Independent gyms
One head coach, an assistant or two, a steady mat. C3NTR puts your striking, grappling and transitions in one place.
For martial arts schools
A knowledge home for your MMA gym.
Striking, grappling, transitions and the rules of the cage.
→ See a quick tour
Free for up to 30 students
No credit card
UK GDPR · EU (London)
Works offline
Your gym's craft deserves a home
Sprawl-and-brawl drills, ground-and-pound positions and submission setups get taught by different coaches on different nights. New members don't know the Unified Rules. C3NTR is a quiet place to write it all down once.
Who this is for
Gyms with multiple coaches
Several coaches teaching across the week. C3NTR holds the shared standard so every session draws from the same library.
Fight teams
You're prepping amateur and pro fighters. Content locked by level keeps newer members safe while fighters see the deeper game.
Built for teachers, not for IT
Your head coach opens the app, taps Edit, and writes the next transition breakdown in plain prose. The next session, fighters arrive knowing the chain.
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.
Amateur and professional tiers (or your gym's progression)
Content locked by level, in your gym's progression
Tag any article with a minimum level. New members see basics across striking, takedowns and clinch. Intermediate see transitions. Fighters see the full game.
A glossary of MMA terminology
MMA braids many languages and traditions. C3NTR's glossary holds the terms in one place: each phase, your gym's preferred names, and the article each term appears in.
- Hand wrap
- A long cotton or elastic wrap worn under training gloves to protect the knuckles, small bones of the hand, and the wrist. Around four metres long for adult hands.
- Sprawl
- The fundamental takedown defence, the legs slide back and the hips drop heavily as a partner attempts a shoot..
- Shoot
- A takedown attempt, the level change followed by a drive forward toward the partner's legs (single-leg or double-leg) or hips (body lock)..
- Guard
- A bottom ground position in which you control a partner who is on top by wrapping your legs around them..
- Transitions
- The movement between phases, striking to clinch..
- Gas tank
- Informal MMA term for cardiovascular and muscular endurance, the capacity to keep working at high intensity across multiple rounds..
Fight nights, padwork sessions, weigh-ins
C3NTR isn't only the library. Schedule the next fight night, post padwork sessions, and tell the gym when a weigh-in is coming up. Announcements land on their Today tab and events sit on the calendar.
Start from our MMA template
A working starter with 15 articles, 2 short videos, a 10-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 MMA template Template source:assets/templates/martial_arts/mma.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 transition drills and fight game-planning notes in with smart Word document import or paste Markdown directly from your gym's 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 AcademyFighter? Show this to your coach.
If you train MMA and you'd love a quiet library between sessions, share this page with your coach. Most gyms start on the free Seed plan in under five minutes.
Common questions
Can fighters only see their level's material?
Yes. Tag any article with a minimum level. New members see basics. Coaches always see everything, including the deeper game-planning.
Does it follow the Unified Rules?
Yes. The starter is written around the Unified Rules of MMA, with notes on local promotions and amateur variations where they differ.
Can my gym customise the MMA template?
Yes. Every article, drill and term is editable. Add your camp's preferred takedowns, your striking-to-grappling transitions and your house rules.
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.
Other martial arts disciplines
Teach a different style? Tell us.
Whether it's a specific MMA 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 MMA 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