Comparison

4 vs Accsoon SEE

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

Head to head
About

4

Features
Read full description

4:20 is an SMPTE LTC timecode reader and generator for iPhone and iPad. It reads timecode from a wired audio input and shows lock, frame rate, drop frame, measured rate, direction, and level. It can generate LTC at the same time, over the same connection. The reader is made for troubleshooting. When a rig will not chase, plug into the line and check the code where you stand: the rate as measured against what the source claims, drop frame or not, which direction it is running, and how hot the line is. Mislabeled rates, code that should have stopped, and low or clipping levels all show up in the first few seconds. Between cues, it works as a confidence monitor on any line you need to trust. The screen does not sleep while a mode is running, and timecode keeps going when you switch to another app. Checking a message does not stop the code. READER • Lock state and a full readout: frame rate with drop frame flag, measured rate, direction, level • Runs continuously and keeps reading through route changes and interruptions • Keeps reading in the background while you use another app • If iOS takes the audio session away, the readout dims and says so instead of holding stale numbers GENERATOR • 23.976, 24, 25, 29.97 drop frame, and 30 fps • Start from any timecode, or generate time of day • Output level control, with left, right, or both channel routing • Anchored to the system clock, so long runs hold their time • Keeps generating in the background while you use another app • Runs alongside the reader for loop-through checks • Warns before sending LTC to a speaker, Bluetooth, or AirPlay, and requires a press-and-hold to override REQUIREMENTS A wired audio connection: a class-compliant USB audio interface, or a headset-jack adapter with a line input. There is no microphone mode. This version reads and generates LTC only; MIDI timecode is not supported. PRIVACY No account, no analytics, and no network connection. Nothing leaves the device. Made for production sound, playback and show control, video engineering, DIT carts, and broadcast maintenance.

About

Accsoon SEE

Transform your phone into a professional video monitor, recorder, and live streamer. This app offers advanced monitoring tools, direct streaming to popular platforms, and HD video recording for easy sharing and editing.

Highlights
  • Professional video monitoring tools
  • Live streaming to platforms
  • HD video recording
  • Use phone as a monitor
  • Direct streaming from HDMI sources
  • Record to camera roll
Features
Read full description

Accsoon SeeMo creates a profound shift in the way that people monitor, record and stream.  With a ton of features like professional monitoring functions, live streaming, audio & video recorder, this simple and clean app provides an easy way to use your phone as a professional monitor, streamer and more. Plug and SEE Monitoring HD video on your iPhone and iPad via Accsoon SEE featuring professional functions such as Gray scale/RGB, False color/Zebra.  Livestream from anywhere Accsoon SEE can also stream HD video directly to popular streaming platforms including Facebook Live, Twitch, and YouTube from your camera, mixer or other HDMI source. Use it to livestream your travels, gym classes,university lectures, parties or weddings from your camera in HD quality.  Record for instant sharing Accsoon SEE can record a H.264 HD video directly from your camera to your iPhone or iPad’s camera roll for instant review, quick editing, and easy sharing to your socials giving you complete confidence and enjoyment in what you’re capturing. All new technology - just imagine what you can do Accsoon SeeMo and Accsoon SEE work together to create a completely new way to capture and share video for distribution wherever you need it via iOS. This will be enhanced even further with future integrations and additional app features - the possibilities are limitless.

Screenshots

44 screens
Accsoon SEE4 screens

Verdict

The call

The clearest difference is price: Accsoon SEE at Free against 4's $4.99. Accsoon SEE also leads on iOS requirement (15.6 vs 17.0). 4's advantage is in-app purchases (none vs 5) and update cadence (every 4 days vs fortnightly). On ads and device support 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

Accsoon SEE is free to download; 4 costs $4.99 up front. Accsoon SEE sells 5 one-off in-app purchases. 4 asks for nothing beyond the download.

UpkeepUpdate frequency

4 ships an update every 4 days, Accsoon SEE fortnightly. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
4 versus Accsoon SEE: the parameters behind the verdict, then further details
Parameter4Accsoon SEE
Price$4.99Free — better
Rating—3.4 (49 ratings) — better
Positive reviews—47.6% of reviews
Number of ratings—49 — better
Update frequencyEvery 4 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size1 MB198 MB
Age rating4+4+
DeveloperUpload Studio Ltd.Chengdu Accsoon Technology Co., Ltd

Bugs and requests

4

Not enough reviews yet to summarise bugs or requests.

Accsoon SEE

Reported bugs

12 issues
  • Black screen on iPhone 14 Pro Max
  • Stopped working after firmware update
  • Network error within the app
  • Latest update causes crash on launch
  • Buttons on edges of screen cut off on iPhone 15
Show 7 more
  • Preview pictures do not match app updates
  • iOS See App does not connect to Accsoon CineView SE system
  • Image is upside down in vertical mode
  • Live stream lags and crashes
  • Image freezes seconds after start
  • Video feed freezes after a few seconds on iPhone 15 Pro Max
  • Overlay option does not appear on live feed

Requested features

24 requests
  • Continue live streaming in background
  • Expand functionality to Nikon and Fujifilm
  • Add 360-degree rotation of image preview
  • App remembers transmitter
  • Allow scale adjustment for crosshairs
Show 19 more
  • Add El Zone exposure tool
  • Update UI for iPhone 15 screen
  • Update See App for iOS mobile devices
  • Make compatible with older iOS versions
  • Stretch image to iPad display format
  • Add web overlays
  • Load URL web overlay sources
  • Output LUT to live stream
  • Add logo for streaming
  • Simple way to zoom back out to 100%
  • Fix overlay option
  • Record with desqueeze and LUT baked in
  • Improve live stream overlay features (text, graphics, time, GPS, map, motion)
  • Improve scene switching
  • Automatic reconnection for live stream
  • Improve audio input support (mu麦)
  • Reduce volume UI size and add transparency
  • Improve waveform display
  • Record 4K

In-app purchases

None

4

No in-app purchases

5 purchases

Accsoon SEE

One-time5
  • 100$0.99
  • 50$0.99
  • 200$2.99
Show 2 more
  • 500$6.99
  • 1000$14.99

Questions

Is 4 free?
4 costs $4.99, with no in-app purchases.
Is Accsoon SEE free?
Accsoon SEE is free to download, with in-app purchases available.
Do 4 or Accsoon SEE have ads?
Neither 4 nor Accsoon SEE shows ads.
Which is updated more often, 4 or Accsoon SEE?
4 ships an update every 4 days, and Accsoon SEE fortnightly. Most recently, 4 was updated on October 31, 2026 and Accsoon SEE on November 3, 2026.

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