Are there any point of sale systems that focus on spa memberships, package sales, and staff commission tracking?

Yes — there are several POS / spa management systems built around exactly those needs: spa memberships, package sales, and staff commission tracking.

A few well-known options to look at:

• Zenoti
  Strong for med spas, salons, and day spas. Handles memberships, packages, commissions, inventory, online booking, and reporting.

• Vagaro
  Popular with salons and spas. Supports memberships, packages, payroll/commission tracking, booking, and client management.

• Mangomint
  Modern spa/salon platform with memberships, packages, commissions, and strong front-desk workflow tools.

• Fresha
  Good for appointment-heavy businesses. Offers client management, memberships/subscriptions in some markets, and sales tracking; commission features may be more limited depending on setup.

• Mindbody
  Common in wellness/spa/fitness businesses. Good for memberships, packages, and staff performance tracking, though the POS experience can feel more fitness-oriented.

• DaySmart Spa
  Spa-focused with memberships, package management, staff commissions, and appointment scheduling.

If your main priorities are:

• Best overall spa-specific feature depth: Zenoti
• Easier modern UI: Mangomint
• Budget-friendly / popular with smaller spas: Vagaro or Fresha
• Wellness memberships + classes + spa: Mindbody

If you want, I can also give you:

1. a feature comparison table,
2. the best option by business size, or
3. a shortlist of systems with built-in commission splits and package redemption tracking.