# Neutral Density Calculator vs ND Filter Calc

The clearest difference is review sentiment: ND Filter Calc at 100% against Neutral Density Calculator's 50%. ND Filter Calc also leads on price (Free vs $1.99) and update cadence (every 6 days vs every 48 months). Neutral Density Calculator's advantage is iOS requirement (13 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

ND Filter Calc is free to download; Neutral Density Calculator costs $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, ND Filter Calc every 6 days. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Neutral Density Calculator | ND Filter Calc |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| 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 | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 6 days** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 47 MB |
| Requires iOS | **13** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Jerry Watson](https://appshunter.io/developer/1647846813) |

## 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


### ND Filter Calc

[App page](https://appshunter.io/ios/app/nd-filter-calc/id6449380764)

This tool helps photographers calculate neutral density filter effects on their camera's exposure. It includes a countdown timer for long exposures, simplifying the process of achieving desired results.

**Highlights:** Neutral density filter calculation, Exposure compensation, Long exposure timer, Countdown for shutter speeds > 3 seconds, Simple interface

**In-app purchases:** none


## Frequently asked questions

### Is Neutral Density Calculator free?

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

### Is ND Filter Calc free?

ND Filter Calc is free to download, with no in-app purchases.

### Do Neutral Density Calculator or ND Filter Calc have ads?

Neither Neutral Density Calculator nor ND Filter Calc shows ads.

### Which is updated more often, Neutral Density Calculator or ND Filter Calc?

Neutral Density Calculator ships an update every 48 months, and ND Filter Calc every 6 days. Most recently, Neutral Density Calculator was updated on October 24, 2026 and ND Filter Calc on September 30, 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.*