# SunGraph vs Sky Time

The clearest difference is rating: Sky Time at 4.2 against SunGraph's 3.1. Sky Time also leads on update cadence (every 2 months vs every 4 months) and iOS requirement (10.0 vs 13.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sky Time holds the better App Store score, 4.2 against 3.1. Both are backed by a comparable volume of ratings — 12 and 17 respectively. Written reviews point the same way: 57% of SunGraph's written reviews are positive against 60% of Sky Time's.

SunGraph ships an update every 4 months, Sky Time every 2 months. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SunGraph | Sky Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (12 ratings)](https://appshunter.io/ios/app/sungraph/id321534034/reviews) | **[4.2 (17 ratings)](https://appshunter.io/ios/app/sky-time/id473539346/reviews)** |
| Number of ratings | 12 | **17** |
| Positive reviews | 56.8% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 11 MB | 1 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tremont Air, LLC](https://appshunter.io/developer/309321587) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### SunGraph

[App page](https://appshunter.io/ios/app/sungraph/id321534034)

Calculate sunrise and sunset times for any location globally and any day of the year. Explore earliest/latest times, the equation of time, and sun inclination. Visualize the sun's position on Earth.

**Highlights:** Sunrise and sunset times worldwide, Earliest and latest sunrise/sunset, Equation of time display, Sun inclination at transit, World view of sun's position, User location database

**In-app purchases:** none


### Sky Time

[App page](https://appshunter.io/ios/app/sky-time/id473539346)

This app provides essential astronomy-related time data, including Julian Date, Universal Time, and Sidereal Time calculated using your device's location. It features a night-vision friendly red display and pop-up descriptions for easy understanding.

**Highlights:** Displays local, Julian, Local Sidereal, and Universal Time, Calculates Sidereal Time using device location, Night-vision friendly red display, Pop-up descriptions for time data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SunGraph free?

SunGraph is free to download, with no in-app purchases.

### Is Sky Time free?

Sky Time is free to download, with no in-app purchases.

### Which has better reviews, SunGraph or Sky Time?

Sky Time is rated higher. SunGraph averages 3.1 out of 5 from 12 ratings, while Sky Time averages 4.2 from 17 ratings.

### Do SunGraph or Sky Time have ads?

Neither SunGraph nor Sky Time shows ads.

### Which is updated more often, SunGraph or Sky Time?

SunGraph ships an update every 4 months, and Sky Time every 2 months. Most recently, SunGraph was updated on September 28, 2026 and Sky Time on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*