# Neutral Density Calculator vs ND+Timer

The clearest difference is price: ND+Timer at Free against Neutral Density Calculator's $1.99. ND+Timer also leads on update cadence (every 2 months vs every 48 months) and review sentiment (60% vs 50%). Neutral Density Calculator's advantage is in-app purchases (none vs 1) and iOS requirement (13 vs 15.6). On ads and device support there is nothing between them.

ND+Timer is free to download; Neutral Density Calculator costs $1.99 up front. ND+Timer sells 1 one-off in-app purchase. Neutral Density Calculator asks for nothing beyond the download.

Neutral Density Calculator ships an update every 48 months, ND+Timer every 2 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Neutral Density Calculator | ND+Timer |
| --- | --- | --- |
| 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 | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 9 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Tobias Ullerich](https://appshunter.io/developer/1475365559) |

## 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+Timer

[App page](https://appshunter.io/ios/app/nd-plus-timer/id1534477340)

This app helps photographers determine correct exposure times for long exposure shots using ND filters. It includes a timer to capture the perfect moment and offers pro features through in-app purchases for enhanced functionality.

**Highlights:** Exposure time calculation with ND filters, Integrated timer for capturing moments, Notifications while device is locked, Dark mode (Pro feature), Lock screen widget with running timer (Pro feature), Dynamic Island support (Pro feature), Automatic exposure computation for multiple filters (Pro feature)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ND+Timer Pro | $1.99 | one-time |


## Frequently asked questions

### Is Neutral Density Calculator free?

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

### Is ND+Timer free?

ND+Timer is free to download, with in-app purchases available.

### Do Neutral Density Calculator or ND+Timer have ads?

Neither Neutral Density Calculator nor ND+Timer shows ads.

### Which is updated more often, Neutral Density Calculator or ND+Timer?

Neutral Density Calculator ships an update every 48 months, and ND+Timer every 2 months. Most recently, Neutral Density Calculator was updated on October 13, 2026 and ND+Timer 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.*