loop4d: Shade & Sun Routes
Best hour to run, ride or hike
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Know the hour before you go. loop4d walks the sun across your whole route to find the shadiest time to run, ride or hike it. Compatible with Strava.
loop4d adds the fourth dimension to route planning: time.
You already know your route. loop4d tells you WHEN to run or ride it - the hours with the most shade on a hot summer day, or the most sun in winter - so you can plan around the heat, the glare and the wind.
Open a GPX file (or share one from Strava, komoot, Garmin Connect or Files), pick a date, and loop4d walks the sun across your whole route, point by point, to find your best time to go.
HOW IT WORKS
• Per-point sun & shade — for every part of your route, loop4d works out when the sun clears the ridges, trees and buildings around you.
• Best windows — clear "best in shade" and "best in sun" time slots for your chosen day.
• Weather & wind — temperature, rain, wind direction and twilight over your day, from a live forecast.
• Replay — scrub through the day and watch your route light up shade, sun, headwind and tailwind, segment by segment.
• Forward or reversed — flip the direction and loop4d re-picks the ideal start.
BUILT FOR RUNNERS & CYCLISTS
Marathon training in July? Find the shaded hours. Chasing winter sun on the bike? Find the bright ones. Planning a long climb? See where the wind hits.
PLAN WITHOUT AN ACCOUNT
Route analysis runs on your phone, with no sign-in. loop4d fetches public elevation, map and weather data to do the math.
YOUR MAP, YOUR HISTORY
Sign in with Apple and connect Strava to fill in a map of every country you've been active in, see your activities year by year, and earn awards for sun, heat, rain, wind and after-dark loops. Share any analysed route as a card.
Pick your route. We'll pick the hour.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Choosing a route now opens on your Strava activities, and Strava is the first tab. An activity recorded entirely after sunset now counts as 0% sun instead of staying unanalysed, so its country and your card count update. Also updated for the latest iOS.
The developer, Zero Story Points GmbH, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Location
- Contact Info
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Zero Story Points GmbH
- Size
- 9.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 ZeroStoryPoints GmbH
