# Net Zero Emission vs DuoView

The clearest difference is in-app purchases: Net Zero Emission at none against DuoView's 12. Net Zero Emission also leads on update cadence (every 6 days vs fortnightly) and iOS requirement (11.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. DuoView sells 11 in-app purchases, starting at $3.99 per month. Net Zero Emission asks for nothing beyond the download.

Net Zero Emission ships an update every 6 days, DuoView fortnightly. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Net Zero Emission | DuoView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (65 ratings)](https://appshunter.io/ios/app/duoview-dual-camera-recorder/id6761603349/reviews)** |
| Number of ratings | — | **65** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | — | Freemium |
| Size | 53 MB | 64 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ekkarach nampokin](https://appshunter.io/developer/1675379935) | [Wachanga LTD](https://appshunter.io/developer/1521231523) |

## What reviewers say

### Net Zero Emission

[App page](https://appshunter.io/ios/app/net-zero-emission/id6456222778)

**Features:** macOS Compatibility

**In-app purchases:** none


### DuoView

[App page](https://appshunter.io/ios/app/duoview-dual-camera-recorder/id6761603349)

Record simultaneously with multiple cameras to capture different perspectives in a single take. This app allows for split-screen or picture-in-picture layouts, high-quality video output, and real-time control for efficient content creation.

**Highlights:** Dual camera recording, Portrait and landscape in one take, Split screen and overlay modes, High-quality video (4K, 1080p), Real-time preview and control, Time-lapse recording

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full aaccess | $3.99 | per month |
| Full aaccess | $4.99 | per 7 days |
| Full aaccess | $14.99 | per year |
| Full aaccess | $18.99 | per year |
| Full aaccess | $19.99 | per year |
| Full aaccess | $24.99 | per year |
| Full aaccess | $7.99 | one-time |
| Full aaccess | $9.99 | one-time |
| Full aaccess | $14.99 | one-time |
| Full aaccess | $19.99 | one-time |
| Full aaccess | $24.99 | one-time |


## Frequently asked questions

### Is Net Zero Emission free?

Net Zero Emission is free to download, with no in-app purchases.

### Is DuoView free?

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

### Do Net Zero Emission or DuoView have ads?

Neither Net Zero Emission nor DuoView shows ads.

### Which is updated more often, Net Zero Emission or DuoView?

Net Zero Emission ships an update every 6 days, and DuoView fortnightly. Most recently, Net Zero Emission was updated on October 14, 2026 and DuoView on October 24, 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.*