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We're always working on this app. Every update brings enhancements, bug fixes and sometimes new features. If something feels off or you'd like to see something added, feel free to leave feedback - it helps a lot.
Everyday money maths: percentage, discount, VAT, mortgage, savings. Offline.
Six calculators for the money questions that come up in ordinary life, answered on your device in seconds. WHAT IT DOES • Percentage — of, plus, minus, and the difference between two numbers • Discount — what you pay and what you save • VAT — add or remove tax • Compound interest — what savings become over time, year by year • Savings goal — how much to put aside to get there • Mortgage — monthly payment, total interest, total cost BUILT TO STAY OUT OF YOUR WAY Type a number, read the answer. No sign-up, no account, no ads, and nothing to dismiss before you can use it. Every calculator gives a complete answer to everyone. YOUR FIGURES STAY ON YOUR PHONE Money Tools does its arithmetic on the device and sends nothing anywhere. We add no analytics, no crash reporter and no server of our own. (Google's billing library, which is what makes the Pro upgrade possible, includes Google's own telemetry about itself — it never sees what you calculate.) Saved calculations are excluded from cloud backup and from device-to-device transfer on purpose: your mortgage figures stay on the phone you typed them into. DETAILS THAT MATTER IN A MONEY APP • Amounts and rates are formatted for your country's conventions • Works in the currency you choose, or the one your device implies • Dark theme, and every screen readable at large accessibility font sizes • English and Portuguese, switchable inside the app • Saved calculations reopen exactly as you left them ABOUT TAX RATES The VAT rate is filled in automatically where a standard European rate is known for your country, and left blank otherwise. Sales tax that varies by state, province or category — as in the United States, Canada and India — is not built in; enter the rate that applies to you and the calculator does the rest. MONEY TOOLS PRO A one-time purchase, no subscription: compare two mortgage scenarios side by side, see compound growth as a chart, break down where savings growth comes from, and keep unlimited history. Every calculator stays free to use in full — Pro adds depth, not access. PLEASE NOTE Money Tools is a calculator, not financial, tax or investment advice. Results are estimates based only on what you enter and exclude fees, insurance, taxes and product terms unless you enter them. Check any figure with your bank, tax authority or a qualified adviser before acting on it.