# LTC-Generator

> Generates SMPTE linear time code for video and film frame synchronization. (iPhone/iPad app by Zhuoyao lu.)

- Source: https://appshunter.io/ios/app/ltc-generator/id1467829287 (this page in markdown: same URL + `.md`)
- Developer: [Zhuoyao lu](https://appshunter.io/developer/894406093)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 1.67/5 from 6 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 16 · 1 MB
- Languages: English
- Released: 2019-06-25
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ltc-generator/id1467829287/reviews.md

## What is LTC?

This app can generate SMPTE linear time code for testing. SMPTE timecode is a set of cooperating standards to label individual frames of video or film with a timecode. 

The audio output generated from this app is not for human listening, it is for controlling a video playback on another device. 

You can run the app in the background when your device's screen is locked. You can output the audio though the headphone jack, airplay or bluetooth. 

In the full version, you are able to:
- Select different frame rate: 23.976, 24, 25, 29.97, 30
- Set the starting time.
- Set the ending time to automatically stop or alternatively continue playing until you press stop.

In the free version:
- Select different frame rate: 23.976, 24, 25, 29.97, 30
- Timecode starts from the current device time.
- Automatically stops generating and playing at midnight or press stop manually.

## Key features

- Generate SMPTE linear time code
- Audio output for playback control
- Background operation with screen locked
- Multiple audio output options
- Selectable frame rates
- Customizable start and end times (full version)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full version | $5.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/ltc-generator/id1467829287/reviews.md

### 2/5 — Flawed

*2024-09-02*

Could be better with the generation of time-of-day code. Seems to get the time at program start, before it starts the generator so it’s always late compared to device (real) time. The paid version does not indicate this would work properly. Until the generated code is closer (exactly) to actual time-of-day then cannot recommend.

### 2/5 — Didn’t work with my iPhone

*2023-11-26*

The app installed easily, allows selection of frame rate and warns that the free version will only run up to midnight however the it only runs for a second and then stops.

Shame really, it seemed ideal for my purposes - to set clocks.

### 1/5 — Should’ve read the reviews.

*2023-09-16*

If you are looking to generate a file that you can insert into an edit with this app, you will not be able to do so.

### 1/5 — Latest update 3.0 does NOT work at all.

*2023-05-20*

May2023 version 3.0 starts for a moment then immediately stops. 👎👎

### 1/5 — Not fixed

*2022-03-31*

Shirt burst big is not fixed. Outside of that it would be useful. But doesn’t generate contunuous code, only .5 second burst as of today 3/31/2022

### 1/5 — Plays for a fraction of a second

*2021-05-14*

I opened the app, went through the quick easy menus, and then hit start, only to get a VERY quick burst of LTC sound output, then it stops. Seems like a bug that needs fixing, and then I can update the review and rating!

### 1/5 — Does not work!

*2020-02-05*

Tried this app and it does not work. In the sample screen grabs it shows options to select the frame rate. In the actual app that screen is blank! It deserves zero stars!

## Frequently asked questions about LTC

### What is LTC-Generator used for?

LTC-Generator creates SMPTE linear time code, which is used to label individual frames of video or film. This audio output is designed to control video playback on another device, not for human listening.

### Can LTC-Generator run in the background?

Yes, LTC-Generator can run in the background even when your device's screen is locked. This allows for continuous time code generation without interrupting other tasks.

### How can I output audio from LTC-Generator?

You can output the generated audio through your device's headphone jack, AirPlay, or Bluetooth. This provides flexibility in how you connect to your playback system.

### What are the differences between the free and full versions of LTC-Generator?

The full version of LTC-Generator allows you to set specific start and end times for the time code generation, with an option for automatic stopping. The free version starts from the current device time and stops at midnight or when manually stopped.

### Does LTC-Generator have ads?

No, LTC-Generator does not contain advertisements. The app is free to use with optional in-app purchases for advanced features.

### What frame rates does LTC-Generator support?

Both the free and full versions of LTC-Generator support a range of frame rates, including 23.976, 24, 25, 29.97, and 30 frames per second.

### What devices is LTC-Generator compatible with?

LTC-Generator is designed for iPhone, iPad, and iPod devices. It requires iOS 4+ and is available for devices running the latest version of the operating system.

### How often is LTC-Generator updated?

LTC-Generator was last updated on February 13, 2024, with version 3.4. This indicates a relatively active development cycle for the application.

## Version history (last 5 releases)

### 4.0 — 2026-04-28

Bugs fixed.
Remember settings.

### 3.4 — 2024-02-13

Removed non-standard frame rates which were not compatible with receivers.

### 3.3 — 2024-02-11

Bugs fixed.
Add 50 and 60 frame rates.

### 3.2 — 2023-09-12

Remember the last selected frame rate.

### 3.1 — 2023-09-06

Bug fixed.

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## More apps by Zhuoyao lu

- [Map Notes](https://appshunter.io/ios/app/map-notes/id6447806875)
- [FlashFlex](https://appshunter.io/ios/app/flashflex/id6502081911)

All apps by Zhuoyao lu: https://appshunter.io/developer/894406093

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*