BulletDrop+ vs Caldwell Precision Chronograph
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BulletDrop+
Calculate bullet trajectory, energy, and drift with precise inputs. Store custom loads, fetch weather data, and choose output units for accurate shooting predictions. Ideal for handloaders and shooters to understand cartridge performance.
- External ballistics calculation
- iCloud support for load data
- Store commonly used datasets
- Selectable drag function
- Selectable output units (inches, MOA, mils)
- Fetch weather conditions
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A simple, easy to use external ballistics calculator. It accepts inputs of bullet weight, ballistic coefficient, muzzle velocity, sight height, zero range, wind speed & angle, etc and calculates velocity, energy, flight path, and drift. Features: * iCloud support. Store load data on iCloud and have it available on all your iCloud-enabled iOS devices. * Clean & simple user interface. * Store commonly used datasets. * Selectable drag function for ballistic coefficients calculate based upon models. * Selectable output units: inches, MOA, & mils. * Selectable max range and range increments under Settings. * Fetch weather conditions for your location. BulletDrop+ is intended for hand loaders and shooters of all varieties. It give them an idea what various cartridges and load recipes will do at the range. As alway, the information provided by BulletDrop+, or any other calculator, is no substitute for actual range time. Get out and shoot!
Caldwell Precision Chronograph
This app connects to Caldwell Ballistic Chronographs via serial port or Bluetooth to record and display shot data. It requires specific microphone, camera, and Bluetooth permissions for full functionality on iOS devices.
- Connects via serial port
- Connects via Bluetooth (Chrono G2)
- Records shot data
- Displays shot data
- Requires microphone access
- Requires camera access
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The Ballistic Chronograph app is for use with the Caldwell line of Ballistic Chronographs supporting a 3.5mm line-out serial port. Users running iOS 7 or greater • When prompted “Caldwell Ballistic Precision Chronograph” Would Like to Access the Microphone - select OK. • Please ensure that Settings -> Privacy -> Microphone -> Caldwell Ballistic Precision Chronometer is enabled (Access Granted). Running the app with the setting disabled will result in no shots being seen even though the app is showing it as connected. Users running version 1.14 or greater • When prompted “Caldwell Ballistic Precision Chronograph” Would Like to Access the Camera - select OK. • When prompted “Caldwell Ballistic Precision Chronograph” Would Like to Access Photos - select OK. • Please ensure that Settings -> Caldwell Ballistic Precision Chronometer -> Camera is enabled (Access Granted). Chrono G2 users running 1.17 or greater To enable Bluetooth in the app. In the Chrono Settings - set Bluetooth enabled. If prompted - Turn on Bluetooth to Allow "Caldwell Ballistic Precision Chronograph" to Connect to Accessories. Select Settings. Turn on Bluetooth. If prompted - Bluetooth is not enabled. Enable Bluetooth to continue. In Settings - Turn on Bluetooth.
Screenshots
Verdict
The clearest difference is rating: BulletDrop+ at 3.9 against Caldwell Precision Chronograph's 2.3. BulletDrop+ also leads on review sentiment (51% vs 23%). Caldwell Precision Chronograph's advantage is in-app purchases (none vs 6) and update cadence (monthly vs every 4 months). On price, ratings volume, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. BulletDrop+ sells 6 one-off in-app purchases. Caldwell Precision Chronograph asks for nothing beyond the download.
BulletDrop+ holds the better App Store score, 3.9 against 2.3. Both are backed by a comparable volume of ratings — 76 and 191 respectively. Written reviews point the same way: 51% of BulletDrop+'s written reviews are positive against 23% of Caldwell Precision Chronograph's.
BulletDrop+ ships an update every 4 months, Caldwell Precision Chronograph monthly. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.
| Parameter | BulletDrop+ | Caldwell Precision Chronograph |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (76 ratings) — better | 2.3 (191 ratings) |
| Positive reviews | 51.4% of reviews — better | 22.9% of reviews |
| Number of ratings | 76 | 191 — better |
| Update frequency | Every 4 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 7 MB |
| Age rating | 4+ | 17+ |
| Developer | Mark Descalzo | Battenfeld Technologies Inc |
Customer experience
BulletDrop+
Caldwell Precision Chronograph
Bugs and requests
BulletDrop+
Not enough reviews yet to summarise bugs or requests.
Caldwell Precision Chronograph
Reported bugs
5 issues- Doesn't work on iPhone 7 and newer
- Crashes on iOS 16 update
- Bluetooth and wired connections not reliable
- Weather data not working
- App freezes or closes unexpectedly
Requested features
4 requests- Export data to CSV
- Sync data across devices
- Improve bullet/load data management
- Add more weather/environmental data tracking
In-app purchases
BulletDrop+
- Chocolate Bar$0.99
- Cup of Coffee$1.99
- Doughnut$2.99
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- Coffee-themed Beverage$4.99
- Bag of Coffee$14.99
- Sack of Coffee$29.99
Caldwell Precision Chronograph
No in-app purchases
Questions
Is BulletDrop+ free?
Is Caldwell Precision Chronograph free?
Which has better reviews, BulletDrop+ or Caldwell Precision Chronograph?
Do BulletDrop+ or Caldwell Precision Chronograph have ads?
Which is updated more often, BulletDrop+ or Caldwell Precision Chronograph?
Other comparisons
