit screen.
A working library in under an hour
Import the starter template in a few taps. Edit anything that doesn't fit. Publish when ready.
What C3NTR is, and what it isn't
A library your school owns
Another booking or billing system
Built for how schools actually teach
A generic course builder
Calm, focused reading for students
A feed competing for attention
UK GDPR · DPA 2018
UK GDPR compliant. Hosted in the EU (London).
C3NTR is built around UK data protection law from the ground up. Your school's data sits in the EU on Google Cloud London, the same region we manage from.
UK GDPR + Data Protection Act 2018
Built around UK GDPR Article 6 lawful bases. Subject access requests answered within one calendar month.
Hosted in the EU (London)
Your school's data sits on Google Cloud in the europe-west2 (London) region. No transfer outside the UK or EEA for core operation.
Encrypted in transit
All data is TLS encrypted. Access restricted to personnel with a clear business need.
Account deletion on request
Permanent deletion of personal data and content via in-app or written request.
Start free. Move up when you outgrow it.
School
£39/mo
£32/mo billed annually
Up to 150 students
Push notifications. 1 GB media storage.
Choose SchoolAcademy
£69/mo
£57/mo billed annually
Unlimited students
Multi-instructor publishing. Engagement analytics. 5 GB media storage.
Choose AcademyDon't see your fitness discipline?
Tell us what you teach and we'll add a starter template. In the meantime, the app already works for any structured curriculum. Your library starts blank in a few minutes.
Ready to give your fitness students a knowledge home?
Free for the first 30 students. No credit card. A working library in under an hour.
Start free for your school