# Chronograph Log

> Log bullet velocities and shooting data from your chronograph. (iPhone/iPad app by On-Core Software LLC.)

- Source: https://appshunter.io/ios/app/chronograph-log/id848380910 (this page in markdown: same URL + `.md`)
- Developer: [On-Core Software LLC](https://appshunter.io/developer/283621364)
- Category: Sports, Utilities
- Price: $3.99
- Rating: 4.00/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 22 MB
- Languages: American English
- Released: 2014-05-09
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/chronograph-log/id848380910/reviews.md

## What is Chronograph Log?

Chronograph Log was developed to record your bullet velocities, from your Chronograph, onto your iOS device.  No more writing everything down on a pieces of paper to be lost in your range bag.  When your friends ask about the loads you are using, you can pull out Chronograph Log and give them accurate info instead of guessing.  Send them an email or message on the spot.  Share your favorite loads via eMail, Facebook and more.

Chronograph Log was primarily developed for USPSA IPSC and IDPA, where Minor and Major Power Factors are very important.  It will color code those entries based on their velocities.  Note that the Power Factors can be ignored if you are tracking rifle loads or don’t care about Power Factors.

Note: This application is not a chronograph.  You will need to enter readings from your chronograph into the Chronograph Log app.

• Define: Bullets, Guns and Powder in the database.
• Record velocities for each round from your chronograph.
• Automatically calculate Average, Min and Max velocities.
• Color coding to show each velocity’s Power Factor.
• Export full tables to Mail.
• Export favorite loads to Messages, Mail, Twitter or Facebook.
• Backup / Restore to Dropbox.
• Bluetooth integration with Competition Electronics "ProChrono Digital" using their "Digital Link" module.

## Key features

- Record bullet velocities
- Define bullets, guns, and powder
- Automatic velocity calculations (Avg, Min, Max)
- Color-coded power factors
- Export data via email and social media
- Dropbox backup and restore
- Bluetooth integration with ProChrono Digital

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/chronograph-log/id848380910/reviews.md

### 4/5 — Very useful and powerful

*2014-08-16*

Love this app. Entering data was very simple and the results are very easy to understand. Well designed to handle multiple loads, guns, bullets, powders, etc. I wish the major/minor PF was an option though. I just entered "1" for rifle loading. Capturing data from a factory load is kind of clunky as well - I don't know the powder charge or type, but those are required. I linked my dropbox acct but I couldn't export anything to it. All around a very useful app to pair with a good chronograph.

### 3/5 — Not bad

*2014-07-14*

Simple to use. Pretty basic. I would like to see average muzzle energy added. This is primarily a computer to determine if a load makes power factor. $3.99 is a bit much for this one but it is the only one I could find. For this price I would expect ME calculation and possibly some graphs. The ability to turn off calculations not needed would be nice too.

### 5/5 — Must have for any Chronograph Owner

*2014-06-09*

I shoot several different calibers of pistols (.38 Special, 9mm, .40 S&W and .45 ACP) and normally write down the chronograph information on whatever scrap of paper I can find at the time which of course always gets lost between the range and the trip home. Now I use either my iPhone or iPad and log the chronograph runs and never have to worry about losing the data again. Being able to sync the chronograph data between my iPhone and iPad means I always have the data available and can share it with friends by exporting the chronograph data via email. Thanks for writing such a handy application!

## Frequently asked questions about Chronograph Log

### What is Chronograph Log used for?

Chronograph Log is used to record bullet velocities from your chronograph directly onto your iOS device. It helps you manage and analyze your shooting data, including power factors for competitive shooting.

### Does Chronograph Log work with any chronograph?

Chronograph Log records readings from your chronograph. It also features specific Bluetooth integration with the Competition Electronics "ProChrono Digital" using their "Digital Link" module.

### How much does Chronograph Log cost?

Chronograph Log is a paid application, priced at $3.99. There are no in-app purchases or subscription fees associated with its use.

### What devices is Chronograph Log compatible with?

Chronograph Log is available for iPhone, iPad, and iPod touch devices. It is designed for iOS operating systems.

### How often is Chronograph Log updated?

The latest version of Chronograph Log is 1.7, last updated on October 28, 2024. Updates are released periodically to improve functionality and compatibility.

### Can I share my shooting data with others using Chronograph Log?

Yes, Chronograph Log allows you to export full data tables via Mail. You can also share favorite loads directly to Messages, Mail, Twitter, or Facebook.

### Does Chronograph Log have ads?

No, Chronograph Log is ad-free. As a paid application, it does not contain advertisements, providing an uninterrupted user experience.

### What is the age rating for Chronograph Log?

Chronograph Log has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

## Version history (last 5 releases)

### 1.7 — 2024-10-28

Updated HUD.
Update for Dark Mode.

### 1.6 — 2021-08-14

Updated Dropbox API

### 1.5 — 2018-07-10

This app has been updated by Apple to display the Apple Watch app icon.

- Corrected major and minor velocity diplay calculations.
- Removed Dropbox Sync due to Dropbox dropping the service.
- Added Online Backup & Restore to Dropbox.
- iOS fixes.

### 1.4 — 2015-05-11

- Added support for Competition Electronics ProChrono Digital - "Digital Link" Bluetooth module.
- Removed confirmation dialog when canceling with no changes.
- Added ability to disable Power Factor.
- iOS 8 fixes.

### 1.3 — 2014-07-02

Fixed update for calculated values

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## More apps by On-Core Software LLC

- [On-Core Wordfind](https://appshunter.io/ios/app/on-core-wordfind/id285884423)
- [PictureFlip](https://appshunter.io/ios/app/pictureflip/id285884811)
- [SalesCalc](https://appshunter.io/ios/app/salescalc/id286366281)
- [On-Core Sudoku](https://appshunter.io/ios/app/on-core-sudoku/id287314682)
- [Wordfind Kids](https://appshunter.io/ios/app/wordfind-kids/id289277601)
- [Pachinko](https://appshunter.io/ios/app/pachinko/id303527165)

All apps by On-Core Software LLC: https://appshunter.io/developer/283621364

## Related topics

[chronograph log](https://appshunter.io/ios/topics/chronograph-log) · [chronographer](https://appshunter.io/ios/topics/chronographer) · [chronolog](https://appshunter.io/ios/topics/chronolog) · [athlon chronograph](https://appshunter.io/ios/topics/athlon-chronograph)

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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 2026-08-29.*