# Rail Scan vs AstroPup Sky

The clearest difference is iOS requirement: Rail Scan at 14.1 against AstroPup Sky's 26.0. 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.

## The numbers

| Metric | Rail Scan | AstroPup Sky |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astropup-sky/id6764730162/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Free |
| Size | 29 MB | 25 MB |
| Requires iOS | **14.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZEDAS GmbH](https://appshunter.io/developer/1453541981) | [Aaron Freimark](https://appshunter.io/developer/1533614349) |

## What reviewers say

### Rail Scan

[App page](https://appshunter.io/ios/app/rail-scan/id6469784707)

**In-app purchases:** none


### AstroPup Sky

[App page](https://appshunter.io/ios/app/astropup-sky/id6764730162)

This application provides a unique sky chart for astrophotographers, displaying celestial object visibility for an entire night. It allows users to personalize their view with custom horizons and receive clear-sky notifications for preferred observing locations.

**Highlights:** All-sky, all-night object visibility, Object rise and set times, Personalized horizon views, Clear-sky notifications, Supports custom horizon files

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rail Scan free?

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

### Is AstroPup Sky free?

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

### Do Rail Scan or AstroPup Sky have ads?

Neither Rail Scan nor AstroPup Sky shows ads.

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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.*