Clairos

Focused apps for real work and everyday life.

Clairos makes useful software that solves the job in front of you without extra noise. Callie is for everyday math, and Kora is for real estate numbers.

Choose the app when you already know what you want to download. Choose a guide when you want to start with a calculation first.

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Everyday mathReal estate workFocused appsStore-backed details

Focused apps that stay clear, fast, and honest.

Callie

The all-in-one calculator for quick math, scientific checks, conversions, and everyday money tools.

Kora

The real estate calculator for mortgage payment, seller net sheet, rental analysis, cap rate, commission split, and affordability.

Apps

Two apps. Clear jobs.

Callie handles everyday math, conversions, date math, and quick money checks. Kora handles mortgage payment, seller net sheet, rental analysis, cap rate, commission split, and affordability math for real estate work.

Everyday calculator

Callie

The all-in-one calculator for quick math, scientific checks, conversions, and everyday money tools.

FreeScientific modeUnit conversionMoney tools

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Callie quick calculator view

Real estate calculator

Kora

The real estate calculator for mortgage payment, seller net sheet, rental analysis, cap rate, commission split, and affordability.

Free mobile appMortgage paymentSeller net sheetBranded exports

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Kora mortgage calculator screen

Why Clairos apps work

Focused apps that stay useful.

The standard is simple: focused enough to stay simple, clear about privacy and pricing, and useful enough to keep installed.

Focused enough to stay simple

Each app solves a clear job without trying to be everything at once.

Clear about privacy and pricing

The stores document the current details, and the site stays aligned with that truth.

Useful enough to keep installed

The apps stay on your phone because they help with the next question too.

Guides

Start with the task you need to solve.

Choose a guide when you know the calculation you need first. Choose an app when you already know what you want to download.

Mortgage calculator

Estimate mortgage payment, escrow, HOA, PMI, and cash to close with Kora.

Seller net sheet calculator

Estimate seller proceeds, closing costs, commissions, and payoffs with Kora.

Unit converter app

Convert length, weight, temperature, volume, and more in Callie.

Scientific calculator app

Use scientific mode, quick math, and everyday calculator tools in one app with Callie.

Browse all guides

Need something else?

Start with the page that matches the job.

Choose the app, the guide, the use case, or the contact page based on what you need next.

See Callie and Kora side by side when you already know you want a product page.

Learn more Guides

Start with the exact calculation you need when the task comes first.

Learn more Use cases

See which app fits everyday math, shopping, schoolwork, or real estate work.

Learn more Contact

Get the app or get in touch when you need help or a real human answer.

Next step

Start with the task or the app.

See the apps if you already know what you want. Browse the guides if the calculation comes first.

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