Step-by-step fractions for homework. Loan scenarios for the big decisions. RIZS Calc is a clean, native calculator for iPhone, iPad and Mac, with no ads and no tracking.
Download on theApp Store
Free to download.
Pro from $4.99 a year.
Four focused modes instead of a drawer full of tools. Each one does its job well and explains itself when it matters.
Type mixed numbers the way they look in your textbook. You get the answer reduced, as a mixed number or an improper fraction, with the decimal alongside. Tap Steps to see how it got there: common denominators, flipping and multiplying, simplifying.
Free includes 3 step-by-step explanations a day. Pro makes them unlimited.
Enter the amount, rate and term to get your monthly payment. Then add an extra monthly payment or a one-time lump sum, like a bonus or a tax refund, and compare the new payoff date and total interest side by side with the original loan.
Home loans can include the down payment, property tax, insurance, PMI and HOA fees. Car loans can include your trade-in, sales tax and fees.
The monthly payment is free. The payment schedule, home and car costs, and extra-payment scenarios are part of Pro.
Example: a $300,000 home loan at 6.5% for 30 years.
Done 6 years 11 months sooner, with $103,448 less interest.
Tap the equation to place the cursor, change what you need, and watch the result update as you type. No more clearing everything because of one wrong digit.
No banners, no pop-ups and no account to create. Your calculations stay on your device. Anonymous usage stats are off unless you turn them on, and never include the numbers you type. Read the privacy policy.
Designed for each screen, with full keyboard support on iPad and Mac. With Pro, your history syncs across your devices through your own iCloud account.
No weekly subscription and no paywall when you open the app. Pro is $4.99 a year or $9.99 once, and you can share it with your family.
RIZS Calc Pro adds six themes, each designed for light and dark mode, plus alternate app icons. Themes change the colors, never the layout.
Graphite
Light and dark
Ocean
Light and dark
Forest
Light and dark
Sunset
Light and dark
Paper
Always light
Midnight
Always dark
Choose one in Settings. The default icon is free; the others come with Pro.
Default
Graphite
Ocean
Midnight
PaperThe free version is a complete calculator, not a demo. Pro adds the deeper tools, and both Pro options work with Family Sharing.
$0
Everything you need for everyday math.
Choose either option. Both unlock the same features.
Prices are in US dollars; prices in other countries are set by the App Store and may differ. The free trial is for eligible new subscribers. The yearly plan renews automatically unless you cancel at least 24 hours before the end of the current period. You can cancel anytime in your Apple Account settings; here’s how.