70+ calculators · works offline

Every money decision.
One clean app.

Loans, APR, mortgages, retirement, bonds, stocks, tips. CashMagnet does the maths instantly — even with no signal.

Free · Android 8+
No account, no sign-up
100% offline No data collected Free
Loan calculator OFFLINE
Amount€ 25,000
€
Interest rate4.90 %
%
Term5 years
y
Monthly payment
€ 470.35
€ 3,221Interest
€ 28,221Total
4.9%APR
70+calculators built in
0accounts required
0 KBof your data sent
8+Android versions

Everything you'd open a spreadsheet for.

Eight families of calculators, each one built for a real decision — not a demo.

Loans & credit

Monthly payments, total cost, amortisation, early repayment and what-if comparisons.

APR & real cost

The number lenders don't lead with — fees, insurance and rate, folded into one figure.

Mortgages

Affordability, down payment, term length and the impact of one extra payment a year.

Retirement

How much to save now, how long the pot lasts, and what inflation quietly takes.

Bonds & yield

Yield to maturity, coupons, accrued interest and price sensitivity to rates.

Stocks & returns

Compound growth, dividends, P/E, and the difference between nominal and real return.

Savings & interest

Simple vs compound, regular deposits, effective annual rate, taxes on interest.

TVM, tips & more

Time value of money, tipping, VAT, currency conversion with live rates when online.

Privacy by design

Your numbers never leave your phone.

CashMagnet has no account system and no backend that stores your inputs. Everything you type stays in the app's private storage on your device.

No sign-up, no email, no profile.
Calculations run on-device — works in airplane mode.
Delete everything by uninstalling the app or clearing its storage.

Data safety at a glance

The same summary declared on Google Play.

Data collected by usNone
Data shared with third partiesAds only (Google AdMob)
Account requiredNo
Works offlineYes
Location, contacts, cameraNot requested
Data deletionUninstall the app

Read the full privacy policy →

Questions, answered.

Is CashMagnet really free?

Yes. The app is free and supported by ads served by Google AdMob. There is no subscription, no paywalled calculator and no account to create.

Does it work without internet?

Every calculation runs on your device. Only two things optionally use the network: ads, and live currency exchange rates. Without a connection the app keeps working normally, with the last known rates.

Do you see the amounts I enter?

No. Your inputs are stored in the app's private database on your phone. We have no server that receives them, and the app contains no analytics that would send them.

Which Android versions are supported?

Android 8.0 and newer. The app is lightweight and runs on low-end devices.

How do I delete my data?

Uninstall CashMagnet, or go to Android Settings → Apps → CashMagnet → Storage → Clear data. Since nothing is stored on our side, there is nothing else to delete.

Is this financial advice?

No. CashMagnet is a calculator: it applies the formulas you give it. It does not recommend products, and it is not a substitute for advice from a licensed professional.

Do the maths once. Decide better.

Download CashMagnet and keep every calculator you need in your pocket — even where the signal isn't.