BalTrak
SL EN DE IT CS

BalTrak

Professional ballistic calculator for hunters, shooters and competitors.
G1/G7 · Coriolis · spin drift · trueing · 15 preset profiles.

// zero tests. zero regrets.

BalTrak turret dial view — default app screen
BalTrak trajectory curve
🍎 App Store 📱 Google Play

// Features

BalTrak combines classic external ballistics with the advanced corrections usually reserved for expensive commercial calculators — in a simple, free package.

🎯

Precise ballistics

G1 (McCoy) and G7 (Litz) drag models. Euler integration with 0.2 ms step.

  • Up to 2000 m range
  • Atmospheric corrections
  • Subsonic / supersonic support
🌍

Coriolis + spin drift

Azimuth-dependent Eötvös correction for long ranges + Litz empirical spin drift formula.

  • Set latitude + firing azimuth
  • Right and left twist supported
  • Gyroscopic stability factor
⚙️

Trueing

Automatic BC correction computed from 2+ field POI measurements.

  • Golden-section search in [0.75, 1.25]
  • Residuals displayed
  • Saved in profile
🎨

Turret dial view

Round scope turret with all distances as dots at their actual click angle.

  • Dope card next to dial
  • Classic trajectory curve also available
  • Multi-turn ring for ELR
📚

15 preset profiles

Main calibers: .22 LR to .338 Lapua Mag, plus 9mm and .45 ACP.

  • Sako 85, Tikka T3x, Blaser R8, AI AX/AWM …
  • Kahles, S&B, Nightforce, Leupold …
  • Lapua, Hornady, Berger, Sierra bullets
⚡

Live recalc

Chart, table and turret refresh instantly on every parameter change.

  • No more "Calculate" button
  • Euler compute < 20 ms
  • Responsive on mobile
⏱️

Chrono log

Enter measured v₀ readings from Garmin Xero, LabRadar, MagnetoSpeed; the app computes average, SD and ES live.

  • Optionally override factory v₀
  • Sample SD (n−1, Bessel)
  • m/s or fps input, auto-converted
📄

PDF export

Branded A4 sheet with the trajectory table — paper reference on the range without the phone.

  • Clicks column for direct dialing
  • Profile info in header
  • SL / EN / DE localized columns
🔒

Offline + privacy

Works without internet. No analytics, no ads, data never leaves the device.

  • Local SQLite
  • JSON bullet import / export
  • Five languages: SL, EN, DE, IT, CS

// Views

Turret dial as the default view — ideal for quick scope dialing on the range.

Turret dial with distances
Turret dial + dope card Default view with distances as dots at their click angle.
Shooting profiles list
Shooting profiles 15 preset setups for main calibers + your own.
Trueing dialog
Trueing from measurements Auto-calc BC correction from 2+ POI measurements.
Trajectory table
Trajectory table Velocity, energy, time of flight, POI, MOA, MIL, clicks, wind.
Settings: Coriolis + spin drift
Advanced settings Coriolis (lat, azimuth), spin drift (SG, twist direction).
About + donate
Support development Donation is voluntary and does not unlock any features.

// Technical

What you get under the hood.

DRAG MODEL
G1 (McCoy) + G7 (Litz)
INTEGRATION
Euler, dt = 0.2 ms
MAX RANGE
2000 m
BULLET LIBRARY
333 factory + custom
PROFILES
15 presets + custom
LANGUAGES
SL · EN · DE · IT · CS
PLATFORMS
iOS · Android
LICENSE
Free for personal use

// Download

The app is free. Pick your platform.

🍎 iPhone · iPad

Scan the QR or tap the button — automatic updates.

App Store QR code for BalTrak
App Store →

📱 Android

Scan the QR or tap the button — automatic updates.

Google Play QR code for BalTrak
Google Play →
⚠ Disclaimer. Calculations are mathematical simulations of external ballistics. Real-world results always require field verification. The user is responsible for safe and lawful handling of firearms and compliance with local regulations. BalTrak is not a substitute for proper training.