# ND Filter EV vs CosmoViewer

The clearest difference is price: CosmoViewer at Free against ND Filter EV's $0.49. CosmoViewer also leads on update cadence (every 2 weeks vs every 4 months). ND Filter EV's advantage is iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

CosmoViewer is free to download; ND Filter EV costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

ND Filter EV ships an update every 4 months, CosmoViewer every 2 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ND Filter EV | CosmoViewer |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 0 MB | 4 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stein Erik Nilsen](https://appshunter.io/developer/1737251651) | [Sergey Serov](https://appshunter.io/developer/604554653) |

## What reviewers say

### ND Filter EV

[App page](https://appshunter.io/ios/app/nd-filter-ev/id6479803711)

**Features:** macOS Compatibility

**In-app purchases:** none


### CosmoViewer

[App page](https://appshunter.io/ios/app/cosmoviewer/id6781242460)

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

**In-app purchases:** none


## Frequently asked questions

### Is ND Filter EV free?

ND Filter EV costs $0.49, with no in-app purchases.

### Is CosmoViewer free?

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

### Do ND Filter EV or CosmoViewer have ads?

Neither ND Filter EV nor CosmoViewer shows ads.

### Which is updated more often, ND Filter EV or CosmoViewer?

ND Filter EV ships an update every 4 months, and CosmoViewer every 2 weeks. Most recently, ND Filter EV was updated on November 8, 2026 and CosmoViewer on November 5, 2026.

---

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