Your whole business, one app.
Cantus is client, calendar, invoicing and piano-care software built by a working piano technician. It runs your business, and it keeps working in the basements and church halls where the signal doesn’t reach.
$47.95 a month or $479.95 a year · unlimited clients · on the App Store


Built by a piano technician, not a software company. Davis Moore runs a full tuning and repair practice in Greenwood, South Carolina, and built Cantus to run it. Every feature exists because a real service call needed it, and when you email support, he’s the one who answers.
Everything a piano business needs. Nothing it doesn’t.

Scheduling & booking
Your calendar, an online booking page that respects your time off, and a route for the day.
Scheduling →
Clients & pianos
Every client and piano with its full history, condition graphs, and a recall list that knows who’s due.
Clients & pianos →
Invoicing & money
Itemized invoices clients pay online, income and expenses, and insights into how your business is doing.
Invoicing & money →Every client gets their own page.
One private link per client: no login and no app to download. They see their piano’s service history and condition, the photos and recordings from your visits, and any open invoice with a button to pay it. You look like the most organized technician they’ve ever hired.
- Service history and next due date
- Photos and audio recordings of their piano
- Humidity, temperature and tuning-stability graphs
- Open invoice with a pay button
- A gentle prompt to leave you a review

Used by piano technicians across the U.S. and abroad.
“Switching to Cantus saves me around $180 a month compared to what I was paying before, and it does more.”
“Cantus solved the problem of being unorganized in my piano tuning life. It’s incredibly user friendly, simple yet effective, and cost effective as well.”
Cantus is open. Start today.
Create your account, bring in your clients from Gazelle or a spreadsheet, and log your next visit this afternoon.