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Up to 30 students
All core features. No credit card.
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16 starter templates
A knowledge home for martial arts schools.
Curriculum, etiquette and progressions in one library.
→ See a quick tour
Free for up to 30 students
UK GDPR · EU (London)
Works offline
Martial arts schools teach a body of knowledge that goes beyond technique, etiquette, history, the language of the dojo, and the principles that hold a practice together. Whether you teach a striking art like karate or Muay Thai, a grappling art like Brazilian Jiu-Jitsu or judo, or a traditional system like Wing Chun, the structure is the same: clear basics, steady progression, and a culture students can step into.
C3NTR helps you bring that structure into one place. Forms, terminology, belt syllabi, etiquette, history, short, focused articles that each student can read on their phone. New members understand how you train and why; senior students keep your style consistent as the school grows.
Find your discipline below, or browse all sixteen martial arts we have starter templates for.
16 martial arts disciplines
Each discipline has a starter template you can import in a few taps. Pick yours below.
Karate
Kyu and dan grades
See karate →Aikido
Kyu and dan grades
See aikido →Boxing
Novice, amateur, open and pro
See boxing →Capoeira
Cordas (cord colours, by lineage)
See capoeira →Escrima / Arnis
Instructor grades (lakan, guro) or your lineage's belts
See escrima / arnis →Hapkido
Gup and dan grades
See hapkido →Judo
Kyu and dan grades
See judo →Krav Maga
P-levels (P1–P5) and instructor grades
See krav maga →Wrestling
Youth, cadet, junior, senior and open
See wrestling →Wushu
Duan grades (1–9) or your school's progression
See wushu →Brazilian Jiu-Jitsu
Belts (white, blue, purple, brown, black) with stripes
See brazilian jiu-jitsu →Kickboxing
Levels, beginner, intermediate, advanced and competitive (or your gym's belt system)
See kickboxing →MMA
Amateur and professional tiers (or your gym's progression)
See mma →Muay Thai
Prajiad (armband) levels, amateur or pro tiers
See muay thai →Taekwondo
Gup and dan grades
See taekwondo →Wing Tsun
Student grades and technician levels
See wing tsun →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 martial arts 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 martial arts 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