# Star Pupil vs AstroPic

The clearest difference is update cadence: Star Pupil at every 5 days against AstroPic's every 5 months. Star Pupil also leads on iOS requirement (13.0 vs 15.0). 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.

Star Pupil ships an update every 5 days, AstroPic every 5 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Star Pupil | AstroPic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/star-pupil/id6463496579/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 months |
| Monetization | Free | — |
| Size | 15 MB | 6 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard Craddock](https://appshunter.io/developer/1579756955) | [Ron Tabachnik](https://appshunter.io/developer/1687669075) |

## What reviewers say

### Star Pupil

[App page](https://appshunter.io/ios/app/star-pupil/id6463496579)

This app helps you practice celestial navigation by showing every step of sight reductions and plotting lines of position. It covers calculations for the Sun, planets, and stars using standard nautical publications.

**Highlights:** Step-by-step sight reductions, Plotting Lines of Position (LOPs), Calculations for Sun, Planets, Stars, Uses Pub 229 and Pub 249, Twilight calculations, Star selection assistance

**Features:** macOS Compatibility

**In-app purchases:** none


### AstroPic

[App page](https://appshunter.io/ios/app/astropic-apod/id6502918663)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Star Pupil free?

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

### Is AstroPic free?

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

### Do Star Pupil or AstroPic have ads?

Neither Star Pupil nor AstroPic shows ads.

### Which is updated more often, Star Pupil or AstroPic?

Star Pupil ships an update every 5 days, and AstroPic every 5 months. Most recently, Star Pupil was updated on November 3, 2026 and AstroPic on November 8, 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.*