TopDirector (NDI,SRT,UVC,RTSP) vs Sleight Lab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TopDirector (NDI,SRT,UVC,RTSP)
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.
- 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
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- Up to 9 inputs could be TopDirectorCam or any other external A/V sources that support NDI, NDI HX, SRT and RTSP protocols - Up to 4 UVC(USB -> HDMI) camera inputs on iPadOS 17 - Start all the built-in cameras on the iPhone/iPad simultaneously (Pro Max models could have up to 4 cameras, the earlier models could only choose one between the front and rear cameras) - Real-time transition among the external inputs, built-in cameras, and media in the Photo Library - Full Screen External HDMI & Wireless AirPlay via Screen Mirroring/AirPlay - Use the RTMP protocol which is used by most of the video platforms to 3 channel live streams, local record for backup, NDI or NDI|HX output at the same time - No need for cumbersome timeline operations, real-time playback to edit, getting video post-production easily - Valuable background music feature to easily create electronic albums with the Ken Burns special effects of photos - Customized and unlimited vector title and shape overlay with professional safety Down Stream Key(DSK) control - Independent and unlimited layers of translucent logo overlay and clock, countdown, and scoreboard - Support TopDirectorTitle App for remote title overlay via LAN, suitable for complex subtitle operations in live broadcasting - Perfectly embedded Apple Pencil (or use finger on the iPhone) to realize online sketch comments - Picture-in-picture effects for remote interviews, online teaching, video conferencing, etc, fully customizable video source, window size and position, distortion, dynamic background, edges, reflections, blur, and more - Used in conjunction with TopDirectorCam app for real-time slow-motion playback of live sports games - All operations support unlimited Undo and automatic alignment snap feature that all the professional people needed - Support the TALLY feature to mark the current PGM camera when switching among multiple cameras - Unique security protection keep maintaining output even in the background - No need to register, no any other subscription fees, one-time purchase for lifetime use Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Sleight Lab
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Standard mirrors force you to watch yourself while you perform, ruining your posture, tension, and misdirection. Sleight Lab fixes this. Designed for stage performers, FISM competitors, and close-up artists, Sleight Lab is a dual-engine video practice tool that helps you perfect your technique and build flawless routines. THE "BOOSTED MIRROR" (Auto-Loop Engine) Perfect for close-up and sleight of hand. Set your interval timer, perform your move naturally, and put your phone down. The app automatically records, replays for immediate feedback, and restarts the next take hands-free. THE EDITING TABLE (Studio Mode) Built for act rehearsal and stage routines. Film your entire performance without time limits. Use the built-in metronome to lock in your rhythm and sync with your music. MARKERS & ANALYSIS Review your Studio sessions and double-tap to drop timestamps exactly where you flash or miss a beat. Add notes to fix your choreography and mechanics later. GHOST LAYER An onion-skin overlay that helps you match your hand or body positions perfectly between takes to check your blind spots. Enter the Lab, stop breaking your flow, and build world-class magic. Terms of Use : https://sleightlabapp.com/terms/
Screenshots
Verdict
The clearest difference is iOS requirement: Sleight Lab at 15.1 against TopDirector (NDI,SRT,UVC,RTSP)'s 17.6. On price, update cadence, 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
Both are free to download. TopDirector (NDI,SRT,UVC,RTSP) sells 10 in-app purchases, starting at $49.99 per year and Sleight Lab sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
TopDirector (NDI,SRT,UVC,RTSP) ships an update every 10 days, Sleight Lab weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | TopDirector (NDI,SRT,UVC,RTSP) | Sleight Lab |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (114 ratings) — better | — |
| Positive reviews | 37.5% of reviews | — |
| Number of ratings | 114 — better | — |
| Update frequency | Every 10 days | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 98 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | TopDirector Corporation | Romain Maillard |
Bugs and requests
TopDirector (NDI,SRT,UVC,RTSP)
Reported bugs
17 issues- 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
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- NDI streaming to another computer does not work
- Cannot choose save location for recorded files (reverts to camera roll, renames/changes resolution)
- SRT does not work
- SRT output livestream not supported
- Audio of video clips does not work
- Audio does not work
- Video playback only works for clips under 10 seconds
- App crashes when feeding in 5 to 6 cameras
- App randomly crashes
- Tally does not work
- No audio from iPhones via NDI
- App crashes on launch after update
Requested features
19 requests- 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
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- Tutorials on optimal NDI usage
- Add a next cam option
- Better character generator
- Fix video playback for clips over 10 seconds
- Improve bitrate for YouTube streaming
- Add SRT output support
- Improve audio functionality
- More intuitive wireless camera setup
- Provide how-to videos or tutorials
- Allow recovery of previously purchased features
- Implement a trial period
- Fix tally functionality
- Add audio support for NDI streams
- Improve output section stability
Sleight Lab
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TopDirector (NDI,SRT,UVC,RTSP)
- Unlock All Features$49.991 Year
- NDI and TALLY$4.99
- Enable USB(UVC) Camera Input$4.99
- Screen Mirroring/AirPlay$9.99
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- PTZ Camera Control$9.99
- Picture in Picture Watermark$14.99
- Logo and Background Music$14.99
- Video Scopes, Color Grading$14.99
- UTitle, Title, NTitle, SuperFG$14.99
- Unlimited PGM Duration$14.99
Sleight Lab
- Monthly$3.991 Month
- Sleight Lab Pro Annual$29.991 Year
- Lifetime Access$69.99
Questions
Is TopDirector (NDI,SRT,UVC,RTSP) free?
Is Sleight Lab free?
Do TopDirector (NDI,SRT,UVC,RTSP) or Sleight Lab have ads?
Which is updated more often, TopDirector (NDI,SRT,UVC,RTSP) or Sleight Lab?
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