# ND Slow Shutter vs ksAstroLens

The clearest difference is price: ND Slow Shutter at Free against ksAstroLens's $0.99. ksAstroLens's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

ND Slow Shutter is free to download; ksAstroLens costs $0.99 up front. ND Slow Shutter sells 1 one-off in-app purchase. ksAstroLens asks for nothing beyond the download.

ND Slow Shutter ships an update every 3 weeks, ksAstroLens every 3 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ND Slow Shutter | ksAstroLens |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 22 MB | 3 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Francesco Foianesi](https://appshunter.io/developer/1817962841) | [Christophe Calmejane](https://appshunter.io/developer/459572746) |

## What reviewers say

### ND Slow Shutter

[App page](https://appshunter.io/ios/app/nd-slow-shutter/id6747008686)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version | $2.99 | one-time |


### ksAstroLens

[App page](https://appshunter.io/ios/app/ksastrolens/id6793507862)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ND Slow Shutter free?

ND Slow Shutter is free to download, with in-app purchases available.

### Is ksAstroLens free?

ksAstroLens costs $0.99, with no in-app purchases.

### Do ND Slow Shutter or ksAstroLens have ads?

ND Slow Shutter shows ads; ksAstroLens does not.

### Which is updated more often, ND Slow Shutter or ksAstroLens?

ND Slow Shutter ships an update every 3 weeks, and ksAstroLens every 3 days. Most recently, ND Slow Shutter was updated on October 28, 2026 and ksAstroLens on October 29, 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.*