# Track Sun vs AstroPup View

The clearest difference is update cadence: AstroPup View at every 2 weeks against Track Sun's every 5 months. Track Sun's advantage is iOS requirement (14.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Track Sun ships an update every 5 months, AstroPup View every 2 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Track Sun | AstroPup View |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astropup-view/id6752028730/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 43 MB | 21 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [SynUe Tech. Co., Ltd](https://appshunter.io/developer/1475652738) | [Aaron Freimark](https://appshunter.io/developer/1533614349) |

## What reviewers say

### Track Sun

[App page](https://appshunter.io/ios/app/track-sun/id6737474745)

**Features:** macOS Compatibility

**In-app purchases:** none


### AstroPup View

[App page](https://appshunter.io/ios/app/astropup-view/id6752028730)

Easily manage and view astronomical image files like FITS and XISF. Offers GPU-accelerated rendering, automatic stretching, and QuickLook integration for a seamless user experience. Create icons and display smart metadata directly from your files.

**Highlights:** FITS and XISF format support, GPU-accelerated rendering, Automatic advanced stretching, QuickLook integration, Icon creation, Smart metadata display

**In-app purchases:** none


## Frequently asked questions

### Is Track Sun free?

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

### Is AstroPup View free?

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

### Do Track Sun or AstroPup View have ads?

Neither Track Sun nor AstroPup View shows ads.

### Which is updated more often, Track Sun or AstroPup View?

Track Sun ships an update every 5 months, and AstroPup View every 2 weeks. Most recently, Track Sun was updated on October 27, 2026 and AstroPup View on October 30, 2026.

---

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