Independent teachers
One teacher, a teaching room, and a steady stream of students. C3NTR puts your chords, strumming, fingerpicking and repertoire in one place. No second tool, no spreadsheet.
For music schools
A knowledge home for your ukulele studio.
Chords, strumming, fingerpicking and the joy of ukulele
→ See a quick tour
Free for up to 30 students
No credit card
UK GDPR · EU (London)
Works offline
Your studio's teaching deserves a home
Strumming patterns get demonstrated but rarely written. Chord shapes vary slightly between teachers. The history, Hawaii to the global revival, sits in passing comments. C3NTR is a quiet place to write it all down once, in your studio's voice.
Who this is for
Studios with multiple teachers
Two or more teachers sharing students or rotating cover. C3NTR holds the shared standard so every lesson draws from the same library.
Studios with group classes
You teach groups of beginners and improvers. Content locked by level keeps newer players on chord shapes while advanced see fingerpicking.
Built for teachers, not for IT
Your teacher opens the app, taps Edit, and writes the next strumming pattern in plain prose. The next class, the players know the rhythm before they strum.
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.
Levels, beginner, intermediate, advanced
Content locked by grade, in your studio's progression
Tag any article with a minimum grade. Beginners see basic chords. Intermediate see strumming patterns. Advanced see fingerpicking and solo work. The same library, the right view per student.
A glossary in English (with Hawaiian terms) and English
Ukulele carries its own vocabulary. C3NTR's glossary holds the terms in one place: the English (with Hawaiian terms) names, your studio's translation, and the article each term appears in.
- Ukulele
- The ukulele is a small four-stringed instrument with nylon strings..
- G C E A
- G..
- Reentrant tuning
- Reentrant tuning is the ukulele's quirk where the top G string is tuned high rather than low, higher in pitch than the C string next to it..
- Chord
- A chord is several notes sounded together..
- Chord diagram
- A chord diagram is a small grid that shows where to put your fingers for a chord..
- C chord
- The C chord is most beginners' first chord..
Open mics, recitals, group classes
C3NTR isn't only the library. Schedule the next open mic, post when a group session is on, and let players see what's ahead. Announcements land on their Today tab and events sit on the calendar.
Start from our Ukulele template
A working starter with 15 articles, 2 short videos, a 11-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 Ukulele template Template source:assets/templates/music/ukulele.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 chord charts and tab notes in with smart Word document import or paste Markdown directly from your studio'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 AcademyStudent? Show this to your teacher.
If you learn ukulele and you'd love a quiet library you can return to between lessons, share this page with your teacher. Most studios 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. Beginners see only basics. Teachers and senior students always see everything.
Does it cover soprano, concert, tenor, baritone?
Yes. The starter is exam-board neutral. soprano, concert, tenor or your own progression can adapt the syllabus without rewriting.
Can my studio customise the ukulele template?
Yes. Every article, exercise and term is editable. Add your studio's repertoire, your favoured method books 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.
Other music disciplines
Teach a different style? Tell us.
Whether it's a specific ukulele 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 ukulele 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