Underboss for Health & Fitness Businesses

Help your clients
feel better.
We’ll handle the rest.

Underboss automates client service tracking, billing, payment collection, and bookkeeping — so you can focus on your clients’ health, not on chasing invoices or reconciling sessions.

Start for free →See how it works
web.underboss.app
Today, Sep 10
Today · Sep 10 — 9 sessions scheduled
This Month
$11,260
↑ 6% vs last month
Outstanding
$890
3 invoices pending
Active Clients
31
2 new this month
Today’s Sessions
Marcus Webb
Personal training · 60 min
$110
Paid
Derek Osei
HIIT · 45 min · Session 4 of 10
$240
Paid
Priya Mehta
Strength · 60 min
$95
Reminder sent
Lisa Tanaka
Cardio · 45 min
$100
Paid

The health & fitness business problem

Your clients come to you to feel better. Billing shouldn’t be what stresses you out.

01
Package tracking is a moving target.
5-session packs, 10-session packages, monthly memberships, drop-ins — every client is on something different. Keeping track of where each client stands in their package, manually, is error-prone and time-consuming.
02
Chasing payment in a wellness context feels wrong.
You’re in a trusted, personal relationship with your clients. Sending a payment reminder — or worse, bringing it up before a session — undermines the environment you work hard to create.
03
More trainers means more complexity.
When you add staff, tracking who trained which client, at what rate, and who paid becomes nearly impossible without a real system. Spreadsheets break down fast when more than one person is delivering sessions.

Who it's for

Built for every kind of health
and wellness practitioner.

💪
Personal Trainers
🧘
Yoga & Pilates Instructors
🥗
Nutritionists & Dietitians
🧠
Therapists & Counselors
🌿
Wellness & Health Coaches

If you work with recurring clients on a session or package basis, Underboss was built for you.

What Underboss does for you

From the end of a session
to a clean set of books — automatically.

01
Session & package tracking
Log every session with the right rate — single sessions, package credits, group classes, or monthly memberships. Underboss tracks where every client stands in their package automatically.
02
Payments the way your clients pay
Cash, check, Venmo, or card — collected after the session and followed with an immediate invoice. Every payment is matched to the right client and session automatically.
03
Automated invoicing & reminders
Invoices go out after every session. Overdue balances get a follow-up from the system, not from you personally. The awkward conversation never has to happen.
04
Per-trainer tracking
When you have multiple trainers or practitioners, every session is tracked by who delivered it. Revenue by staff member, outstanding balances by client — the full picture at a glance.
05
Your whole team, one system
Add users as your practice grows — each trainer or practitioner gets their own login and session view. You see everything across the whole operation from one dashboard.
06
Books that are always ready
Real-time reconciliation means no end-of-month scramble. Tax time isn’t a project — your records are current, clean, and ready when you need them.

“I used to dread following up on unpaid sessions — it felt like it undermined everything I was trying to do with my clients. Underboss handles all of it now. I haven’t had to ask for payment once since I signed up.”

JL
Personal trainer & wellness coach, 28 active clients
Desktop & Mobile

One system. Every screen.

Underboss works on desktop and as a mobile app — so whether you’re between sessions at the gym or wrapping up for the day, your clients, billing, payments, and bookkeeping are always with you.

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Underboss
Dashboard
Sessions
Reports
Clients
Team
Money
Dashboard
Today · Sep 10
Today’s sessions
ClientSessionStatusAmount
Marcus WebbStrength · 60 minPaid$110
Derek OseiHIIT · 45 minPaid$100
Priya MehtaStrength · 60 minReminded$110
Lisa TanakaCardio · 45 minPaid$95
Underboss

Get Started

Try Underboss free for 30 days.

No credit card. No commitment. Just less admin.

Start your free trial →