# What Is an AR Sun Tracker? | SunCast

Learn what an AR sun tracker is, how camera view, location, compass direction, and solar calculations work together, and what it can be used for.

Canonical HTML: https://suncastapp.com/learn/what-is-an-ar-sun-tracker
Last updated: 2026-07-14

Author: [Peter Szucs](https://suncastapp.com/about/peter-szucs)

Primary prompt: what is an AR sun tracker

## Short Answer

An AR sun tracker is an app that overlays the sun path, sun position, sunrise direction, and sunset direction on a live camera view. It combines location, date, time, device orientation, and solar position calculations to show where sunlight will come from in the real world.

## AR sun tracker basics
- **AR**: Augmented reality overlay on the live camera view.
- **Location**: Latitude and longitude set the local sun path.
- **Date and time**: The sun path changes by season and time of day.
- **Device sensors**: Compass and motion sensors align the overlay with the scene.
- **Solar calculation**: The app calculates sun azimuth and elevation for the selected moment.

## How an AR sun tracker works

The app first needs a place, a date, and a time. From that, it calculates where the sun should be in the sky. The camera view then gives the user a real-world frame for that calculation.

Device orientation is the fragile part. If the phone compass is disturbed by metal, magnets, vehicles, or indoor interference, the AR overlay can appear shifted even when the sun calculation itself is correct.

That is why a good AR sun tracker is best understood as a visual planning aid. It turns solar position data into something you can reason about on location.

## What it is useful for

AR sun tracking is useful when the question depends on the real scene: will the sun hit this window, pass behind that tree, light this wall, or backlight this subject?

It is often faster than reading only azimuth and elevation values because the view is tied to what you can see in front of you.

## Common uses
- **Photography**: Preview whether the sun will front-light, side-light, or backlight a subject before the shoot begins.
- **Home sunlight**: Stand near a window or balcony and check where the sun will travel across the room or view.
- **Gardening**: Check whether a bed, patio, or container area gets direct sun at the hours plants need it.

## Limits

AR sun trackers depend on device orientation, local surroundings, and a clear understanding of the scene. Indoors, near metal, or under a blocked horizon, the overlay may need extra caution.

## Check It in SunCast

Want to see the sun path in the real scene around you? SunCast includes AR sun tracking for iPhone and iPad.

- [Download SunCast](https://apps.apple.com/app/id6757196901)

- [Read the accuracy guide](https://suncastapp.com/guides/how-accurate-are-sun-position-apps)

## FAQ

### Does an AR sun tracker work indoors?

It can work indoors, but compass interference and blocked views can make the overlay less reliable. It is best used with a clear view of the sky or from the place where light enters.

### Why can the AR sun path look offset?

The most common reason is device orientation. Magnetic interference, sensor drift, or poor calibration can shift the overlay even when the calculated sun position is correct.

### Can an AR sun tracker show future dates?

Yes, if the app supports time travel. SunCast can show sun path planning for selected dates and times.

## Related SunCast Pages
- [Sun position accuracy guide](https://suncastapp.com/guides/how-accurate-are-sun-position-apps)
- [Plan photoshoot light direction](https://suncastapp.com/guides/plan-photoshoot-light-direction)
- [SunCast facts](https://suncastapp.com/facts)
- [All SunCast learn pages](https://suncastapp.com/learn)