# ND Filter Calc vs Kamera Express

ND Filter Calc and Kamera Express are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ND Filter Calc ships an update every 6 days, Kamera Express every 2 weeks. The most recent releases landed on September 30, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | ND Filter Calc | Kamera Express |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 47 MB | 49 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jerry Watson](https://appshunter.io/developer/1647846813) | [Kamera Express](https://appshunter.io/developer/1847927846) |

## What reviewers say

### 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


### Kamera Express

[App page](https://appshunter.io/ios/app/kamera-express/id6746223410)

**In-app purchases:** none


## Frequently asked questions

### Is ND Filter Calc free?

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

### Is Kamera Express free?

Kamera Express is free to download, with no in-app purchases.

### Do ND Filter Calc or Kamera Express have ads?

Neither ND Filter Calc nor Kamera Express shows ads.

### Which is updated more often, ND Filter Calc or Kamera Express?

ND Filter Calc ships an update every 6 days, and Kamera Express every 2 weeks. Most recently, ND Filter Calc was updated on September 30, 2026 and Kamera Express on October 15, 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.*