# Neutral Density Calculator vs FlashFlashApp

The clearest difference is price: Neutral Density Calculator at $1.99 against FlashFlashApp's $9.99. Neutral Density Calculator also leads on iOS requirement (13 vs 26.2). FlashFlashApp's advantage is update cadence (every 2 days vs every 48 months). On ads, in-app purchases and device support there is nothing between them.

Neutral Density Calculator costs $1.99 and FlashFlashApp $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Neutral Density Calculator ships an update every 48 months, FlashFlashApp every 2 days. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Neutral Density Calculator | FlashFlashApp |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| 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 2 days** |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | **13** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Egemen Gozoglu](https://appshunter.io/developer/944842459) |

## 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


### FlashFlashApp

[App page](https://appshunter.io/ios/app/flashflashapp/id6759476757)

**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 FlashFlashApp free?

FlashFlashApp costs $9.99, with no in-app purchases.

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

Neither Neutral Density Calculator nor FlashFlashApp shows ads.

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

Neutral Density Calculator ships an update every 48 months, and FlashFlashApp every 2 days. Most recently, Neutral Density Calculator was updated on October 13, 2026 and FlashFlashApp on October 11, 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.*