Skip to main content
iOS App

Atmos Weather

Multi-source weather app with GPU-rendered animations

A native iOS weather app that aggregates seven weather providers into one beautiful interface. Atmos Weather lets users pick a primary source and set fallbacks, so forecasts stay accurate no matter where they are. The standout feature: real-time Metal shader backgrounds that animate to match current conditions -- rain, snow, thunderstorms, fog -- all rendered on the GPU. Built entirely in Swift 6 and SwiftUI with Home Screen widgets, Live Activities, and full accessibility support.

Swift SwiftUI Metal WidgetKit Core Location
Atmos Weather
7
Weather Sources
6
Widget Styles
GPU
Rendered Visuals
iOS
Platform

The Challenge

Most weather apps rely on a single data source, which means forecasts can be unreliable depending on location and conditions. Users also expect a polished, visually engaging experience -- not just numbers on a screen. We needed to combine data from multiple providers with intelligent fallback, while delivering GPU-accelerated animations that respond to real-time weather without draining the battery.

  • Single-source weather data leads to inaccurate forecasts in many regions
  • GPU-powered animations need to run smoothly without draining battery
  • Widget and Live Activity data must stay fresh in the background
  • Privacy-first design with no tracking or data collection

Our Solution

We built a multi-provider architecture where users choose from seven sources (Open-Meteo, MET Norway, Apple WeatherKit, and more) with automatic failover. Custom Metal shaders render weather-responsive backgrounds at adaptive frame rates -- scaling down when the device is under thermal pressure. Background tasks keep widgets and notifications current, and all data stays on-device.

  • Seven integrated weather providers with smart automatic fallback
  • Custom Metal shaders for real-time weather-responsive animations
  • Adaptive frame rates based on device thermal state
  • Home Screen, Lock Screen widgets and Live Activities

Technology Stack

Swift

Swift

Language
React

React

SwiftUI

Key Features

7 Weather Sources

Choose a primary provider and set fallbacks. Open-Meteo, MET Norway, WeatherKit, OpenWeatherMap, AccuWeather, WeatherAPI, and Pirate Weather.

Metal Shader Backgrounds

GPU-accelerated animated backgrounds that shift in real time based on current weather -- rain, snow, thunderstorms, fog, and more.

Customizable Card Layout

Rearrange, show, or hide weather cards -- hourly forecast, air quality, UV index, wind, precipitation timeline, astronomy data.

Widgets & Live Activities

Six widget styles for Home and Lock Screen, plus Dynamic Island integration for at-a-glance weather updates.

Smart Notifications

Daily weather summaries and condition change alerts with customizable check intervals.

Privacy First

Location used only for weather. No tracking, no analytics, no data shared. API keys stored in Keychain, preferences stay on device.

Have a Similar Project in Mind?

We'll give you a realistic estimate -- timeline, budget, and team size -- before you commit to anything.

Get a Free Estimate