Comparison

USB Camera to NDI vs OBS 4K

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

USB Camera to NDI

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
Read full description

- Monitoring any UVC camera for free - Switch in multiple UVC cameras - Audio UV meters included - Record to Photos simultaneously - Converts UVC camera to NDI in real-time, supports FULL NDI, NDI HX H.264, NDI HX HEVC - NDI tally status indicator - Use HDMI -> USB adapter to extend more traditional cameras, no longer need an expensive HDMI-NDI converter any more - Use a USB-C adapter with HDMI output for external full-screen monitoring - Use Apple TV, Google TV Stick or Amazon Fire TV Stick for wireless AirPlay monitoring

About

OBS 4K

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
Read full description

Turn your iPhone into a professional 4K camera for your Mac. OBS 4K streams your iPhone camera in stunning 4K resolution over USB or WiFi, with ultra-low latency H.265 hardware encoding. KEY FEATURES: • 4K, 1080p, and 720p streaming over USB or WiFi • H.265 hardware encoding for crystal-clear quality at minimal bandwidth • Ultra-low latency — see your camera feed in real time • Multiple lens support — switch between Ultra Wide, Wide, and Telephoto • Screen curtain mode to save battery while streaming PRO FEATURES: • 60 fps smooth capture for professional-quality video • Full zoom and exposure control with real-time adjustments • Focus and exposure lock for consistent shots • Custom stream profiles for quick setup • Advanced ISO, white balance, and torch controls PERFECT FOR: • Video conferencing (Zoom, Google Meet, Microsoft Teams) • Live streaming (OBS Studio, Streamlabs) • Content creation and YouTube recording • FaceTime calls in stunning quality • Professional video production OBS 4K creates a virtual camera on your Mac, so any app that uses a webcam can use your iPhone’s powerful camera system. Connect via USB for the best quality, or go wireless with WiFi. Download now and transform your iPhone into the ultimate webcam. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ioscorner.com/privacy.html

Screenshots

USB Camera to NDI1 screens
OBS 4K4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
USB Camera to NDI versus OBS 4K: the parameters behind the verdict, then further details
ParameterUSB Camera to NDIOBS 4K
PriceFreeFree
Rating3.9 (102 ratings)4.7 (25 ratings) — better
Positive reviews25.0% of reviews — better22.2% of reviews
Number of ratings102 — better25
Update frequencyEvery 5 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, Mac
Requires iOS17.617.0 — better
Further details — not scored
Size41 MB4 MB
Age rating4+4+
DeveloperTopDirector CorporationHuseyin Bagana

Customer experience

USB Camera to NDI

All ratings102 ratings
Positive70.6%
Neutral3.9%
Negative25.5%
Written reviews8 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

OBS 4K

All ratings24 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews9 reviews
Positive22.2%
Neutral0.0%
Negative77.8%

In-app purchases

4 purchases

USB Camera to NDI

One-time4
  • Remove Ads$0.99
  • Enable NDI Sending$4.99
  • Enable Recording and Snapshot$9.99
Show 1 more
  • HDMI, ScreenMirroring, AirPlay$9.99
3 purchases

OBS 4K

Subscriptions2
  • OBS 4K Pro Monthly$5.991 Month
  • OBS 4K Pro Yearly7 Days trial$79.991 Year
One-time1
  • OBS 4K Pro Lifetime$103.99

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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