Core Personal Finance tools
These five tools cover the money decisions people ask about most — budgeting, creator project spend, an emergency buffer, and side-income ideas. Handy tax, savings, net-worth, school-fee, and mortgage tools sit nearby too; you'll find them further down the page.
Choose the money decision
Pick the closest workflow to get a short checklist and the most relevant tool order. The selection is saved only on this device.
Choose a finance path to get a short checklist and matching tool order.
Core Personal Finance apps
The five core tools for planning your money, kept up to date automatically.
Personal finance questions
How does the 50/30/20 budget rule work?
The 50/30/20 rule splits your take-home income into three parts: 50% for needs (rent, food, transport, utilities), 30% for wants (entertainment, dining out, subscriptions) and 20% for savings and debt repayment. The 50/30/20 Budget Calculator compares your actual spending against this split so you can see where to adjust. It is a starting framework, not a fixed rule — higher-rent cities often need a different balance.
Is my income and expense data private?
Yes. The Personal Finance tools are local-first: income, expenses, family obligations, project budgets and side-income assumptions stay in your browser and are not sent to a server unless you explicitly copy, download, save or submit something.
How much should my emergency fund be?
A common target is three to six months of essential expenses — rent, food, transport, utilities and minimum debt payments. The Security Emergency Fund tool sizes this from your essential costs, dependants and how stable your income is; single-income households and irregular earners generally aim for the higher end.
Are these tools free, and do they give financial advice?
All core Personal Finance tools are free and work on any phone or computer. They produce planning estimates only — not financial, credit, tax or investment advice, and not guaranteed outcomes. Confirm the figures and speak to a qualified adviser before making major money decisions.
Which currency do the tools use?
The tools are currency-neutral — enter amounts in your own local currency and every result stays in that currency. Nothing is converted, so the split, buffer or ranking reflects the money you actually earn and spend.