Zima vs LoadNode

The most comprehensive ballistic solver ever built — 200+ 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 FEATURES - Full ballistic calculator with trajectory tables - G1/G7 drag models with atmospheric corrections - Up to 3 rifle profiles with load data - Point blank range, effective range, and basic tools - Quick Solve mode for rapid field calculations - Automatic iCloud Drive backup with one-tap restore (free for everyone, no Pro gate) UPGRADE TO PRO ($19.99 one-time — no subscription) - 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 - Anti-materiel reference data, barrier penetration modeling Built by shooters, for shooters. Found a bug? Fixed within 48 hours. Want a feature? Submit it — we WILL build it.

LoadNode is a precision reloading companion: bench to target. Track every load you develop, enter chronograph velocities with live SD/ES, measure your groups from a photo, and compare your charges with honest uncertainty. FREE • Log rifles, recipes, and load jobs • Charge weight, seating depth and tuner position tests, with live SD and extreme spread • Offline bullet / powder / primer / brass component search • Measure a group from a target photo (size and MOA) • Session conditions with density altitude, entered from your meter or computed • Password-encrypted backup and restore PRO: one-time, yours forever (no subscription) • Unlimited firearms and multi-barrel profiles • Garmin Xero chronograph sync • Velocity and group-vs-charge charts, plus charge comparison with honest uncertainty • Composite analysis: pool groups into 20 to 50-shot statistics • Full target-cam: firing order, on-photo data box, share cards • Neck-tension and shoulder-bump tracking • AI group analysis, with chronograph velocity correlation and observation-based suggestions (technique and environment only, never load advice) • Cost and ROI tracking: per-round cost and return vs factory ammo • Cloud sync and cloud photo backup across your devices • Personal records, medals and a season recap • Recipe versions, reports and the Load Book PDF • Throat-erosion tracking, saved groups, advanced metrics (mean radius, point of impact, scope clicks) and annotated image export An account is optional. Logging, the calculations, group measurement and component search all work offline. Weather autofill, sign-in, purchases, AI analysis and cloud sync need a connection. Handloading is an adult activity. LoadNode is a logbook, not load data: it never tells you what powder or charge to use. Always use current published data and work up safely.