# NDI Test Patterns vs TopDirector (NDI,SRT,UVC,RTSP)

The clearest difference is review sentiment: NDI Test Patterns at 100% against TopDirector (NDI,SRT,UVC,RTSP)'s 38%. NDI Test Patterns also leads on rating (5.0 vs 4.1) and in-app purchases (none vs 10). TopDirector (NDI,SRT,UVC,RTSP)'s advantage is update cadence (every 10 days vs every 4 months) and ratings volume (114 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. TopDirector (NDI,SRT,UVC,RTSP) sells 10 in-app purchases, starting at $49.99 per year. NDI Test Patterns asks for nothing beyond the download.

NDI Test Patterns holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: TopDirector (NDI,SRT,UVC,RTSP) has 114 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of NDI Test Patterns's written reviews are positive against 38% of TopDirector (NDI,SRT,UVC,RTSP)'s.

NDI Test Patterns ships an update every 4 months, TopDirector (NDI,SRT,UVC,RTSP) every 10 days. The most recent releases landed on October 6, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | NDI Test Patterns | TopDirector (NDI,SRT,UVC,RTSP) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ndi-test-patterns/id1571995248/reviews)** | [4.1 (114 ratings)](https://appshunter.io/ios/app/topdirector-ndisrtuvcrtsp/id1581209932/reviews) |
| Number of ratings | 2 | **114** |
| Positive reviews | **100.0% of reviews** | 37.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | **Free** | Paid |
| Size | 10 MB | 98 MB |
| Requires iOS | **14.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vi(z)rt, Inc](https://appshunter.io/developer/573312611) | [TopDirector Corporation](https://appshunter.io/developer/1581209934) |

## What reviewers say

### NDI Test Patterns

[App page](https://appshunter.io/ios/app/ndi-test-patterns/id1571995248)

Transform your mobile device into a professional NDI® test pattern generator. Send video and audio test signals, or create custom slideshows using your own images. Ideal for live video production workflows.

**Highlights:** Mobile NDI test pattern source, Audio test tone generation, Custom NDI slideshows, High-resolution photo support, Automatic NDI device recognition, iPhone and iPad compatible

**Features:** Vision Pro support

**In-app purchases:** none


### TopDirector (NDI,SRT,UVC,RTSP)

[App page](https://appshunter.io/ios/app/topdirector-ndisrtuvcrtsp/id1581209932)

This app allows users to switch between multiple video sources, including external cameras and built-in device cameras, for live streaming and recording. It offers advanced features like real-time transitions, overlays, picture-in-picture effects, and remote control capabilities.

**Highlights:** Multicam switching (up to 9 inputs), Supports NDI, SRT, UVC, RTSP protocols, Real-time transitions and playback, Customizable overlays (titles, logos, clock), Picture-in-picture effects, Remote title overlay via LAN, Live sports slow-motion playback

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $49.99 | per year |
| NDI and TALLY | $4.99 | one-time |
| Enable USB(UVC) Camera Input | $4.99 | one-time |
| Screen Mirroring/AirPlay | $9.99 | one-time |
| PTZ Camera Control | $9.99 | one-time |
| Picture in Picture Watermark | $14.99 | one-time |
| Logo and Background Music | $14.99 | one-time |
| Video Scopes, Color Grading | $14.99 | one-time |
| UTitle, Title, NTitle, SuperFG | $14.99 | one-time |
| Unlimited PGM Duration | $14.99 | one-time |

**What reviewers like**

- 💡 Game-changer for portable churches
- 💡 Zero wires, no tangled mess
- 💡 Flexible upgrades, not forced bloat
- 💡 Saves money compared to traditional setups
- 💡 Bluetooth video switcher integration

**What reviewers complain about**

- 💸 Hidden pricing, very expensive
- 💸 Burned money, no refund
- 💸 Waste of money
- 💸 Not a cheap app with IAPs
- 💸 Expensive product

**Reported bugs**

- Crashes at opening on iPad Pro M2
- iPad camera always 30fps despite correct config
- App freezes when syncing iPad Pro with iPhone
- App crashes every time after latest update
- App won't open if 'Don't allow' is selected for album access

**Requested features**

- PIP templates with square or round screens
- Scrolling text in overlays
- Ability to replay, back-forward, adjust speed, freeze
- RTMP input support
- OSC control for Stream Decks


## Frequently asked questions

### Is NDI Test Patterns free?

NDI Test Patterns is free to download, with no in-app purchases.

### Is TopDirector (NDI,SRT,UVC,RTSP) free?

TopDirector (NDI,SRT,UVC,RTSP) is free to download, with in-app purchases available.

### Which has better reviews, NDI Test Patterns or TopDirector (NDI,SRT,UVC,RTSP)?

NDI Test Patterns is rated higher. NDI Test Patterns averages 5.0 out of 5 from 2 ratings, while TopDirector (NDI,SRT,UVC,RTSP) averages 4.1 from 114 ratings.

### Do NDI Test Patterns or TopDirector (NDI,SRT,UVC,RTSP) have ads?

Neither NDI Test Patterns nor TopDirector (NDI,SRT,UVC,RTSP) shows ads.

### Which is updated more often, NDI Test Patterns or TopDirector (NDI,SRT,UVC,RTSP)?

NDI Test Patterns ships an update every 4 months, and TopDirector (NDI,SRT,UVC,RTSP) every 10 days. Most recently, NDI Test Patterns was updated on October 6, 2026 and TopDirector (NDI,SRT,UVC,RTSP) on October 22, 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.*