# ND Filter Calc

> Neutral density filter calculator with long exposure timer for photographers. (iPhone/iPad app by Jerry Watson.)

- Source: https://appshunter.io/ios/app/nd-filter-calc/id6449380764 (this page in markdown: same URL + `.md`)
- Developer: [Jerry Watson](https://appshunter.io/developer/1647846813)
- Category: Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 47 MB
- Released: 2023-05-22
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nd-filter-calc/id6449380764/reviews.md

## What is ND Filter Calc?

A simple neutral density filter calculator for photographers. Has a count-down timer for shutter speeds of 3 seconds and above.

## Key features

- Neutral density filter calculation
- Exposure compensation
- Long exposure timer
- Countdown for shutter speeds > 3 seconds
- Simple interface

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/nd-filter-calc/id6449380764/reviews.md

### 4/5 — Decent basic calculator

*2024-03-30*

Simple calculator that does what it says: calculates new exposure times. Unfortunately only goes to 10 stops, so if you have darker filters (like I do) it is of limited use.

## Frequently asked questions about ND Filter Calc

### What is ND Filter Calc used for?

ND Filter Calc is a tool for photographers to calculate the correct exposure when using neutral density (ND) filters. It helps determine how much to adjust shutter speed or aperture based on the filter's strength.

### Does ND Filter Calc have a timer?

Yes, ND Filter Calc includes a countdown timer specifically for shutter speeds of 3 seconds and above. This feature assists photographers during long exposure shots.

### What devices is ND Filter Calc available on?

ND Filter Calc is available on iPhone, iPad, and iPod touch devices. It is designed for Apple's mobile ecosystem.

### How often is ND Filter Calc updated?

The latest version, 1.4.0, was released on November 2, 2025. While specific update frequency isn't detailed, this indicates ongoing development and support.

### Is ND Filter Calc free to use?

Yes, ND Filter Calc is completely free to download and use. There are no costs associated with its basic functionality.

### What is the age rating for ND Filter Calc?

ND Filter Calc has an age rating of 4+. This suggests it is suitable for users of all ages, with no mature content.

### Does ND Filter Calc have ads?

No, ND Filter Calc does not contain advertisements. Users can enjoy the application without interruptions.

### When was ND Filter Calc first released?

ND Filter Calc was first released on May 22, 2023. This makes it a relatively recent addition to photography tools.

## Version history (last 5 releases)

### 1.4.0 — 2025-11-02

Added "Custom" to ND filter selection. When selected, user can add a custom f-stop from 0.1 to 20. This can be useful when stacking filters.

### 1.3.1 — 2025-10-26

Added the eclipse filter (16.5 f-stops).

### 1.3.0 — 2023-09-27

Added f-stop page showing full, 1/2, and 1/3 f-stop increments.

### 1.2.5 — 2023-07-18

Fixed a scroll issue on notes page.

### 1.2.4 — 2023-07-03

-Now saving notes to encrypted file for efficiency.
-Added hide keyboard button on notes page.

## Apps similar to ND Filter Calc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Long Exposure Calculator](https://appshunter.io/ios/app/long-exposure-calculator/id694553269) | 4.4 (62) | Free | Photo & Video |
| [Exposure Calculator](https://appshunter.io/ios/app/exposure-calculator/id6670614096) | — | $1.99 | Photo & Video |
| [Light Meter by WBPhoto](https://appshunter.io/ios/app/light-meter-by-wbphoto/id1524189195) | — | $6.99 | Photo & Video |
| [Star Exposure Calculator](https://appshunter.io/ios/app/star-exposure-calculator/id6670283794) | — | Free | Photo & Video |
| [Neutral Density Calculator](https://appshunter.io/ios/app/neutral-density-calculator/id1343590260) | 3.5 (4) | $1.99 | Photo & Video |
| [ND Filters](https://appshunter.io/ios/app/nd-filters/id1449381658) | — | $0.99 | Photo & Video |

## More apps by Jerry Watson

- [CheckMyList](https://appshunter.io/ios/app/checkmylist/id1658603080)
- [mConvertIt](https://appshunter.io/ios/app/mconvertit/id6443702534)
- [Color Calc+](https://appshunter.io/ios/app/color-calc-plus/id6443727733)
- [TeaTimer+](https://appshunter.io/ios/app/teatimer-plus/id6443954908)
- [MyItems+](https://appshunter.io/ios/app/myitems-plus/id6444588899)
- [SafePass+](https://appshunter.io/ios/app/safepass-plus/id6444777357)

All apps by Jerry Watson: https://appshunter.io/developer/1647846813

## Related topics

[nisi nd calculator](https://appshunter.io/ios/topics/nisi-nd-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 2026-06-01.*