Observed arrival · 2026-10-17
Ratio turns a Mac calculator into a running note
Ratio is a macOS notepad calculator that shows answers as you type, with support for currencies, units, dates, and time zones.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Mac users doing quick calculations in notes
- Worth noticing
- Earlier results can be reused with references such as “L3”; the page also describes a Terminal command that runs calculations.
Field notes
Ratio treats a calculation as a line in a running note: enter an expression, and its answer appears beside it; later lines can refer back to earlier results with labels such as “L3.” The page also documents a Terminal command that returns the same result as the app, and describes hourly currency refreshes plus updates when the Mac wakes. Its examples range from VAT and loan payments to time-zone conversion and uptime allowances.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue