Cut the Cord!

This app is designed to be used in conjunction with the ProChrono Digital chronograph (model CEI-3800) and the Digital Link Bluetooth accessory (model CEI-3812) OR the ProChrono DLX (CEI-3820). It provides a modern user interface for controlling the chronograph as well as collecting and managing the velocity data. Now you can connect wireless to your chronograph using a tablet or smartphone!

Whether you are interested in testing your loads or your shooting skills for speed and consistency, Competition Electronics has a product to suit your needs. We have been producing quality shooting products in the USA since 1982. Our goal is to provide a long lasting product that is serviceable and affordable.

What’s New

Version 1.7.2

- Fixing problem with importing backups

Ratings and Reviews

3.5 out of 5
20 Ratings

20 Ratings

rkhyp1 ,

Good but not competitive

Good basic functionality, but missing features Caldwell has - pictures, group size finder, etc

There are two kinds of Chrony owners - those that have shot their chronograph, and those that will someday. If I join the first group I'll get a different one

Rod Palmer2 ,

Glad I purchased from Competition Electronics!

Works great for me. Setup was easy. I shoot outside in good weather so I have never experienced problems with reading shots as some indoor shooters might. Always runs fine using Bluetooth on my iPhone. I use it about once a week. It’s consistent and reliable.

Absolutely LOVE the new feature where I can attach a picture to the string. Now I can have my groups in digital format in the same place as my data. Thank you for listening to user feedback!! This app just rocks.
Thanks again!

Breakinthings ,

Works pretty well, could be improved

This app is pretty good overall and paired with the DLX it’s a nice upgrade from the older model Digital.

A couple improvements would help the app:
- allow a choice to show ft-lb energy instead of power factor. Many users of this chrono are not competitive pistol shooters and don’t care about power factor, but displaying avg energy in the results page might be useful
- allow grouping shot strings by firearm or cartridge

App Privacy

The developer, Competition Electronics, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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