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Today, recently added, and what to read next.
Curriculum, terminology and culture in one calm place. Grade-aware, always to hand.
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Today, recently added, and what to read next.
Explore
Every article, term, video and audio, by tag.
Reading view
Clean text, tap a term to define it inline.
Glossary
Your terminology, grade-aware and searchable.
Search
Keyword and semantic, all on-device.
Today
Announcements and what is on this week.
School theme
Your colour, logo and welcome message.
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.
Ten categories. Eighty starter templates. Open one in the app and shape it to your school.
Curriculum, etiquette and progressions in one library.
Vocabulary, technique and the rhythm of the studio.
Technique, theory and the long arc of practice.
Breath, asana and the language of the tradition.
Skills, conditioning and the safety of progression.
Programming, terminology and the why beneath the work.
Craft, vocabulary and the work behind the stage.
Curriculum, glossary and resources for every stage.
Foundations, philosophy and a calm place to study.
Technique, materials and the habits of a maker.
C3NTR is meant to feel like writing in a notebook, not configuring software. No training course, no setup project.
Type a few notes, drop in a photo or a clip, and you have a lesson. It reads beautifully without you styling a thing.
Connect your Claude or ChatGPT key and let it polish a paragraph or finish a thought. Optional, on by request, your key stays on your phone.
Tag it once and students find it from anywhere. Search reaches every article, term and clip on the device.
Bring your existing notes in, and keep your booking, billing and student records exactly where they are. See all integrations →
Smart import reads headings and turns them into draft articles. You review before anything publishes.
Notion exports, Obsidian notes, Bear, plain .md files. Paste or import.
Open .c3t.md format. Schools can share templates with each other without us in the middle.
C3NTR is built around UK data protection law from the ground up. Show your governors and parents exactly where student data lives.
Subject access requests answered within one calendar month. Built around UK GDPR Article 6 lawful bases.
Your school's data sits on Google Cloud (europe-west2). No transfer outside UK/EEA for core operation.
All data is TLS encrypted. Access restricted to personnel with a clear business need.
Permanent deletion of personal data and content via in-app or written request.
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 powerful search across all content. Articles, terms, videos and audio in one overlay. Keyword and semantic matching, grade filtering, recents and on-device suggestions. Nothing leaves the phone.
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.
80 sub-discipline templates across 10 categories: martial arts, dance, music, yoga, gymnastics, fitness, performing arts, academic, wellness, and creative. Starting points, not limits. C3NTR fits any school, with or without grades.
Embed a technique, link a resource, or upload a session recording. Drop in a pronunciation, breath cue, or short demo. Text, terminology, video, and audio 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 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.
Plans are per school and billed through Stripe. Pay monthly, or annually with two months free. There's no minimum contract and you can cancel at any time.
Yes. You can move between plans from the web portal whenever you need to.
After cancellation, your data is retained for 30 days and then permanently deleted. There's no minimum contract.
One payment, and your plan is yours for as long as we run C3NTR — including all updates to that plan. Future add-ons and new tiers aren't included, and storage limits still apply. You can add storage at any time.
Until 31 August 2026. After that, lifetime closes and plans return to monthly and annual billing only.
Yes, while the offer is open. Pay the lifetime price and we'll credit the unused part of your current subscription. Once the offer closes, there's no path to lifetime.
While the offer is open, you can move up by paying the difference. After it closes, lifetime plans stay as they are — you can still add storage whenever you need it.
Lifetime comes with a 30-day money-back guarantee. If C3NTR isn't right for your school, write to support@c3ntr.app within 30 days for a full refund.
See what we've shipped, what's in the works, and what's coming next, then vote to shape the direction yourself.
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.
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.