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SPECIFICTION
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Harness

harnesscalendar.com

From $15/mo Free plan Web
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Spec score 8.0 #12 of 24 in Music Lesson Scheduling Software

What it is

Harness is a web-based calendar and studio management platform for private lesson instructors. Students can use shared scheduling or rescheduling links to choose available times, while families can view lessons, notes and invoices through a student portal. Instructors can customize rates, billing schedules and payers. Calendar tools include attendance and payment tracking, lesson events with assigned rates, drag-and-drop scheduling and availability annotations. Student profiles combine details, lesson history and payment balances, with automatic status tracking and intake forms. Finance features include income and expense tracking, invoices, Stripe-powered payments, profit and loss statements and Schedule C compliant exports. The free Hobby plan supports up to five students. Professional costs $15 a month and lists unlimited students, automated monthly billing, payment reminders, self-serve scheduling links and priority email support. A 30-day trial is available. The documentation says Harness is in active development.

Spec sheet

Purpose
Harness is a calendar and studio management platform for private lesson instructors.Read 4 Oct 2026 · harnesscalendar.com
Security
The privacy policy says each instructor's data is isolated at the database level and cannot be viewed by other platform users.Read 4 Oct 2026 · harnesscalendar.com
Support
The contact page lists technical support by email and says Harness aims to respond to all inquiries within 24 business hours.Read 4 Oct 2026 · harnesscalendar.com
Audience limit
The free Hobby plan supports up to 5 students; the Professional plan lists unlimited students.Read 4 Oct 2026 · harnesscalendar.com
Billing
Instructors can customize rates, billing schedules, and payers.Read 4 Oct 2026 · harnesscalendar.com
Calendar tools
Calendar features include attendance and payment tracking, lesson events with assigned rates, drag-and-drop scheduling, and availability annotations.Read 4 Oct 2026 · harnesscalendar.com
Data deletion
After account deletion, associated data is permanently deleted within 30 days, with backup copies potentially retained for up to an additional 30 days.Read 4 Oct 2026 · harnesscalendar.com
Development status
The documentation says Harness Calendar is in active development and new features are being added.Read 4 Oct 2026 · harnesscalendar.com
Finance tools
The product includes income and expense tracking, invoices, Stripe-powered payments, profit and loss statements, and Schedule C compliant exports.Read 4 Oct 2026 · harnesscalendar.com
Payment data
Harness says Stripe directly collects and stores full payment card details, while Harness may receive limited card information for records.Read 4 Oct 2026 · harnesscalendar.com
Payment integration
Online payments are powered by Stripe.Read 4 Oct 2026 · harnesscalendar.com
Scheduling
Students can use shared scheduling or rescheduling links to choose available times.Read 4 Oct 2026 · harnesscalendar.com
Student portal
Families can view lessons, notes, and invoices in a student portal.Read 4 Oct 2026 · harnesscalendar.com
Student records
Student profiles bring together student details, lesson history, and payment balance, with automatic status tracking and intake forms.Read 4 Oct 2026 · harnesscalendar.com

Plans and prices

Hobby Free Up to 5 students · Calendar, scheduling & attendance · Student profiles & family portal · Transaction ledger · Income and expense tracking · Reports and analytics · Create and email invoices Read 4 Oct 2026 · harnesscalendar.com
Professional $15 a month $15/month Unlimited students · Stripe payments · Automated monthly billing · Payment reminders · Self-serve scheduling links · Priority email support Read 4 Oct 2026 · harnesscalendar.com

Every Harness plan and price →

Strong points and limits

Strong points

  • Family portal for lessons, notes and invoices
  • Tracks attendance and payments
  • Includes invoicing and financial reports
  • Professional plan lists unlimited students

Limits

  • Free Hobby plan limited to five students
  • Professional costs $15 a month
  • Product is in active development

Who it suits

Harness suits private lesson instructors who need scheduling, student records and billing tools, as well as a portal for families. The Hobby plan's five-student cap may suit instructors with a small roster.

Verdict

Harness brings lesson scheduling, student records and financial tools into one platform. Consider the Hobby student cap and the paid plan's listed billing features when deciding which plan fits.

Where Specifiction places it

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