# ND Filter Calc vs EkteTid

The clearest difference is in-app purchases: ND Filter Calc at none against EkteTid's 1. ND Filter Calc also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. EkteTid sells 1 one-off in-app purchase. ND Filter Calc asks for nothing beyond the download.

ND Filter Calc ships an update every 6 days, EkteTid every 9 days. The most recent releases landed on September 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ND Filter Calc | EkteTid |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 9 days |
| Monetization | Free | — |
| Size | 47 MB | 57 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jerry Watson](https://appshunter.io/developer/1647846813) | [Elias Trana](https://appshunter.io/developer/1861473704) |

## 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


### EkteTid

[App page](https://appshunter.io/ios/app/ektetid/id6794649649)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EkteTid Pro | $0.49 | one-time |


## Frequently asked questions

### Is ND Filter Calc free?

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

### Is EkteTid free?

EkteTid is free to download, with in-app purchases available.

### Do ND Filter Calc or EkteTid have ads?

Neither ND Filter Calc nor EkteTid shows ads.

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

ND Filter Calc ships an update every 6 days, and EkteTid every 9 days. Most recently, ND Filter Calc was updated on September 30, 2026 and EkteTid on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*