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JumpStart LTC

By Edward Richardson

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JumpStart LTC generates Longitudinal Time Code to provide a convenient interface for setting dedicated timecode devices.

Many timecode devices, as robust as they are, often have no way to manually set the time – and if they do, it usually involves pesky dip switches or something similar. Some start at Hour 0 each time they are powered up, with no way to resume a previous timecode.

But with JumpStart LTC you can quickly set time code and userbits!

Plug an 1/8" headphone cable into your iPhone or iPod touch and the other end into the "TimeCode In" of your timecode device (with proper connector as necessary). Press "Start" or "Time of Day," and adjust the volume. Your device will jam sync to JumpStart LTC. Quit JumpStart, detach the cable, and put your iPhone or iPod touch away.

Seconds after launch you are ready to roll sound! Easier than JumpStarting your car!

•30 drop-frame
•30 non-drop
•29.97 drop-frame
•29.97 non-drop
•25 fps
•24 fps
•23.98 fps

•Sound Devices

JumpStart LTC is not intended to serve as a master clock.

What's New in Version 1.0.2

-tested on iOS 4
-timecode displayed in large type in landscape orientation
-calibrations for iPhone 4 hardware
-updated help page

iPhone Screenshot

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Customer Reviews


I really love this app and it works great.
Ever since I updated to iOS 8 and iPhone 6 it launches but it freezes when you try to actually play timecode.

I got a super quick response from the developer (about 10 minutes!) that the workaround for ios8 is to quit the app, relaunch, go to settings, turn off 'volume warning'. Worked perfect.


I decided to buy this app because I recently purchased a Sound Devices 552. I use Deneke SB3 boxes on the cameras and to slave timecode to the 552. Just need need a standard 1/8in mini cable. Just one button sets time of day TC and puts the date in the user bits. It saves me several minute each morning. Great app!!! (minus 1 star because its a bit too expensive in my opinion)

Cool App!

I just needed a straight forward timecode generator. This worked like a charm and is very easy to use.

JumpStart LTC
View In iTunes
  • $19.99
  • Category: Photo & Video
  • Updated:
  • Version: 1.0.2
  • Size: 0.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 3.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: