intajInvoices your clients understand, in their language.
Fill it in your language, send it in your client’s. Free, no sign-up, and everything stays on your device.
Start free. Grow when you need to.
Fewer products. Better ones.
We'd rather ship five excellent tools than fifty average ones. Each one solves one job completely.
Freelancer OS
Clients, projects, time, invoices and expenses, connected. Know what every project really pays per hour. Available in 9 languages.
Personal Finance Dashboard
Budget, spending, savings goals and net worth in one spreadsheet. No subscriptions, no bank logins. Available in 9 languages.
Studio OS
Ideas, content calendar, sponsorships and income for creators on every platform. Available in 9 languages.
Start with something free.
Small, useful tools from the same studio. No card needed.
Invoice generator
Make an invoice or quote and download the PDF. No sign-up; it stays on your device.
Make an invoice →
Income and expense book
Write down what came in and what went out, see your profit per month. Free, no sign-up, stays on your device. A record of your money, not tax advice.
Keep simple books
Invoice Tracker Lite
A free Notion template: who owes you, how much, and since when. Overdue invoices turn red on their own.
Available in 9 languages.
Get the template →
Hourly rate calculator
The minimum rate you need, from your income goal, costs, time off and billable hours.
Open the calculator →
50/30/20 budget calculator
See how your income splits into needs, wants and savings, and how your real spending compares.
Open the calculator →
More free tools: Sponsorship rate calculator · Platform fee calculator · VAT calculator · Late payment interest calculator · Debt payoff calculator · Invoice template (PDF)
Invoice Tracker Lite is also listed on the Notion Marketplace →
Find us on
Our tools are listed on these stores and directories.
GumroadAll our products in one store
Notion MarketplaceOur free Notion templates
Microsoft StoreIntaj Invoice app for Windows
Edge Add-onsIntaj Invoice add-on for Edge on a computer
Firefox Add-onsIntaj Invoice add-on for Firefox on a computer
G2Intaj Invoice profile
CapterraIntaj Invoice profile
GetAppIntaj Invoice profile
FazierIntaj Invoice profile
Names and logos belong to their owners. Being listed there does not mean they endorse us.
Made to be used, not just admired.
Connected, not decorative
Our templates are systems. Data flows between parts, so numbers update themselves instead of waiting for you.
Honest about limits
We tell you what a product needs before you buy. Freelancer OS, for example, works fully on Notion's free plan.
Facts you can check
No account for the invoice maker, and it keeps working offline once loaded. Its tax data is open, with sources, in a free dataset. Every paid product has a 14-day refund. Updated 20 October 2026.