# Koyash16 - Sunny 16 calculator — Handy film photographer's tool

> Film photography calculator for Sunny 16 rule based on lighting. (iPhone/iPad app by Igor Savelev.)

- Source: https://appshunter.io/ios/app/koyash16-sunny-16-calculator/id6748782369 (this page in markdown: same URL + `.md`)
- Developer: [Igor Savelev](https://appshunter.io/developer/1032535174)
- Category: Photo & Video, Travel
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 3 MB
- Languages: American English
- Released: 2025-07-21
- Data updated: 2026-08-03
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/koyash16-sunny-16-calculator/id6748782369/reviews.md

## What is Koyash16?

Koyash16 - Sunny 16 Calculator

A simple, clean calculator for the classic Sunny 16 photography rule.

Whether you're shooting film or learning exposure fundamentals, Koyash16 helps you determine camera settings based on lighting conditions. Tap a condition tile to see the recommended aperture or shutter speed.

Perfect for understanding light.

FEATURES:
• Nine lighting conditions from snow to twilight
• Switch between aperture and shutter priority
• Adjustable stop scales (full, 1/2, and 1/3 stops)
• Exposure compensation and ND filter support
• Clean, single-screen interface

A straightforward tool for photographers who want to understand the relationship between light and camera settings. No complexity, just the essentials.

## Key features

- Sunny 16 rule calculator
- Nine lighting conditions
- Aperture/shutter priority switch
- Adjustable stop scales
- Exposure compensation
- ND filter support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Generous tip | $2.99 | one-time |
| Modest tip | $0.99 | one-time |
| Extravagant tip | $9.99 | one-time |
| Exceptional tip | $29.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/koyash16-sunny-16-calculator/id6748782369/reviews.md

### 5/5 — incredible app, underrated!!

*2026-02-07*

this app is incredibly useful and i’m eternally grateful to the developer for making it ad free!! clean, easy ui and no fluff. would highly recommend for anyone shooting film ❤️

## Frequently asked questions about Koyash16

### What is the Koyash16 app used for?

Koyash16 is a calculator designed to help photographers, especially film users, determine camera settings based on the Sunny 16 rule and various lighting conditions. It simplifies understanding the relationship between light and exposure.

### How many lighting conditions does Koyash16 offer?

Koyash16 includes nine distinct lighting conditions, ranging from bright snow to twilight, to provide accurate setting recommendations for diverse environments.

### Can I adjust the stop scales in Koyash16?

Yes, Koyash16 allows you to switch between aperture and shutter priority and offers adjustable stop scales, supporting full, 1/2, and 1/3 stops for precise control.

### Does Koyash16 support exposure compensation or ND filters?

Absolutely. Koyash16 includes support for exposure compensation and ND filters, making it a versatile tool for advanced exposure control in film photography.

### What is the user interface like in Koyash16?

Koyash16 features a clean, single-screen interface that prioritizes simplicity and ease of use. It presents essential information without unnecessary complexity.

### Is Koyash16 available on Android devices?

Based on the provided data, Koyash16 is currently only supported on iPhone devices. Compatibility with Android is not specified.

### How often is Koyash16 updated?

The latest version of Koyash16 is 2026.2, and it was last updated on March 3, 2026. This indicates a recent update, suggesting ongoing development and support.

### What is the age rating for Koyash16?

Koyash16 has an age rating of 4+, making it suitable for users of all ages. This rating suggests no mature content is present within the application.

## Version history (last 5 releases)

### 2026.2 — 2026-03-03

- Added App Store review request

### 2026.1 — 2026-01-19

- Added optional tip jar for supporting development

### 2025.4 — 2025-11-30

- Modernised app icon

### 2025.3 — 2025-09-25

- Removed incorrect and misleading values

### 2025.2 — 2025-08-07

- Minor fixes in UI

## Apps similar to Koyash16

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Developer Box for Film](https://appshunter.io/ios/app/developer-box-for-film/id1580604412) | — | Free | Photo & Video |
| [Luwian](https://appshunter.io/ios/app/luwian/id1519571900) | 4.5 (354) | Free | Photo & Video |
| [Kelvin Narrator](https://appshunter.io/ios/app/kelvin-narrator/id1606875885) | 5.0 (1) | Free | Photo & Video |
| [Mobiography Magazine](https://appshunter.io/ios/app/mobiography-magazine/id624150296) | 4.7 (103) | Free | Photo & Video |
| [DoF: Depth of Field Calculator](https://appshunter.io/ios/app/dof-depth-of-field-calculator/id1477589079) | 3.7 (15) | $1.99 | Photo & Video |
| [Light Meter for Vintage Camera](https://appshunter.io/ios/app/light-meter-for-vintage-camera/id6748360702) | 3.4 (9) | Free | Photo & Video |

## More apps by Igor Savelev

- [yul - GPX track recorder](https://appshunter.io/ios/app/yul-gpx-track-recorder/id6740010980)
- [Kaida - adding GPS to photos](https://appshunter.io/ios/app/kaida-adding-gps-to-photos/id6748287256)
- [Misgellar - film photos notes](https://appshunter.io/ios/app/misgellar-film-photos-notes/id6772962857)

All apps by Igor Savelev: https://appshunter.io/developer/1032535174

## Related topics

[sunny16 exposure calculator](https://appshunter.io/ios/topics/sunny16-exposure-calculator) · [film exposure calculator](https://appshunter.io/ios/topics/film-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 2026-08-03.*