NDCalculator

NDCalculator

Exposure Time Calculator

2 ratings
3 reviews

Archived App (Last seen on 16 Apr 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • December 5, 2019
  • December 12, 2025

Features

NDCalculator screenshot #1 for iPhone
NDCalculator screenshot #2 for iPhone
NDCalculator screenshot #3 for iPhone
iphone
ipad
🖼️Get Icon
Icons↘︎

About

Calculate camera exposure times when using ND filters for long exposure photography. This tool helps achieve desired creative effects by simplifying complex calculations.

ND filter exposure time calculation
Long exposure photography tool
Simplified exposure adjustments
Creative photography effects
Show original description

What's New in NDCalculator

1.4.1

December 12, 2025

change preview images

User reviews

Simply doesn't work at all

Doesn't matter what shutter speed or ND filter density is set the shutter speed at the top of the page always says 00.00.00
If you tap the timer it just keeps counting up until you stop it.
And even if it did work the shutter speed settings wheel is too coarse. It goes in 1 stop increments (1/400, 1/2000, 1/1000 etc) so if you have a shutter speed of let's say 1/1600 or 1/1200 you would just have to take a nearest guess.
But as it doesn't work at all I guess this is irrelevant.
Show more

Can’t see shutter times and most ND Filter size

iPhone 10 user. Can’t see the numbers nor can you tap in more than 12 stop filter. I use more than that if during the day and trying to smooth water. I like the timer function and wonder why all ND apps don’t have this option. Any exposure over 30 seconds a timer is a must.

Response from developer

Thanks for the feedback. The new upcomming version will have some improvements in the select dropdowns and added two more filter options. Maybe you'll give it another try.

Easy, simple

Little confused at first with the interface but then I saw the “How to” tab. Followed instructions and it was super easy from there. Love the timer - super helpful for those of us using bulb mode

Response from developer

Thanks for the feedback. Glad you enjoying using it. Calculation and timer was a must for me, thats why i created the app in the first place.

FAQ

What is NDCalculator used for?

NDCalculator is used to calculate camera exposure times when you are using an ND (Neutral Density) filter. This is essential for achieving correct exposures during long exposure photography.

Is NDCalculator free to use?

Yes, NDCalculator is available for free. It does not require any payment to download or use its core functionality.

What devices does NDCalculator support?

NDCalculator is designed for Apple devices, supporting iPhone, iPad, and iPod.

How often is NDCalculator updated?

The latest version of NDCalculator was released on December 12, 2025, indicating recent development activity. The app was initially released on December 5, 2019.

What is the age rating for NDCalculator?

NDCalculator has an age rating of 4+, making it suitable for users of all ages.

Does NDCalculator have ads?

No, NDCalculator does not contain advertisements. Users can enjoy the app without interruptions from ads.

What is the user rating for NDCalculator?

NDCalculator has a user rating of 3.0 stars based on 2 ratings. This suggests a mixed but limited user reception.