A single-file offline app (HTML) that builds a monthly profit and loss statement from the figures you type: revenue, cost of goods sold and operating expenses for 12 months, with an optional budget. It shows gross profit, net profit, margins, a break-even estimate and a revenue and profit chart for the period you choose, and compares it with the previous period of equal length. The interface runs in English, Italian, Spanish, French and German. One ZIP with the app, five PDF guides, text guides and fictional demo and blank JSON files. One-time digital download. Not accounting or tax software.

The problem it solves

Monthly totals are easy to collect but hard to read: it is not obvious how much you really keep after costs, how this quarter compares with the last, or how much you need to sell to cover fixed costs.

Who it is for

Freelancers, small shops, makers and side-business owners who already know their monthly totals and want a private, offline way to see profit, margins and break-even, without a spreadsheet or an account.

What you get

• Type actual amounts for up to 40 lines across 12 months: revenue, cost of goods sold and operating expenses, with names you choose
• Mark each operating expense as fixed or variable, so the break-even estimate (fixed operating expenses divided by the contribution margin) reflects your cost structure
• Pick a period: full year, a quarter, a half year or custom months, and see revenue, gross and net profit, gross and net margin and operating expenses
• Compare net profit with the previous period of equal length, and set a monthly budget to read budget vs actual with the variance
• A chart of revenue and net profit by month and a line-by-line statement with percentage of revenue
• Private by design: no account, no bank connection, no cloud, no subscription; JSON backup and restore, CSV export and a print button for the statement

How you use it

1. Extract the ZIP into a permanent folder and open OPEN-MAXORI.html in a desktop browser with JavaScript and local storage enabled. Nothing to install.
2. Choose your language, then try a DEMO JSON from Setup & backup > Restore backup (or the Load fictional example button) to see a full year.
3. Download a backup, then restore the BLANK file for your language, or use Start with an empty statement, and set the year, first month of the year and currency.
4. Under Lines, rename, add or remove your lines and mark expenses fixed or variable. Under Monthly figures, type actual amounts, and switch to Budget if you want a plan.
5. Open Overview and Statement, pick a period and read profit, margins, break-even, the comparison with the previous period and budget vs actual. Download a dated JSON backup regularly.

Questions