Independent schools
One head instructor, an assistant or two, and a steady stream of new students. C3NTR puts your principles, combatives and weapon defence in one place.
For martial arts schools
A knowledge home for your Krav Maga gym.
Principles, scenarios and the situational drills that define the system.
→ See a quick tour
Free for up to 30 students
No credit card
UK GDPR · EU (London)
Works offline
Your school's principles deserve a home
Scenario responses vary by instructor. The principles get named without being read. Common-attack drills get explained again each module. C3NTR is a quiet place to write it all down once.
Who this is for
Schools with multiple instructors
Several instructors teaching across the week. C3NTR holds the shared standard so every class teaches the same answers.
Association-affiliated schools
IKMF, KMG, Krav Maga Worldwide or another lineage. Content locked by level keeps each module on the right ground.
Built for teachers, not for IT
Your head instructor opens the app, taps Edit, and writes the next scenario response in plain prose. The next class, the students read it before drilling.
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.
P-levels (P1–P5) and instructor grades
Content locked by level, in your school's progression
Tag any article with a minimum P-level or instructor grade. Beginners see the principles and basic combatives. Higher levels see weapon defence and complex scenarios. Instructors see everything.
A glossary of Krav Maga terminology
Krav Maga draws on Hebrew and English. C3NTR's glossary holds the terms in one place: your school's preferred terms, plain definitions, and the article each term appears in.
- Krav Maga
- Krav Maga, Hebrew for "contact combat." A modern self-defence system built for real situations rather than sport..
- The tap
- The tap, a clear signal to a training partner that means "stop now." A tap on the partner or the mat..
- Fighting stance
- The fighting stance, the ready position you move into once you recognise a threat..
- Combatives
- Combatives, the strikes of Krav Maga..
- 360 Defence
- The 360 defence, a family of outside blocks against wide..
- The pluck
- The pluck, the core action in defending a choke..
Stress test sessions, instructor courses, modules
C3NTR isn't only the library. Schedule stress tests, post when an instructor course is open, and let students see the term ahead. Announcements land on their Today tab and events sit on the calendar.
Start from our Krav Maga template
A working starter with 15 articles, 2 short videos, a 9-terms glossary across 5 tags (Getting Started, Foundations, Practice, Progression, Resources). Import in a few taps, then edit anything that doesn't fit your school. Every article, term and tag is yours from the moment you import.
See the Krav Maga template Template source:assets/templates/martial_arts/krav_maga.c3t.md
Inside the app
A look at how the library, articles and grade controls feel in your students' hands.
Plays well with what you already have
Bring your existing scenario notes and curriculum in with smart Word document import or paste Markdown directly from your archive.
Word documents
Smart import reads headings and turns them into draft articles. You review before anything publishes.
Markdown from any editor
Notion exports, Obsidian notes, Bear, plain .md files. Paste or import.
C3NTR templates
Open .c3t.md format. Schools can share templates with each other without us in the middle.
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.
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
Start free. Move up when you outgrow it.
Seed
Free forever
Up to 30 students
All core features. No credit card.
Start freeSchool
£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 AcademyStudent? Show this to your instructor.
If you train Krav Maga and you'd love a quiet library between sessions, share this page with your instructor. Most schools start on the free Seed plan in under five minutes.
Common questions
Can students only see their level's material?
Yes. Tag any article with a minimum P-level or instructor grade. Beginners see only the principles and basic combatives. Instructors see everything.
Is the IKMF or KMG curriculum reflected?
C3NTR is association neutral. Principles, common-attack defences and weapon defence are written so any major Krav Maga lineage can adapt without rewriting.
Can my school customise the Krav Maga template?
Yes. Every article, scenario and tag is editable. Add your association's curriculum, your scenarios and your house standards.
How long does it take to set up?
Most schools have a working library in under an hour. Import the starter template in a few taps, then edit anything that doesn't fit. Starting blank takes a little longer. Allow an hour or two to write your first ten articles. Students can use the app the day you publish.
Do I have to stop using my booking system?
No. C3NTR is a knowledge library for your curriculum, terminology and progressions. Booking, billing and scheduling stay with the tools you already use.
Is there a free plan?
Yes. Seed is free forever for up to 30 students, with no credit card required. Move up to School (£39/mo) or Academy (£69/mo) when you outgrow it.
Teach a different style? Tell us.
Whether it's a specific Krav Maga lineage we don't list, or another discipline entirely, drop us a line 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 Krav Maga 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