Comparison

BulletCalc3 vs FlightDose

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

Head to head
About

BulletCalc3

Calculate ballistic trajectories for firearms with detailed charts and data. Offers metric and imperial units, automatic calculation of bullet drop, energy, and velocity at various ranges. Includes features for adjusting gun sight zero and measuring slant angles.

Highlights
  • Metric/Imperial unit support
  • Dynamic ballistic charts
  • Automatic FPS/Energy/Drop calculation
  • Gun sight zero adjustment
  • Slant angle measurement
  • Web search for bullet specs
  • Export distance data
Features
Read full description

Calculate your Ballistics like a Pro! BulletCalc3 does it all.....Metric / Imperial / or Metric AND Imperial!! Generate Dynamic Ballistic CHARTS w/ "GRAPH DATA" Button -> also featuring Ranges of 100 yards / 200 yards / 300 yards / & 500 yards! **Gravity on Earth is Very Reliable & Limits the Distance a Heavier-than-Air Object Can be Thrown at a Given Speed -> Throwing FARTHER requires Throwing FASTER & Sometimes HIGHER -> Evaluate your FORWARD PASS w/ BulletCalc3 & Develop an Arm like a Cannon!!!......or Just Evaluate a REAL Cannon!! BulletCalc3 will Automatically Calculate FPS / Bullet Energies / Bullet Drop due to Gravity at 100 / 200 / 300 / 400 / 500 / 1000 yards!!! *note: the Aerodynamic Drag Coefficient Used is Exclusive to BulletCalc3, and may vary from Published Values.   ++ Aerodynamic Drag Values can be Calibrated or Fine-Tuned using Trajectory Data Published on Ammunition Boxes....or also via Range Observations w/ Chronograph & Bench Mount -> Resulting in Improved Ballistic Model Performance at ANY Distance ++ Sound Barrier Turbulence & Bullet Shape Related Aerodynamic Fluctuation are Known Phenomenon affecting ALL Ballistic Calculators -> BulletCalc3 utilizes Simplicity as the Best Approach for Minimizing Model-to-Measurement Variation in FAST Smartphone Based Ballistic Calculation Don't know what the specs on that Bullet Cartridge are? Use the "Web Search" button to pull up all of the information you're missing right from the Shooting Range Calculate Instantaneous Velocities and Energies at any Range Distance you want to! Now you're the Expert!! -Located in "GRAPH DATA" >>> MOA [Minute of Arc] -> mrad [milliradians] -> Gun Sight ZERO Setting [yards] -> Yards / mil & Meters / mil **to Adjust Gun Sight ZERO -> [Press "CHANGE UNITS" Button] -> [Scroll to Bottom] -> [Adjust Value] -> [Press "SAVE UNITS"] >>> Gun Sight ZERO sets Parabolic Gravitational Arc by using Raw MUZZLE Velocity as a Horizontal Vector -> Slower Speeds w/ Longer Gun Sight ZERO = Taller Parabolic Arc *which Corresponds to Higher Firing Angle -"RIFLEMAN'S RULE" & Tiltmeter Accelerometer Feature -> Located in "Change Units" MENU **Easily measure Slant ANGLE of a Hill & Automatically Calculate Rifleman's Horizontal Distance from Slant Range Laser Rangefinder Value ***Pressing "EXPORT Distance" Button Updates the Bullet Drop Calculation & Dataset -INTERACTIVE TextField to Ballistic Charts "GRAPH DATA" Feature -> Calculation Parameters Description **this GRAPH Description Auto-Populates when "CALCULATE" Button is Pressed or CALIBER is Selected from MENU ***Description Data Includes -> Caliber Information / Muzzle Velocity / Projectile Mass / Aerodynamic Drag Coefficient -> [Tap "CALCULATE"] or [Select a CALIBER from MENU] -> [Tap "GRAPH DATA"] -> [Scroll Down to CHART DESCRIPTION Text Field below TOP GRAPH] -> [Modify DESCRIPTION as Desired] -GRAPH Description Feature -> Copy-Paste-to-Clipboard **to COPY Ballistic Parameters: "Tap mrad [milliradians] -> MOA [Minute of Arc] -> yards / mil" -> Text will Flash RED ***PASTE Clipboard -> to Notes, Text Messages, Email, etc >>> to Describe Ballistic CHART

About

FlightDose

Estimates cosmic radiation exposure during flights using scientific aviation modeling. It calculates dose based on route, altitude, latitude, and solar conditions, presenting clear, data-driven insights into an invisible environmental factor.

Highlights
  • Estimates in-flight radiation dose
  • CARI-7 based modeling concepts
  • Accounts for altitude and position
  • Considers Earth's magnetic field
  • Supports route and flight estimation
  • Clear results presentation
Features
Read full description

How much radiation did your last flight expose you to? Find out... FlightDose is a scientific aviation tool for estimating exposure to cosmic radiation during flight, based on established aerospace radiation modeling principles. At its core, FlightDose leverages methodologies derived from CARI-7, a widely recognized aviation radiation dose model developed for analyzing radiation exposure at altitude. By combining route geometry with altitude, latitude, geomagnetic shielding, and solar conditions, FlightDose provides informed estimates of in-flight radiation dose in a clear, modern interface. Cosmic radiation increases rapidly at cruising altitudes and varies significantly by latitude and flight path. FlightDose makes this invisible environmental factor understandable using real aviation physics and data-driven calculations. What FlightDose does • Estimates in-flight radiation dose using CARI-7–based modeling concepts • Accounts for altitude, geographic position, and Earth’s magnetic field • Supports route-based and flight-based dose estimation • Presents results clearly without unnecessary complexity Who it’s for • Pilots and aircrew • Frequent flyers • Aviation professionals and students • Engineers, researchers, and science-focused travelers • Anyone curious about estimating radiation dose during flights Important information FlightDose is provided for informational and educational purposes only. It is not endorsed by the FAA and does not provide medical advice, diagnosis, or risk assessment. All dose values are estimates and should not be used for clinical, regulatory, or occupational decision-making. FlightDose Premium is available as an auto-renewing subscription: • Monthly: $4.99/month • Annual: $49.99/year Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ FlightDose Terms of Service: https://apextechnologygroup.io/policies/flightdoseTOS.html Privacy Policy: https://apextechnologygroup.io/policies/flightdose.html

Screenshots

BulletCalc34 screens
FlightDose4 screens

Verdict

The call

The clearest difference is price: FlightDose at Free against BulletCalc3's $0.99. FlightDose also leads on rating (5.0 vs 3.0) and update cadence (every 4 days vs every 2 months). BulletCalc3's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

FlightDose is free to download; BulletCalc3 costs $0.99 up front. FlightDose sells 1 one-off in-app purchase. BulletCalc3 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FlightDose holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 7 respectively.

UpkeepUpdate frequency

BulletCalc3 ships an update every 2 months, FlightDose every 4 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard8 real differences · 2 level
BulletCalc3 versus FlightDose: the parameters behind the verdict, then further details
ParameterBulletCalc3FlightDose
Price$0.99Free — better
Rating3.0 (2 ratings)5.0 (7 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings27 — better
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size6 MB14 MB
Age rating17+12+
DeveloperJack McCormackApex Technology Group, Inc

Customer experience

BulletCalc3

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

FlightDose

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

BulletCalc3

No in-app purchases

1 purchases

FlightDose

One-time1
  • Remve Ads$2.99

Questions

Is BulletCalc3 free?
BulletCalc3 costs $0.99, with no in-app purchases.
Is FlightDose free?
FlightDose is free to download, with in-app purchases available.
Which has better reviews, BulletCalc3 or FlightDose?
FlightDose is rated higher. BulletCalc3 averages 3.0 out of 5 from 2 ratings, while FlightDose averages 5.0 from 7 ratings.
Do BulletCalc3 or FlightDose have ads?
FlightDose shows ads; BulletCalc3 does not.
Which is updated more often, BulletCalc3 or FlightDose?
BulletCalc3 ships an update every 2 months, and FlightDose every 4 days. Most recently, BulletCalc3 was updated on October 13, 2026 and FlightDose on October 7, 2026.

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