Halcyon Weather
Calm, honest weather
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Plain-language weather: the day's forecast, severe alerts, and radar. Switch between your saved cities with a single tap.
Halcyon is a calm, honest weather app for iPhone, Apple Watch, and the Home Screen. It turns the forecast into one clear sentence — what's likely, what to plan around, what's safe to skip — instead of throwing dashboards at you.
— TODAY BRIEF
A short, plain-language summary of the next twelve hours: rain risk, UV, wind, and the comfort of being outside. Built from Apple Weather data, written like a friend who happens to read the chart.
— HEADS UP
A glanceable card surface with what actually matters: rain soon, strong wind, freeze risk, severe weather. Confidence is labelled when conditions are changing — Halcyon won't fake certainty.
— BEST WINDOWS
Halcyon looks ahead at the next twelve hours and recommends the best window to walk, commute, or plan an evening — no more guessing whether the rain hits before or after you leave.
— ON THE WATCH AND HOME SCREEN
A focused Apple Watch app and a Home Screen widget keep current conditions one glance away.
— FREE OR AD-FREE
Halcyon is free with two unobtrusive native ads on the forecast page. If you'd rather support the app without ads, Halcyon Ad-Free is $6.99 per year. Severe weather alerts stay free for everyone — Halcyon never paywalls danger.
Forecast data is provided by Apple Weather (WeatherKit). Halcyon is built by an independent developer and is not a substitute for official severe-weather alerts. Always cross-reference with your local emergency broadcast.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
See what changed overnight, keep rain timing on the Lock Screen when rain is on the way, and check U.S. air quality from AirNow.
Tap any city in your locations list to jump straight to it, and the list now marks the city you're viewing.
Also in this update:
• Tap a location in the widget to open that city in the app
• A short setup guide covering the widget, notifications, and Siri
• Severe weather alerts now request notification permission on a fresh install
• The widget refreshes when you add, remove, or reorder cities
• Temperature units now apply to the history and year-ago strips
• Metric units by default in the United Kingdom
• Radar time labels read correctly on 24-hour clocks
• VoiceOver reads each Best Window as a single card
• Temperatures near zero no longer display as "-0°"
The developer, BRENDAN ISAAC PRATT, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- BRENDAN ISAAC PRATT
- Size
- 6.8 MB
- Category
- Weather
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Halcyon Ad-Free $6.99
- Copyright
- © Everlight Digital LLC 2026