Invos

Invos.dev is a simple and practical web app built for people who need to create professional invoices quickly and keep their billing work organized in one place. Many free invoice tools only let users create a single invoice, download a PDF, and leave without saving any record. Invos improves that workflow by giving users both options: they can create a free invoice instantly, or sign in and manage invoices through a clean dashboard.

The main purpose of Invos is to make invoicing easier for freelancers, agencies, consultants, contractors, creators, small businesses, developers, designers, and service based teams. Users can create polished invoices online, add client and item details, generate totals, and download professional PDF invoices. It is designed for people who want a fast invoice generator without complicated accounting software.

What makes Invos more useful is the dashboard experience. After signing in, users can manage invoices, customers, receipts, billing history, and PDF downloads from one organized workspace. Customer records are created from invoice details, which helps users keep track of who they billed, when an invoice was created, how much it was for, and whether they need to edit, delete, or download it again later. This is especially helpful for freelancers and small teams that send invoices regularly and do not want to lose billing records in random PDF files or email threads.

Invos is not just an invoice generator. It also includes a large collection of free calculators that support business, finance, tax, payroll, pricing, planning, health, math, construction, conversion, science, statistics, and everyday life use cases. The calculators section includes 204 free calculators, making Invos useful beyond invoicing. Users can calculate numbers before creating an invoice, compare pricing, estimate taxes, plan payments, or solve everyday calculations without leaving the website.

Some of the most useful calculators for business and billing workflows include the VAT Calculator, Discount Calculator, Paycheck Calculator, Mileage Reimbursement Calculator, Sales Tax Calculator, Salary Calculator, Mortgage Calculator, Loan Calculator, Stock Calculator, ROI Calculator, APR Calculator, Budget Calculator, Commission Calculator, and many more. These tools help users prepare cleaner estimates, understand totals, calculate deductions, apply tax rules, and make better financial decisions.

The VAT Calculator is useful for freelancers, agencies, and small businesses that need to add or remove VAT from an amount before sending an invoice. Users can enter the amount, set the VAT rate, and choose whether the amount already includes VAT or whether VAT should be added on top. This makes it easier to show tax clearly on invoices and avoid confusion with clients.

The Discount Calculator helps users calculate final selling prices after percentage or fixed discounts. It supports simple calculations as well as item level calculations for multiple products or services. Users can also compare tax before or after discount, which is useful for sellers, service businesses, and anyone preparing discounted invoice totals.

The Paycheck Calculator helps users estimate net pay from gross income, pay frequency, tax rates, deductions, bonuses, overtime, commissions, and withholding. It is useful for payroll planning, salary comparisons, budgeting, and understanding take home income before making financial decisions.

The Mileage Reimbursement Calculator is another practical tool for people who bill or track work related travel.