# Sun Calculator — 3D Sun Shadow Simulator

> 3D sun and shadow simulator for location-based solar calculations. (iPhone/iPad app by Heng Jia Liang.)

- Source: https://appshunter.io/ios/app/sun-calculator/id1603759487 (this page in markdown: same URL + `.md`)
- Developer: [Heng Jia Liang](https://appshunter.io/developer/1532000635)
- Category: Entertainment, Utilities
- Price: $2.99
- Rating: 4.00/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 9 MB
- Languages: American English
- Released: 2022-01-07
- Data updated: 2026-08-18
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sun-calculator/id1603759487/reviews.md

## What is Sun Calculator?

Sun calculator show  interactive 3D scene that include sun movement and sunlight phases during the given day at the given location.

Sun calculator calculate sun azimuth, sun height and zenith angle on the go with time flow.
Also calculate dusk time, sunrise time, midday or noon time, sunset time and dawn time for given day.
Included day time length. Extra Shadow length calculation on the go with time flow. All result are copy-able.
Additionally you can set custom height object to see how much the shadow distance.

Rotate your device to see how the sun position it self with compass orientation.
Option to fast forward the time by 5 minute to see how the shadow change after sun movement.
Select custom location and time date to preview how the sun movement around the world.
 
Great App for outdoor adventurer who plan ahead their day time.

The zenith angle is the angle between the sun and the vertical. The zenith angle is similar to the elevation angle but it is measured from the vertical rather than from the horizontal, thus making the zenith angle = 90° - [sun height/elevation].

Solar azimuth angle is defined as the angle between the projection of sun's centre onto the horizontal plane and due south direction.

Dusk occurs at the darkest stage of twilight, or at the very end of astronomical twilight after sunset and just before night. At predusk, during early to intermediate stages of twilight, enough light in the sky under clear conditions may occur to read outdoors without artificial illumination; however, at the end of civil twilight (when Earth rotates to a point at which the center of the Sun's disk is 6° below the local horizon), such lighting is required to read outside. The term dusk usually refers to astronomical dusk, or the darkest part of twilight before night begins. 

Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning.

Noon (or midday) is the time when the Sun appears to contact the local celestial meridian. This is when the Sun reaches its apparent highest point in the sky, at 12 noon apparent solar time and can be observed using a sundial.

Sunset, also known as sundown, is the daily disappearance of the Sun below the horizon due to Earth's rotation.

Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect sunlight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's horizon. This morning twilight period will last until sunrise (when the Sun's upper limb breaks the horizon), when direct sunlight outshines the diffused light. 

Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

## Key features

- Interactive 3D sun movement simulation
- Calculates sun azimuth, height, and zenith angle
- Sunrise, sunset, dusk, and dawn time calculation
- Daytime length and shadow length calculation
- Custom object height for shadow distance
- Device rotation for compass orientation
- Time flow for shadow change preview

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sun-calculator/id1603759487/reviews.md

### 1/5 — Garbage

*2023-12-29*

Made by 89 year old or something

### 5/5 — How to avoid hot cars

*2022-08-11*

A brilliantly simple app for working out visually where the sun, and therefore also the shade, *will* be. With a little planning before a trip I work out where to park in a heatwave. Only bought this a few days ago and already used it half a dozen times to return to a cool (or less hot) car.

## Frequently asked questions about Sun Calculator

### What is Sun Calculator used for?

Sun Calculator is used to simulate the sun's movement and sunlight phases in a 3D environment. It helps users calculate sun azimuth, height, shadow length, and various twilight times for specific locations and dates.

### Does Sun Calculator work offline?

The provided data does not specify offline functionality. However, the app's core function of simulating sun movement and calculating solar data suggests it may operate without a constant internet connection once installed.

### What devices is Sun Calculator available on?

Sun Calculator is available on iPhone, iPad, and iPod devices.

### How much does Sun Calculator cost?

Sun Calculator is a paid app priced at $2.99.

### What is the age rating for Sun Calculator?

Sun Calculator has an age rating of 4+.

### How often is Sun Calculator updated?

The latest version is 1.1, and the app was last updated on December 15, 2025. This indicates a potential update schedule, though specific frequency is not detailed.

### Can I copy the results from Sun Calculator?

Yes, all results calculated by Sun Calculator, including sun azimuth, height, and shadow length, are copy-able for easy use in other applications or notes.

### Does Sun Calculator have ads?

No, Sun Calculator does not contain advertisements.

## Version history (last 2 releases)

### 1.1 — 2025-12-15

- Updated for the newest devices.
- Minor bugs fixed.

### 1.0 — 2022-01-07

No release notes.

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## More apps by Heng Jia Liang

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All apps by Heng Jia Liang: https://appshunter.io/developer/1532000635

## Related topics

[suncalc](https://appshunter.io/ios/topics/suncalc)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*