# Theta vs ND Filter EV

The clearest difference is price: Theta at Free against ND Filter EV's $0.49. ND Filter EV's advantage is iOS requirement (13.0 vs 17). On update cadence, ads, in-app purchases and device support there is nothing between them.

Theta 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.

Theta ships an update every 3 months, ND Filter EV every 4 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Theta | ND Filter EV |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Size | 18 MB | 0 MB |
| Requires iOS | 17 | **13.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Mikhail Fedorov](https://appshunter.io/developer/714735606) | [Stein Erik Nilsen](https://appshunter.io/developer/1737251651) |

## What reviewers say

### Theta

[App page](https://appshunter.io/ios/app/theta-meter-x/id1510300649)

**In-app purchases:** none


### ND Filter EV

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Theta free?

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

### Is ND Filter EV free?

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

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

Neither Theta nor ND Filter EV shows ads.

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

Theta ships an update every 3 months, and ND Filter EV every 4 months. Most recently, Theta was updated on October 29, 2026 and ND Filter EV on October 25, 2026.

---

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