# NDCalc2 vs Neutral Density Calculator

The clearest difference is review sentiment: Neutral Density Calculator at 50% against NDCalc2's 0%. Neutral Density Calculator also leads on rating (3.4 vs 1.5). NDCalc2's advantage is update cadence (every 10 months vs every 48 months) and price ($0.99 vs $1.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

NDCalc2 costs $0.99 and Neutral Density Calculator $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Neutral Density Calculator holds the better App Store score, 3.4 against 1.5. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 0% of NDCalc2's written reviews are positive against 50% of Neutral Density Calculator's.

NDCalc2 ships an update every 10 months, Neutral Density Calculator every 48 months. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | NDCalc2 | Neutral Density Calculator |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/ndcalc2/id822835884/reviews) | **[3.4 (5 ratings)](https://appshunter.io/ios/app/neutral-density-calculator/id1343590260/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 48 months |
| Monetization | Paid | Paid |
| Size | 20 MB | 1 MB |
| Requires iOS | **7.0** | 13 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Boris Nienke](https://appshunter.io/developer/300699195) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### NDCalc2

[App page](https://appshunter.io/ios/app/ndcalc2/id822835884)

Calculate correct exposure times when using ND filters for long exposures. Easily manage your filter collection, add custom filters, and switch between single and multi-select modes for stacking.

**Highlights:** Calculate exposure time with ND filters, Supports iPhone 5/s/c screens, Multi-Select Mode for filter stacking, Add custom ND filters, Delete and reorder filters, Countdown timer for long exposures

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is NDCalc2 free?

NDCalc2 costs $0.99, with no in-app purchases.

### Is Neutral Density Calculator free?

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

### Which has better reviews, NDCalc2 or Neutral Density Calculator?

Neutral Density Calculator is rated higher. NDCalc2 averages 1.5 out of 5 from 2 ratings, while Neutral Density Calculator averages 3.4 from 5 ratings.

### Do NDCalc2 or Neutral Density Calculator have ads?

Neither NDCalc2 nor Neutral Density Calculator shows ads.

### Which is updated more often, NDCalc2 or Neutral Density Calculator?

NDCalc2 ships an update every 10 months, and Neutral Density Calculator every 48 months. Most recently, NDCalc2 was updated on October 8, 2026 and Neutral Density Calculator on October 13, 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.*