The knowledge app for your school. Your curriculum, your terminology, your culture. At every student's grade level, on every phone.
AI features you control. Your data, your rules.
Free plan · No credit card required
Every school has a soul. C3NTR is built to hold it.
Your school is more than a venue. It's a community. C3NTR preserves your values, traditions, and the bond between every teacher and student.
Knowledge grows when it has structure. A clear library guides students through your system, one step at a time — and makes sure nothing is lost between sessions.
Every discipline has a culture. Store your school's philosophy, ethos, and history in a format as enduring as what you teach.
Adapts to your grade structure and terminology — belts, levels, grades, or whatever your school uses. At home in martial arts, dance, gymnastics, music, and any discipline where knowledge is passed systematically from teacher to student.
Content that respects the journey, unlocking only when the student is ready. Instructors and above always have full access.
A unified search overlay across articles, glossary, and explore content. Keyword and semantic matching, grade filtering, recents, and AI-related results — all processed on your device.
One identity for students and instructors across multiple academies. Switch between affiliated schools, each with its own branding, grade structure, and curriculum — seamlessly.
Instructors publish once; every student receives a push notification immediately. Target the whole school or a specific grade range.
73 sub-discipline templates across 8 categories — martial arts, dance, music, fitness, performing arts, academic, wellness, and creative. Pick a starting point and build from there.
Embed a technique, link a resource, or upload a session recording. Text, terminology, and video sit together in the same article — in the order you choose.
Notice which articles your students return to and which terms they look up most. Use what you learn to guide what you write next.
Articles are saved as your students read them. Available at the venue, on the road, wherever they train — no signal needed.
Write and publish articles, review your roster, and check engagement from any computer. The full content manager is there when you're not on your phone.
Import a Word document, Markdown file, or plain text. C3NTR reads the structure, suggests headings, and creates draft articles automatically. Your knowledge — not retyped.
Connect your own Claude or ChatGPT key. Generate a draft from notes or bullet points. You review before anything publishes — AI never does that for you. Your key stays on your device only.
Upload your logo, set your colours, rename every tab. Students open an app that feels like yours — shaped around your school's identity, not adapted from a template.
Heart any article or glossary term. Your favorites travel with you across devices — one tap to save, a dedicated tab to find them again.
Drag to reorder, bulk select, edit tags inline, move items between sections — all directly in your content tabs. No more jumping between screens to manage your curriculum.
Organise content with hierarchical tags instead of flat sections. One article can belong to multiple categories. Filter by any combination — your curriculum, your structure.
A dual-mode editor: rich text or Markdown, with a floating toolbar, slash commands, and auto-save. Write curriculum content at the speed of thought.
Your content belongs to you — export or delete it at any time.
Your school's curriculum, at your grade level, always with you.
Open the app and enter the phone number your instructor registered you with.
Show your instructor what's possible. Pick your discipline and copy a tailored message to send them — when they sign up, their school will be set up with a curriculum that matches what they teach.
This sends nothing automatically — it just copies a message for you to paste into WhatsApp, email, or however you reach your instructor.
We are clear about what we collect, why, and how you remove it.
All curriculum, student records, and school materials remain yours. Export or delete everything at any time from your dashboard.
Usage data is aggregated at school level — which articles are most read, not which student read them. Individual behaviour is never tracked.
Data is hosted in Google Cloud's European data centres, handled under UK GDPR and the Data Protection Act 2018.
C3NTR runs on subscriptions, not advertising. Your data is never sold, rented, or shared with any third party.
Semantic search and AI features are processed locally on the phone. Your curriculum is never sent to a cloud AI API — not ours, not anyone else's.
After cancellation, data is retained for 30 days then permanently deleted. No minimum contract.
C3NTR's search runs entirely on your device — your curriculum never leaves the phone. AI writing is optional: you bring your own API key, you choose what to send, and your key is stored only on your device. C3NTR never collects, stores, or forwards your content to AI providers.
Search across articles, glossary terms, and explore content by meaning or keyword. Grade filtering, recents, and related suggestions — all powered by a model bundled in the app. Nothing leaves your phone.
Connect your own Claude or ChatGPT key. Generate draft articles from notes or bullet points — you review before anything is published. When you use it, your content is sent directly to the provider you choose using your key. C3NTR never sees, stores, or intermediates this data.
C3NTR will never profile your students or share data with third parties. AI features are always opt-in — search works without any external service, and writing tools only connect when you explicitly choose to use them with your own key.
Perfect for last-minute reminders, training updates, and the day-to-day chatter of a school family. Keep it there.
Your curriculum deserves a permanent home. Build a searchable, grade-aware library your students can return to whenever they need it.
No credit card required. All core features available from day one.
See what we've shipped, what's in the works, and what's coming next — then vote to shape the direction yourself.
Start free with the app, or pick a paid plan now and build from there.
Seed plan is free forever for up to 30 students. Create your school space from your phone. No credit card.
Pick School or Academy, pay on Stripe, then download the app and sign in with the phone number you used at checkout.