# USB Camera to NDI vs OBS 4K

The clearest difference is rating: OBS 4K at 4.7 against USB Camera to NDI's 3.9. OBS 4K also leads on update cadence (weekly vs every 5 weeks). USB Camera to NDI's advantage is ratings volume (102 vs 25). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. USB Camera to NDI sells 4 one-off in-app purchases and OBS 4K sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

OBS 4K holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 102 and 25 respectively. Written reviews complicate that: 25% of USB Camera to NDI's written reviews are positive against 22% of OBS 4K's, so the app with the better star average is not the one people write more warmly about.

USB Camera to NDI ships an update every 5 weeks, OBS 4K weekly. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | USB Camera to NDI | OBS 4K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (102 ratings)](https://appshunter.io/ios/app/usb-camera-to-ndi/id6476429895/reviews) | **[4.7 (25 ratings)](https://appshunter.io/ios/app/obs-4k/id6759115725/reviews)** |
| Number of ratings | **102** | 25 |
| Positive reviews | **25.0% of reviews** | 22.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 41 MB | 4 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [TopDirector Corporation](https://appshunter.io/developer/1581209934) | [Huseyin Bagana](https://appshunter.io/developer/1537624907) |

## What reviewers say

### USB Camera to NDI

[App page](https://appshunter.io/ios/app/usb-camera-to-ndi/id6476429895)

This app allows you to monitor and convert UVC cameras to NDI streams in real-time. It supports various NDI formats, offers simultaneous recording to Photos, and can extend camera capabilities using HDMI adapters.

**Highlights:** Monitor UVC cameras for free, Switch between multiple UVC cameras, Real-time NDI conversion, Supports FULL NDI, NDI HX H.264, NDI HX HEVC, Record to Photos simultaneously, NDI tally status indicator

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Enable NDI Sending | $4.99 | one-time |
| Enable Recording and Snapshot | $9.99 | one-time |
| HDMI, ScreenMirroring, AirPlay | $9.99 | one-time |


### OBS 4K

[App page](https://appshunter.io/ios/app/obs-4k/id6759115725)

Transform your iPhone into a professional 4K webcam for your Mac. Stream in high resolution with ultra-low latency and advanced controls. Ideal for video conferencing, live streaming, and content creation.

**Highlights:** 4K, 1080p, 720p streaming, Ultra-low latency, H.265 hardware encoding, Multiple lens support, Full zoom and exposure control, Custom stream profiles

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OBS 4K Pro Monthly | $5.99 | per month |
| OBS 4K Pro Yearly | $79.99 | per year |
| OBS 4K Pro Lifetime | $103.99 | one-time |


## Frequently asked questions

### Is USB Camera to NDI free?

USB Camera to NDI is free to download, with in-app purchases available.

### Is OBS 4K free?

OBS 4K is free to download, with in-app purchases available.

### Which has better reviews, USB Camera to NDI or OBS 4K?

OBS 4K is rated higher. USB Camera to NDI averages 3.9 out of 5 from 102 ratings, while OBS 4K averages 4.7 from 25 ratings.

### Do USB Camera to NDI or OBS 4K have ads?

Neither USB Camera to NDI nor OBS 4K shows ads.

### Which is updated more often, USB Camera to NDI or OBS 4K?

USB Camera to NDI ships an update every 5 weeks, and OBS 4K weekly. Most recently, USB Camera to NDI was updated on October 30, 2026 and OBS 4K on November 9, 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.*