Super!
Difficulty in finding such an app. Using 16 stop filter was difficult but a friend recommended it. Covers all ND filters. Ideal!
Terrible App
It doesnβt allow you to set ISO or aperture. Totally useless.

This utility app assists photographers in determining the correct shutter speed when using neutral density filters. Input your filter's stops and base shutter speed to instantly get the adjusted exposure time, with an optional countdown timer for long exposures.
1.2
December 22, 2025
- Updated for the newest devices. - Minor bugs fixed.
The Neutral Density Calculator is a utility app for photographers. It helps you calculate the correct shutter speed when using neutral density (ND) filters on your camera lens, ensuring proper exposure.
You input the number of stops of your ND filter and your base shutter speed (without the filter). The app then instantly calculates the new shutter speed required with the filter attached.
Yes, it includes a built-in countdown timer that is particularly useful for exposures longer than 60 seconds (bulb mode). You can also choose to dim the screen and enable/disable sound notifications for when the timer reaches zero.
The Neutral Density Calculator is a paid app, priced at $1.99. This one-time purchase grants you access to all its features.
The app is designed for iOS devices, including the iPhone, iPad, and iPod. It requires iOS 4+ and is optimized for various screen sizes.
The app was last updated on December 22, 2025, indicating ongoing support and potential for future improvements. The current version is 1.2.
The Neutral Density Calculator has an age rating of 4+, making it suitable for users of all ages. It contains no mature content.
No, the Neutral Density Calculator does not contain advertisements. It is a paid application that offers an ad-free experience.