How to install on your device
- Tap Install free app above.
- Tap Install in the pop-up.
- Open MasterCalc from your home screen or app drawer.
- Open this page in Safari.
- Tap the Share button (square with an arrow).
- Choose Add to Home Screen, then Add.
- Click Install free app, or the install icon in the address bar.
- Click Install.
- Launch it from the Start menu, Dock or desktop.
- Click Install free app.
- Confirm Install.
- Find MasterCalc in your launcher.
What's inside the app
- Income tax & salary: income tax (old vs new regime), CTC to in-hand salary, gratuity, GST, EPF and NPS.
- Loans & investments: EMI with monthly schedules, SIP, PPF, FD, retirement and more.
- Scientific calculator: a textbook-style scientific calculator with fractions, roots and memory, in a full-screen layout.
- Converters: 18 unit converters including Indian land units, and a live currency converter.
- Health, education & everyday: BMI, calories, CGPA, attendance, age, hours, percentages.
- Text & developer tools: word counter, QR code generator with UPI, JSON formatter and more.
Why a web app instead of a Play Store app?
MasterCalc is a progressive web app (PWA): the same fast pages you use on this website, installed with an icon and their own window. It is tiny (under 2 MB instead of 20–50 MB for a typical store app), asks for no special permissions, and updates itself whenever we add or improve a calculator.
Frequently asked questions
Is the MasterCalculator app free?
Yes. Every calculator, converter and tool is free, with no sign-up and no in-app purchases.
Does the app work without internet?
Yes. Once installed, the calculators and converters work offline. Only live data, such as currency exchange rates, needs a connection, and those show the last saved rates when you're offline.
Why don't I see an Install button?
On iPhone and iPad, install from Safari using Share, then Add to Home Screen. On other devices, use Chrome, Edge or Samsung Internet. Some in-app browsers (inside Instagram, Facebook or WhatsApp) can't install apps, so open the page in your normal browser first.
How do I uninstall it?
Remove it like any app: long-press the icon and choose Uninstall or Remove (Android/iPhone), or right-click it and choose Uninstall (Windows/Mac).