# Ratio

> Ratio is a notepad calculator for macOS. You type calculations as plain text and the answer appears next to each line as you type. It handles live currencies and crypto, units, dates and time zones.

- Website: https://useratio.app/
- Download (free 7-day trial): https://useratio.app/download/Ratio.dmg
- Platform: macOS 13 Ventura or later
- Price: one-time purchase. 1 Mac $9.99, 2 Macs $14.99, 3 Macs $19.99. Updates included.
- Free trial: 7 days
- Languages: English, Romanian, German, French, Spanish, Italian (app and calculation syntax)
- Contact: hello@useratio.app

## Features

- 160+ live currencies plus major cryptocurrencies, refreshed every hour and when the Mac wakes up; works offline with the last downloaded rates
- 150+ units: length, temperature, data sizes and more ("5 km in mi", "GB to MB")
- Dates and time zones ("3pm in Tokyo", days until a deadline)
- Variables and line references: name a value ("price") or reuse a result with L3
- Lists, sum, average, median, fractions and small plots (sin(x))
- Live countdowns ("until 18:00", "until Christmas")
- iCloud sync of sheets across Macs (iCloud Drive › Ratio)
- 14 themes, Liquid Glass and frosted looks, light and dark mode
- Export as text or Markdown
- `ratio` command for Terminal, same engine as the app
- VAT and sales tax by country ("1000 + VAT", "1190 without VAT"), loans and interest (pmt, fv, pv, npv, irr, "10k at 4% for 5 years")
- Working days that skip weekends and public holidays ("1 mar + 10 working days")
- Equations ("solve x^2 - 5x + 6 = 0"), integrals and derivatives, exact answers like 2√2
- Physical constants (c, G), complex numbers, statistics and primes ("isprime(91)" → 7 × 13)
- Developer tools: hex and binary, u8…i64 integers, colours ("#FF8800 in rgb"), "chmod 755", aspect ratios, Unicode, uptime budgets ("99.9% uptime")

## Example input

```
dinner = 84 eur / 3
dinner in usd
5 km in mi
3pm in Tokyo
until Christmas
```

## FAQ

- Do I pay only once? Yes. One payment, updates included.
- What happens after the trial? Ratio asks for a license before calculating further. Sheets stay on the Mac and nothing is deleted.
- How do I move a license? In the app open Ratio Pro, click "Deactivate this Mac", then enter the same key on the new Mac.

## Pages

- [Home](https://useratio.app/): features, pricing, FAQ
- [Privacy](https://useratio.app/privacy.html): no accounts, no tracking, sheets stay on the Mac
- [Terms](https://useratio.app/terms.html): license and purchase terms