Comparison

BulletDrop+ vs TrueData

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • External ballistics calculation
  • iCloud support for load data
  • Store commonly used datasets
  • Selectable drag function
  • Selectable output units (inches, MOA, mils)
  • Fetch weather conditions
Features
Read full description

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!

About

TrueData

This app calculates ballistic data for rifles and bullets, factoring in weather and distance. It offers advanced features like muzzle velocity and BC truing, extensive bullet libraries, and customizable rifle and bullet profiles. Exportable trajectory tables and real-time weather integration enhance accuracy for shooters.

Highlights
  • Ballistic calculations
  • Real-time weather integration
  • Extensive bullet libraries
  • Customizable rifle and bullet profiles
  • Trajectory table generation
  • Muzzle velocity and BC truing
  • Spin drift calculation
Features
Read full description

Set up your rifles and bullets, refresh the weather and drag out your distance. Turret clicks are calculated on the fly and displayed instantly. Includes the full Sierra and Barnes bullet libraries and Doppler Data, plus: • Muzzle Velocity truing feature • BC truing feature • Barnes Doppler Library • Sierra Doppler Library • Multiple weather input options for any scenario or equipment • Elevation offset option for rifle zero • Intuitive, modern interface • Quickly dial in the wind and target distance • Calculates multiple click adjustments in MRAD or MOA • Supports combinations of metric and imperial • Supports ICAO and US Metro units • Supports G7, G1 and many other drag models • Supports either single, or up to 6 BC entries • Create and save your own rifles and bullets • Quickly view and duplicate bullets and rifles • Calculates spin drift • Retrieves weather at your location • Allows overriding temperature, humidity, air pressure • Automatically detects shooting angle (up/dn) • Generates trajectory tables showing zero and transonic zone • Ability to export trajectories as CSV/TSV/Pipe and PDF Report • Displays equivalent 1 MOA & MRAD when choosing distance • Displays equivalent 1 click of current scope at distance • Haptic feedback for positive button presses • Export your settings, rifles and bullets to Google Drive, DropBox, Email... • Import your settings, rifles and bullets to make switching devices easier • Add multiple distances to view a convenient Target Card • Connect your Bluetooth weather device for real-time changes (currently supports Kestrel, Skywatch and WeatherFlow) • Account for weather conditions while zeroing (Zero Weather) • Allow for variations in powder temperature with a simple interface • Allow for chronograph distance in bullet velocity • Fine tune your exact Wind Direction in a popup • Convenient Training Timer • Quick compass option in the Wind card • Virtual Range Finder estimates your target distance via GPS • Select basic or detailed form entry options in settings • Adjust your rifle's Scope Scale Factor • Round trajectories to your scope's clicks

Screenshots

BulletDrop+4 screens
TrueData4 screens

Verdict

The call

The clearest difference is review sentiment: TrueData at 100% against BulletDrop+'s 51%. TrueData also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 6). BulletDrop+'s advantage is ratings volume (76 vs 11) and iOS requirement (13.0 vs 15.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BulletDrop+ sells 6 one-off in-app purchases. TrueData asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

TrueData holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: BulletDrop+ has 76 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 51% of BulletDrop+'s written reviews are positive against 100% of TrueData's.

UpkeepUpdate frequency

BulletDrop+ ships an update every 4 months, TrueData every 4 weeks. The most recent releases landed on July 8, 2026 and August 15, 2026 respectively.

Scorecard7 real differences · 3 level
BulletDrop+ versus TrueData: the parameters behind the verdict, then further details
ParameterBulletDrop+TrueData
PriceFreeFree
Rating3.9 (76 ratings)5.0 (11 ratings) — better
Positive reviews51.4% of reviews100.0% of reviews — better
Number of ratings76 — better11
Update frequencyEvery 4 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size2 MB31 MB
Age rating4+17+
DeveloperMark DescalzoSierra Bullets LLC

Customer experience

BulletDrop+

All ratings76 ratings
Positive68.4%
Neutral13.2%
Negative18.4%
Written reviews74 reviews
Positive51.4%
Neutral18.9%
Negative29.7%

TrueData

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

BulletDrop+

One-time6
  • Chocolate Bar$0.99
  • Cup of Coffee$1.99
  • Doughnut$2.99
Show 3 more
  • Coffee-themed Beverage$4.99
  • Bag of Coffee$14.99
  • Sack of Coffee$29.99
None

TrueData

No in-app purchases

Questions

Is BulletDrop+ free?
BulletDrop+ is free to download, with in-app purchases available.
Is TrueData free?
TrueData is free to download, with no in-app purchases.
Which has better reviews, BulletDrop+ or TrueData?
TrueData is rated higher. BulletDrop+ averages 3.9 out of 5 from 76 ratings, while TrueData averages 5.0 from 11 ratings.
Do BulletDrop+ or TrueData have ads?
Neither BulletDrop+ nor TrueData shows ads.
Which is updated more often, BulletDrop+ or TrueData?
BulletDrop+ ships an update every 4 months, and TrueData every 4 weeks. Most recently, BulletDrop+ was updated on July 8, 2026 and TrueData on August 15, 2026.

Other comparisons