Observed arrival · 2026-09-06

Raindex Measures Rainfall by the Kilometre

raindex.app Observed source

Editorial interest 82/100 Selection signal · not a rating of the site

An iPhone rainfall tracker that estimates what fell at a saved US location using NOAA radar and gauge data on a 1 km grid.

Landing page captured for the 2026-09-06 issue.

Field notes

The service assigns rainfall to the 1 km cell containing a saved location instead of using a town-wide average. Its source is NOAA’s Multi-Radar Multi-Sensor system, with gauge adjustment arriving about 97 minutes behind real time. The page describes a day-by-day record that begins when a place is added and preserves missing readings as missing rather than converting them to zero. Each reading carries a status such as gauge-adjusted, radar-only, or provisional.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

One card from the complete issue

Paperwork for the Close-Up

294,223 arrived 1,000 judged 1000 catalogued Enter the complete issue