Trajectory vs Zima

Detects the trajectories of shapes moving along a parabolic path

The most comprehensive ballistic solver ever built — 130+ features in one app. Independently verified against JBM Ballistics reference data. Four solver models (3DOF, 4DOF, 6DOF, Pejsa), nine drag models, and every correction factor known to ballistic science — validated with a 96-test physics suite. Built for precision shooters, competitive marksmen, hunters, handloaders, and trained professionals who demand accuracy at every distance. FREE ON THE SAMPLE RIFLES, PRO FOR YOURS - Calculate and every tool that solves a shot work free on five sample rifles, with your own weather, wind and range - Add all your own rifles, optics, ammo and suppressors free, with no limit - Bullet, cartridge, reticle and target libraries to look through - Logs, trackers and the quick calculators - Automatic iCloud Drive backup with one-tap restore (free for everyone) PRO: EVERY TOOL ON YOUR OWN RIFLES (Lifetime $19.99, or 6 months $14.99 — one payment, nothing renews. Try it free for 7 days, once.) - All four solver models (3DOF, 4DOF, 6DOF, Pejsa) - 3,600+ bullet and cartridge database - Interactive 3D trajectory visualization - WEZ hit probability analysis (Monte Carlo) - PDF range cards, CSV/XLS export, DA Form 5517 - GPS target ranging on real-time maps - Device barometer and camera inclinometer - Bluetooth: Kestrel, rangefinders, chronographs - Competition mode with PAR timer - Night-vision HUD mode - Apple Watch calculator and wind calls - Home Screen widgets and Live Activities - Training modes (range and wind estimation) - TAK/ATAK tactical network integration - DOPE book, cold bore tracking, barrel life - Ammo inventory, suppressor profiles - Reticle simulator with 400+ reticles + DIY reticle creator - And 100+ more tools WORKFLOW HUBS - Range Day — session planner, live shot tracker, trend analysis - Armory — inventory for rifles, optics, mounts, suppressors; maintenance logs, per-optic zero history - Hunting — hunt planner, hunt log, trophy records, GPS scouting - Competition — match planner, live score tracker, stage breakdown, hit-rate trends - Military / LE — mission planner, TAK broadcast, encrypted CoT storage (Pro Acknowledgment required) - Analysis — cross-suite dashboard, predicted vs actual DOPE drift detection - AI Insights — on-device AI via Apple Foundation Models (iOS 26 + iPhone 15 Pro), rule-based fallback on older devices. No data leaves your phone RELOADING SUITE - Develop — ladder tests with R² regression, OCW node detection, optimal-charge markers - Track — per-lot ammo, powder, primer, bullet, brass - Test — chrono session manager, MV statistics (SD, ES, CV), outlier flagging - Records — Saved Load library tying rifle, brass, primer, powder, bullet, OAL/CBTO - Reference — cartridge, brass, primer, powder databases - 24 visibility toggles with 4 layout presets RANGE SCHOOL — LONG-RANGE TRAINING - 61 drills across 6 pillars: Marksmanship, Positions, Wind Reading, Range Estimation, Scope/Optics, Equipment - 290-term searchable glossary, quiz mode with flashcard review - Failure-analysis library: common mistakes diagnosed by symptom - Two training plans: First 30 Days (beginner) + PRS Prep 12-Week BALLISTIC ENGINE - Spin drift, Coriolis, aerodynamic jump, Magnus effect - Gyroscopic stability (Sg), per-load temperature sensitivity - Cant angle correction across all solvers - Transonic/subsonic detection, multi-step BCs - Custom drag curves (CSV, Lapua Doppler), zero-atmosphere BC correction FIELD READY - Offline topo maps with range/bearing HUD - Historical weather auto-fill via WeatherKit - Camera inclinometer, device barometer, GPS auto-fill - Profile QR code sharing PROFESSIONAL USE - TAK/ATAK server integration (CoT, GeoChat) - MGRS coordinate conversion, DA Form 5517 range cards - Barrier penetration reference data Built by shooters, for shooters. Found a bug? Fixed within 48 hours. Want a feature? Submit it — we WILL build it.