Cobalt Weather

Cobalt Weather

Personal station, live widgets

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Free
In-App Purchases

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Details

  • Released
  • Updated
  • August 15, 2026
  • September 21, 2026

Features

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About

Cobalt is a fast, uncluttered weather app that takes its color from the conditions and puts your own backyard readings right next to the forecast. Open it on a clear afternoon and it is warm and bright. Open it in a thunderstorm and the whole interface shifts. Every screen, chart, and detail sheet is colored by the weather it is describing, in both light and dark mode. FORECASTS • Hour-by-hour and 10-day forecasts, with separate daytime and overnight conditions for every day • Minute-by-minute rain for the next hour where available, so you know when it starts and when it stops • Interactive charts for precipitation, temperature, wind, and atmosphere • Feels like, humidity, dew point, UV index, visibility, cloud cover, pressure, and air quality • Sunrise, sunset, daylight remaining, moonrise, moonset, and moon phase • Tap any day or any hour for a full detail sheet, colored by that day's own forecast SEVERE WEATHER • Official watches, warnings, and advisories, pinned above the forecast • Color-coded by severity, with the exact window each one covers YOUR OWN STATION • Connect an Ambient Weather, Ecowitt, Davis, or Tempest station in a couple of minutes • Live temperature, humidity, wind speed, gusts, direction, rain, and pressure • Rain totals by rate, day, week, month, year, and current event • Station screens take their color from your own sensors, not the regional forecast MADE TO BE YOURS • Save your places and your station, and switch between them with a tap • Jump to your current location instantly • Hide any reading or card you don't need on the forecast page • A forecast widget on your home screen that stays current without opening the app • Pick your own units • Follow your system theme or lock it to light or dark COBALT PLUS Cobalt is free, with no account and no sign-in. Cobalt Plus is an optional subscription that adds: • Alerts on your phone: severe weather at up to three saved places, rain about to start, a daily briefing, and limits you set on your own station's readings • History: chart any reading from one saved place and up to two stations over the last day, week, month, or year • Your station compared with the forecast, reading by reading, and how the forecast has changed since yesterday • Up to 10 saved places and as many stations as you like (Free includes 2 places and 1 station) • Every extra sensor your station has, from extra temperature and humidity channels to soil, leaf, air quality, lightning, and leak sensors, each one renamable, like Kitchen or Garden • Station widgets and a full forecast widget, refreshed every 30 minutes PRIVACY Cobalt has no accounts and no sign-in. Your station credentials are stored in your device's Keychain and are sent only to fetch your own readings. Location is used only to show you the weather where you are. SOMETHING WRONG? Cobalt is made by one person, and I would genuinely rather hear about a problem than have you put up with it. Tell me what happened and what phone you're on: Nick@NickSaulino.com. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in Cobalt Weather

1.2.0

September 21, 2026

• New in Plus: alerts for severe weather, rain about to start, a daily briefing and limits you set on your own station's readings, for up to three saved places and two stations. Pick the briefing's hour, the severity you care about, and quiet hours that keep the night silent. • New in Plus: history for one saved place and up to two stations. Turn it on, then tap any reading to chart the last day, week, month or year, and slide along the chart to read any moment. Your station also sits next to the forecast, reading by reading, and the forecast card shows what changed since yesterday. • Hide any reading or card on the forecast page. • Sun & Moon shows whether the sun is rising, at its peak, setting or down, and its two columns stay in line when the moon phase name wraps. • Holding a place or a station now opens all of its settings in one card: rename, history, alerts, compare, refresh and delete. • Adding a place or a station is one card, step by step, with help finding your station's keys, every station found added at once, and a searched place shown to you before it is saved. • If Plus ends, places and stations past the Free limit are locked rather than deleted, and come back if you resubscribe within 90 days. Settings says what is paused and until when. • Fixed a deleted station coming back the next time you opened the app. • Fixed text, placeholders and the keyboard being hard to read when Cobalt's light or dark look differed from your phone's. • "Updated" times now roll up to hours and days instead of counting minutes for ever.

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Subscriptions & In-App Purchases

Monthly

More saved places, more stations, and better widgets.

$1.991 Month
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