# Neutral Density Calculator vs NDTimer

The clearest difference is update cadence: NDTimer at every 3 months against Neutral Density Calculator's every 48 months. On price, ads, in-app purchases and device support there is nothing between them.

Neutral Density Calculator costs $1.99 and NDTimer $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Neutral Density Calculator ships an update every 48 months, NDTimer every 3 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Neutral Density Calculator | NDTimer |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/neutral-density-calculator/id1343590260/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | **13** | 14.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Tim Kloess](https://appshunter.io/developer/1680704375) |

## What reviewers say

### Neutral Density Calculator

[App page](https://appshunter.io/ios/app/neutral-density-calculator/id1343590260)

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.

**Highlights:** ND filter stop input, Base shutter speed input, Calculated shutter speed output, Countdown timer for long exposures, Screen dimming during timer, Sound notification for timer completion, Supports up to 20-stop ND filters

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NDTimer

[App page](https://appshunter.io/ios/app/ndtimer-long-exposure/id6447485150)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Neutral Density Calculator free?

Neutral Density Calculator costs $1.99, with no in-app purchases.

### Is NDTimer free?

NDTimer costs $1.99, with no in-app purchases.

### Do Neutral Density Calculator or NDTimer have ads?

Neither Neutral Density Calculator nor NDTimer shows ads.

### Which is updated more often, Neutral Density Calculator or NDTimer?

Neutral Density Calculator ships an update every 48 months, and NDTimer every 3 months. Most recently, Neutral Density Calculator was updated on October 13, 2026 and NDTimer on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*