# AstroExposure — Astro Exposure Calculator

> Astro Exposure Calculator (iPhone/iPad app by Piriou Alain.)

- Source: https://appshunter.io/ios/app/astroexposure/id6793020002 (this page in markdown: same URL + `.md`)
- Developer: [Piriou Alain](https://appshunter.io/developer/6793020004)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 6 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-09-13
- Data updated: 2026-10-04
- User reviews in markdown: https://appshunter.io/ios/app/astroexposure/id6793020002/reviews.md

## What is AstroExposure?

AstroExposure is a simple, precise calculator for planning your night sky photography.

Choose your calculation method, enter your focal length, aperture, and sensor specifications, and instantly get a recommended exposure time to minimize star trailing.

The app supports the most widely used astrophotography rules, including the 500 Rule and the NPF Rule. You can also select a camera from the built-in database, adjust settings manually, and save your favorite configurations.

Key features:
• Astrophotography exposure time calculation
• 500 Rule and NPF Rule support
• Sensor or camera selection
• Focal length, aperture, and pixel size settings
• Favorites for quick access to your settings
• Clean, fast, and distraction-free interface

AstroExposure is designed for photographers who want to spend less time calculating and more time under the stars.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Espresso under the stars ☕️ | $0.99 | one-time |
| Latte under the stars ☕️🥛 | $2.99 | one-time |
| Coffee thermos under the stars 🫖 | $3.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-14

No release notes.

## Apps similar to AstroExposure

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Silverlog Stars](https://appshunter.io/ios/app/silverlog-stars/id6759198249) | — | Free | Photo & Video |
| [Star Exposure Calculator](https://appshunter.io/ios/app/star-exposure-calculator/id6670283794) | — | Free | Photo & Video |
| [Photography Essentials Calc](https://appshunter.io/ios/app/photography-essentials-calc/id6504422644) | 2.0 (1) | Free | Photo & Video |
| [ManualExposure](https://appshunter.io/ios/app/manualexposure/id697932594) | 4.1 (12) | Free | Photo & Video |
| [Mimeo Photos](https://appshunter.io/ios/app/mimeo-photos/id1464395421) | 4.4 (219) | Free | Photo & Video |
| [ON1 Photo RAW for Mobile](https://appshunter.io/ios/app/on1-photo-raw-for-mobile/id1476445141) | 4.5 (1,515) | Free | Photo & Video |

## Related topics

[star exposure calculator](https://appshunter.io/ios/topics/star-exposure-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-04.*