Zasder Weather

Weather data, made beautiful

Free · In-App Purchases

2.4: severe weather alerts by family with their own tones, the weather watches switched on, every screen arranged your way, and when the weather changed, not just what. Zasder Weather is a clean, fast app for personal weather stations on iPhone, Apple Watch and Mac. One purchase, every platform. It is bring-your-own backend: point it at your own server, and your station's data is yours, end to end. No ads, no tracking, no subscriptions. WORKS WITH YOUR STATION • AmbientWeather, Davis WeatherLink, WeatherFlow Tempest and Ecowitt from their clouds, an Ecowitt gateway posting straight to your server, or a WeatherLink Live read on your network for two-second freshness. • Direct radio capture: a $20 LilyGO board decodes AcuRite Atlas or Fine Offset, Ecowitt and Ambient sensors off the air. • AirGradient and Govee air monitors with CO2 and PM2.5, and soil probes on up to eight channels. • No server yet? The Mac app builds one on your Fly.io account in a minute, or run the backend in Docker. THE DASHBOARD • Live conditions, a 24-hour curve, today's highlights ranked against your own record, the moments the weather changed, and a strip that says hour by hour whether each source was healthy. • Arrange every screen: drag the cards into your order, hide what you do not need, and do the same for Charts. • A 7-day forecast with a written narrative, tap a day for its full text, and a scorecard of how right the forecast has been at your station. • Charts with a wind rose, station comparison, and drag to inspect. Explore any past day. Records in under a second. Insights, a year heatmap and a Science page of derived numbers. ALERTS THAT ARRIVE • Thresholds on any field, evaluated on your server, by push and email even when the app is closed. • Weather watches with no setup: lightning nearby with an all clear, frost, heat, a fast pressure drop, a gust front, the first frost, low batteries and a sensor gone quiet. • Severe weather from the National Weather Service, one family at a time: mute floods and keep tornadoes, with a warning that sounds different from a watch. • Storm summaries after the rain ends: total, peak rate, temperature drop and top gust, as a push, an email card or both. • Live Activities on your Lock Screen for the rain countdown, a storm in progress, lightning nearby, a wind ramp, a freeze night and a heat day, and they reach the Apple Watch Smart Stack. • Quiet hours, a morning report and an evening outlook at the minute you choose, sky notes before sunset, and report emails in the look you pick. SHARE IT • Read only links for family with one tap setup, and Sites to keep every server you are given beside your own. • Your station on the shared map at maps.zasder.com with the location rounded as much as you like. • Send your readings to Weather Underground, PWSweather, Windy, Weathercloud, CWOP, Met Office WOW, AWEKAS and OpenWeatherMap. • Story cards from your own record, a public dashboard page to embed on your site, NOAA-style reports, and Claude or ChatGPT connected to your server. ON YOUR WRIST AND HOME SCREEN • Apple Watch app with configurable complications and a Big complication per reading. • Home Screen and Lock Screen widgets, editable per widget, a dashboard widget the size of a page, and a widget that follows the station you choose. • Siri: ask for any reading, the forecast, rain totals or records, in your units. Your stations appear in Spotlight. YOUR DATA, YOUR RULES • Bring years of history from Weather Underground, a WeeWX database, or any CSV, and export every reading to CSV. • Calibrate any sensor with an offset or a scale, typed in your units. • Units: °F or °C, mph, km/h, knots, m/s or Beaufort, in or mm, inHg or hPa. Light, dark, or automatic. Dynamic Type throughout. • Settings backed up to iCloud, the server's database backed up from the app, one-tap server updates. The backend is open source (MIT): https://github.com/volneydouglas/zasder-weather-backend The app talks only to the server you configure. Optional tip jar via In-App Purchase, purely cosmetic; nothing is paywalled. Requires iOS 18.

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Choose your severe weather alerts, arrange your dashboard, and see when conditions change. • Choose your severe weather alerts: switch 11 alert families on or off, including tornadoes, thunderstorms, floods, and winter weather. Your choices apply across iPhone, widgets, Mac and Apple Watch connected to the same server. • Distinct alert tones: warnings use an urgent tone; watches and advisories use a softer one. Preview both in Alerts. Warnings are Time Sensitive on iPhone, subject to your notification settings. Warnings and watches bypass the app's quiet hours; advisories and statements wait until quiet hours end. • Weather watches: alerts for nearby lightning, frost, heat, fast pressure drops, the season's first frost, low batteries and silent sensors. Lightning alerts include an all clear 30 minutes after the last strike. On by default; manage the switch in Alerts, Rain and heat. • Arrange your dashboard and Charts: reorder or hide station cards, page sections and charts in Settings, Dashboard. Alerts and the forecast stay pinned at the top, and new cards appear automatically. • What changed: a timeline below rain history shows when rain started or stopped, wind shifted, pressure changed direction, skies cleared or clouded over, and the day's high and low occurred. Read it in your units, with a divider between days. • Bring your history with you: import a WeeWX database or CSV file in Settings, Data. Choose CSV column mappings, preview the import with a dry run, and rebuild history summaries if needed. • Calibrate sensors in your own units: set an offset or scale for each station in Settings, Stations. Corrections apply to new readings; existing history stays unchanged. • Nine new Backyard science readings: apparent temperature, humidex, vapour pressure deficit, cloud base, a clearly labelled single-reading PM2.5 air quality index, wind run, sunshine hours, chill hours and evapotranspiration. • Source health at a glance: see the past 24 hours under each station, including service responses, missing readings and server problems. Unmonitored hours are marked unknown. • Soil readings: view moisture and temperature from up to eight probe channels, with bars and plain-language labels beside each reading. • Put any station on your Home Screen: choose a station for each dashboard widget instead of following the primary station. • Your stations in Spotlight: search for a station by name and open it straight into the app. • Choose your report email appearance: dark, light, follow the sky at your station, or follow your device. Find Email under Quiet hours and reports. • Share with more weather networks: Met Office WOW, AWEKAS and OpenWeatherMap are now available under Sharing. • Test push delivery from the alert setup page without creating a threshold rule. • The sun dial now uses the station's time zone, so its marker and labels agree when you view a station elsewhere. • WeatherLink Live reconnects after an address change: the Mac bridge and server find the gateway by its ID. • Fixes improve threshold saving, push registration on a new phone, iCloud restores, and report email colors. Backups no longer trigger false disk alarms. Some new features require the free 2.4 server update in Settings. The app remains compatible with 2.3 servers.

The developer, Zasder LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Provider
    • Zasder LLC
    Size
    • 19.7 MB
    Category
    • Weather
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 14.0 or later.
    • Apple Watch
      Requires watchOS 10.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Buy me dinner USD 34.99
    • Buy me lunch USD 22.99
    • Buy me a latte USD 5.99
    • Buy me a coffee USD 0.99
    Copyright
    • © 2026