# Star Exposure Calculator vs Shutter Sky

The clearest difference is in-app purchases: Star Exposure Calculator at none against Shutter Sky's 2. Star Exposure Calculator also leads on iOS requirement (13.0 vs 18.2). Shutter Sky's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. Shutter Sky sells 2 in-app purchases, starting at $0.99 per month. Star Exposure Calculator asks for nothing beyond the download.

Star Exposure Calculator ships an update every 2 weeks, Shutter Sky every 4 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Star Exposure Calculator | Shutter Sky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 25 MB | 1 MB |
| Requires iOS | **13.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dejan Boras](https://appshunter.io/developer/1612985659) | [Chase Higgins](https://appshunter.io/developer/1788526218) |

## What reviewers say

### Star Exposure Calculator

[App page](https://appshunter.io/ios/app/star-exposure-calculator/id6670283794)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shutter Sky

[App page](https://appshunter.io/ios/app/shutter-sky/id6742646107)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shutter Sky Monthly | $0.99 | per month |
| Shutter Sky Yearly | $9.99 | per year |


## Frequently asked questions

### Is Star Exposure Calculator free?

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

### Is Shutter Sky free?

Shutter Sky is free to download, with in-app purchases available.

### Do Star Exposure Calculator or Shutter Sky have ads?

Star Exposure Calculator shows ads; Shutter Sky does not.

### Which is updated more often, Star Exposure Calculator or Shutter Sky?

Star Exposure Calculator ships an update every 2 weeks, and Shutter Sky every 4 days. Most recently, Star Exposure Calculator was updated on October 30, 2026 and Shutter Sky on October 30, 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.*