# Long Exposure Calculator vs ND Filter Calc

The clearest difference is in-app purchases: ND Filter Calc at none against Long Exposure Calculator's 6. ND Filter Calc also leads on ads (none vs shown) and update cadence (every 6 days vs every 19 months). Long Exposure Calculator's advantage is iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Long Exposure Calculator sells 6 one-off in-app purchases. ND Filter Calc asks for nothing beyond the download.

Long Exposure Calculator ships an update every 19 months, ND Filter Calc every 6 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Long Exposure Calculator | ND Filter Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (64 ratings)](https://appshunter.io/ios/app/long-exposure-calculator/id694553269/reviews)** | — |
| Number of ratings | **64** | — |
| Positive reviews | 81.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 6 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 47 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Junel Corales](https://appshunter.io/developer/694553272) | [Jerry Watson](https://appshunter.io/developer/1647846813) |

## What reviewers say

### Long Exposure Calculator

[App page](https://appshunter.io/ios/app/long-exposure-calculator/id694553269)

Calculate precise exposure times for long-exposure photography with Neutral Density filters. Features a countdown timer for exposures over 10 seconds and supports up to 24 stops of ND filtration.

**Highlights:** ND filter exposure calculation, Countdown timer, Supports up to 24-stop ND filters, Simple to use

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leave a Tip | $1.99 | one-time |
| Leave a Tip | $2.99 | one-time |
| Leave a Tip | $3.99 | one-time |
| Leave a Tip | $5.99 | one-time |
| Leave a Tip | $9.99 | one-time |
| Leave a tip | $14.99 | one-time |

**What reviewers like**

- 👍 Simple and intuitive interface
- 🚀 Fast and efficient calculations
- ✅ Accurate results
- 💡 Versatile ND filter notation options
- 🎨 Offers light and dark color schemes

**What reviewers complain about**

- ⚠️ Ads can be intrusive and accidentally tappable
- 🤔 Some users confused by filter notation settings
- 🚫 Does not factor in aperture
- ⏳ Timer only starts from 30 seconds
- ❌ App freezes or crashes after use/updates

**Reported bugs**

- App freezes after each use
- App crashes after update
- App freezes and needs to be closed and reopened
- App runs no more after iOS update
- App crashes and cannot be opened again

**Requested features**

- Filter bag feature to select owned filters
- Ability to edit existing filters for precise values
- Combine multiple filters in calculations
- Option to display calculated time in seconds only
- Acoustic signal/alarm at the end of the timer


### 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 Long Exposure Calculator free?

Long Exposure Calculator is free to download, with in-app purchases available.

### Is ND Filter Calc free?

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

### Do Long Exposure Calculator or ND Filter Calc have ads?

Long Exposure Calculator shows ads; ND Filter Calc does not.

### Which is updated more often, Long Exposure Calculator or ND Filter Calc?

Long Exposure Calculator ships an update every 19 months, and ND Filter Calc every 6 days. Most recently, Long Exposure Calculator was updated on November 1, 2026 and ND Filter Calc on November 3, 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.*