Run your whole freelance business from one file.
Clients, projects, a live time tracker, line-item invoices and real profit — in one clean dashboard. No account, no subscription, no cloud. Open it in your browser and get to work.
Your business, scattered everywhere
If your clients live in your inbox, your projects in your head, and your invoices in three different apps, you never actually know where you stand.
You scroll through emails trying to remember which invoice got paid — and which is quietly 40 days late.
Projects blur together, deadlines sneak up, and nobody knows how many hours went into that “quick” job.
No single number tells you what you collected versus what you spent — so you can't price your next job properly.
Seven modules. One file. Zero setup.
This isn't a pretty spreadsheet. It's a working system that does the arithmetic most freelancers avoid.
Collected, outstanding, overdue, net profit and your real Effective $/hr — updated live.
A lightweight CRM: contacts, company, default rate, notes, and lifetime revenue per client.
Hourly or fixed. Task checklists, budget-vs-actual hours and progress bars.
A live timer plus manual entries. Bill tracked hours straight into an invoice.
Line items (qty × rate), tax, discount, partial payments, auto numbering and print / save-as-PDF.
Software, hardware, subcontractors. So “Net profit” is a real number, not a guess.
Your business details, logo, brand colour, currency, tax rate, invoice prefix and payment terms.
JSON backup and restore, plus CSV export of invoices, time and expenses. No lock-in.
Why people pay once instead of subscribing
Studio OS has no server, so it has no reason to charge you every month. That's the whole point.
| Tool | What it costs | Year 1 | Year 3 |
|---|---|---|---|
| Bonsai (Starter) | $25 / month | $300 | $900 |
| HoneyBook (Starter) | $36 / month | $432 | $1,296 |
| FreshBooks (Lite) | $19 / month | $228 | $684 |
| Studio OS | $39 once | $39 | $39 |
How it works
One HTML file. Double-click it. It runs in any modern browser, online or offline.
Drop in a client, a project, an invoice. The dashboard fills in instantly. Not sure? Hit “Demo” to load a worked example.
Track time, print invoices, export a backup or CSV any time. Your data never leaves your device.
Pricing
Pay once. Keep it forever. Most freelance tools cost $20–$40 every month — Studio OS doesn't.
Lite
- Invoice tracker with CSV export
- Runs offline, no account
- Unlimited invoices
- No projects or time tracking
- No expenses or profit analytics
Pro
- All 7 modules (dashboard, clients, projects, time, invoices, expenses, settings)
- Line-item invoices with tax, discount & partial payments
- Print / save invoice as PDF
- Live time tracker → one-click billing
- Effective $/hr, net profit & receivables aging
- Multi-currency, logo, invoice numbering
- JSON backup + CSV export
- 1 year of free updates
Studio
- Everything in Pro
- Use for up to 3 separate businesses / brands
- Commercial licence (bill clients under your company)
- Lifetime updates (no yearly renewal)
- Every future Studio OS add-on template, free
- Early access to new modules
A trimmed, free version. I'll also send one short email when a new product drops — no spam.
FAQ
No. It's a single file that runs in your browser, offline. There is nothing to sign up for.
In your browser's local storage on your own device. Nothing is uploaded anywhere. Use “Backup” regularly and keep the .json file somewhere safe.
Yes. Add line items with quantity and rate, set tax and an optional discount, record partial payments, then print or “Save as PDF”. Your logo and business details appear on it.
Yes — anywhere a modern browser runs. It's designed for desktop, and still usable on a phone.
Yes. Pro is $29 once (launch price) and includes a year of updates. Studio is $89 once and includes updates for life. No recurring charge either way.
Email within 30 days and you get a full refund, no questions asked.
Yes — it's plain HTML/CSS/JS in a single file. Developers can tweak anything; the Pro and Studio licences cover your own business use.