Independent schools
One guro, a small senior group, a steady stream of new students. C3NTR puts your angles, sinawali and weapon work in one place.
For martial arts schools
A knowledge home for your escrima / arnis school.
Stick, blade, empty hand and the angles of attack.
→ See a quick tour
Free for up to 30 students
No credit card
UK GDPR · EU (London)
Works offline
Your school's lineage deserves a home
Angles of attack are numbered differently across lineages. Sinawali patterns get demonstrated once and forgotten. Tagalog and Spanish terms blur together. C3NTR is a quiet place to write it all down once.
Who this is for
Schools with multiple instructors
Several guros teaching across the week. C3NTR holds the shared standard so every class draws from the same library.
Lineage networks
You're carrying Doce Pares, Modern Arnis, Pekiti Tirsia or another tradition forward. Content locked by grade keeps each student safe at the right level.
Built for teachers, not for IT
Your guro opens the app, taps Edit, and writes the next sinawali pattern in plain prose. The next class, the seniors drill it from the page.
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.
Instructor grades (lakan, guro) or your lineage's belts
Content locked by grade, in your school's progression
Tag any article with a minimum grade. New students see the angles and single-stick drills. Senior students see espada y daga and disarming. Instructors see everything.
A glossary in Tagalog, Spanish and English
Filipino martial arts braid Tagalog, Spanish and English. C3NTR's glossary holds the terms in one place: each language, your school's translation, and the article each term appears in.
- Escrima, Arnis, and Kali
- The three common names for Filipino martial arts, the indigenous weapon-based fighting arts of the Philippines..
- Baston
- The stick, the primary training weapon of Filipino martial arts..
- Angles of attack
- The numbered angles along which every strike travels..
- Triangle footwork
- The footwork pattern at the heart of Filipino movement..
- Abaniko
- The "fan" strike, a fast..
- Sinawali
- The weaving double-stick patterns of Filipino martial arts..
Seminars, instructor tests, school closures
C3NTR isn't only the library. Schedule a master's seminar, post when an instructor test is coming up, and let students see the week ahead. Announcements land on their Today tab and events sit on the calendar.
Start from our Escrima / Arnis 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 Escrima / Arnis template Template source:assets/templates/martial_arts/escrima.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 angle drills and Tagalog terminology 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 guro.
If you train Filipino martial arts and you'd love a quiet library between sessions, share this page with your guro. Most schools start on the free Seed plan in under five minutes.
Common questions
Can students only see their grade's material?
Yes. Tag any article with a minimum grade or instructor level. Beginners see only the angles and basic stick drills. Guros see everything.
Does it cover stick, blade and empty hand?
Yes. The starter teaches the angles and footwork that translate across all three, with notes on what changes when a blade is in the hand.
Can my school customise the escrima template?
Yes. Every article, drill and tag is editable. Add your lineage's numbering, your drills and your weapon focus.
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 escrima / arnis 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 escrima / arnis 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