# SunGraph vs AstroNav SkyDial

The clearest difference is review sentiment: AstroNav SkyDial at 100% against SunGraph's 57%. AstroNav SkyDial also leads on rating (5.0 vs 3.1) and update cadence (every 2 weeks vs every 4 months). SunGraph's advantage is in-app purchases (none vs 2) and ratings volume (12 vs 2). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. AstroNav SkyDial sells 2 in-app purchases, starting at $1.99 per year. SunGraph asks for nothing beyond the download.

AstroNav SkyDial holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: SunGraph has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 57% of SunGraph's written reviews are positive against 100% of AstroNav SkyDial's.

SunGraph ships an update every 4 months, AstroNav SkyDial every 2 weeks. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SunGraph | AstroNav SkyDial |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (12 ratings)](https://appshunter.io/ios/app/sungraph/id321534034/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/astronav-skydial/id6793818116/reviews)** |
| Number of ratings | **12** | 2 |
| Positive reviews | 56.8% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 11 MB | 106 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tremont Air, LLC](https://appshunter.io/developer/309321587) | [Timespace Atlas, LLC](https://appshunter.io/developer/6793818118) |

## 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


### AstroNav SkyDial

[App page](https://appshunter.io/ios/app/astronav-skydial/id6793818116)

Visualize celestial movements in real-time with a dynamic dial showing the sun, moon, and planets. Explore upcoming astronomical events and plan your stargazing sessions.

**Highlights:** Real-time sun and moon tracking, Planetary movement visualization, Interactive sky dial, Event feed for stargazing opportunities, 48-hour forecast slider, Zodiac constellation identification

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AstroNav Pro Annual | $1.99 | per year |
| AstroNav Pro (Lifetime) | $9.99 | one-time |


## Frequently asked questions

### Is SunGraph free?

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

### Is AstroNav SkyDial free?

AstroNav SkyDial is free to download, with in-app purchases available.

### Which has better reviews, SunGraph or AstroNav SkyDial?

AstroNav SkyDial is rated higher. SunGraph averages 3.1 out of 5 from 12 ratings, while AstroNav SkyDial averages 5.0 from 2 ratings.

### Do SunGraph or AstroNav SkyDial have ads?

Neither SunGraph nor AstroNav SkyDial shows ads.

### Which is updated more often, SunGraph or AstroNav SkyDial?

SunGraph ships an update every 4 months, and AstroNav SkyDial every 2 weeks. Most recently, SunGraph was updated on September 28, 2026 and AstroNav SkyDial on October 12, 2026.

---

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