Caldwell Ballistic Chronograph

Battenfeld Technologies

About this app

The Ballistic Chronograph app is for use with the Caldwell line of Ballistic Chronographs supporting a 3.5mm (TRRS) line-out serial port.

For best performance - make sure your device is up to date with the latest software updates provided by your manufacturer and/or carrier.


If you are unable to connect your Android device to the chronometer follow these instructions:



With the audio cable disconnected at both ends…


1. Connect the audio cable to the Android device

2. Connect the audio cable to the Chronometer

Chrono USB Support (v. 1.24+)

NOTE: Not all devices support USB. To test if your device has USB support - download and run USB Host Diagnostics by Chainfire from Google Play.

A USB 2.0 A-Male to B-Male Cable + a USB On-The-Go Connector is required. These cables can be purchased through Amazon.com, Radio Shack, and other retailers.

When prompted to Allow the app Chronograph to access the USB device - Select OK.

If you do not see a prompt - check your connection and try again.

If you are unable to connect the device - Please ensure your device has USB support.

Ratings and reviews

If you have a android phone you have to manually go into the settings and give it all the permissions needed as the install and app dont ask or set any of them. Got to settings->apps, then touch the 3 dots and select app permissions. I went thru each permission and if this app was listed I turned on the permission. You particularly need microphone on to connect to the chrono. And location services if you change the apps setting from zip code. And storage access to save data. I had to tape the microphone connector to the phone as the jack doesnt quite go all the way in and would lose connection at the slightest bump e en with the case off.

!IMPORTANT! Permissions need to be turned on in order for this app to work. The App does not ask when it is installed like most Apps do, so you need to go to the App Manager and turn on permissions for the Microphone and Storage. The App will not initialize without granting these permissions. I'm sure all the bad reviews are from folks who just try to run it as installed, without manually granting permissions to the Microphone and Storage. I can tell nothing happens. I even called Tech Support and spent lot of time on the phone trying to get it to connect with no joy. Even Tech Support doesn't know this little permissions tip (provided by another reviewer -Thank you very much!). There is also a specific procedure required for a good "Sync". Step 1) Start with the App running and the Chronograph ready to record a shot. Step 2) Connect the cable to the Android Device first, then connect it to the Chronograph. At this point the Android Device should display "Synced" and you are ready to start a new Group. If not tap the menu icon at the top right and select "Reset COM". Once Permissions are granted and a Sync is established, the app works exactly as advertised. Now go out there and enjoy it!

It's a simple yet functional app to go with a simple yet functional chronograph. It took me a while to get my galaxy 6 to sync with the chronograph. The instructions are are a bot misleading, stating that iOS users need to enable the microphone permission but that other phones should be fine. When I couldn't get things to sync I enabled the microphone permission and it syncs fine now. The app does everything that I need and even a bit more when the "show more" feature is enabled.

What's new

Version 1.48 contains the following changes/updates:
• Android 13+ support.