Built for freelancers
You do the work. Your books do themselves.
Income, expenses, invoices, and who owes you — all tracked automatically. Spend your time on client work, not bookkeeping.
Nothing to learn. Nothing to manage. Check in from the app, a text, or your DMs.
Your business right now
Revenue this month$8,500
Expenses$1,900
Net profit$6,600
↑ 18% vs last month
1 invoice overdue$3,000 outstanding
This isn't bookkeeping software
Most tools make you do the work.
This one does it for you.
MarathonBooks runs in the background — your numbers are just there when you need them.
For freelancers, this means:
- Know exactly how much you've earned this quarter
- See who owes you and how long it's been — instantly
- Know how much to set aside for taxes before it's too late
- Track every expense without thinking about it
- Send professional invoices in 10 seconds from anywhere
Sound familiar?
Chasing clients for late payments while trying to do actual work
No idea how much to set aside for taxes until April
Forgetting to track small expenses that add up
Multiple clients, multiple projects, no clear picture of profit
Spending weekends on bookkeeping instead of resting or side projects
Not sure if you're actually making enough to sustain this
MarathonBooks handles all of this automatically.
Real things freelancers can say
In the app, over text, or from your DMs.
“Send $3,000 invoice to Acme Corp for website redesign”
→ Invoice created and sent
“Did Acme pay yet?”
→ Payment status with details
“How much have I made this quarter?”
→ Quarterly income summary
“What are my expenses this month?”
→ Expense breakdown by category
“How much should I set aside for taxes?”
→ Estimated tax obligation
“Who owes me money?”
→ Outstanding invoices listed
What you get
Automatic tracking
Connect your bank. Everything is organized for you.
Works over text
Check your numbers or log something via SMS, WhatsApp, or DMs.
Invoicing built in
Send invoices and track payments. All in one place.
Stop worrying about your books.
They're already done.
Free to start. No credit card. Set up in minutes.
Get started free