How this comparison was built.
The GS Ballistic Suite column is read directly from this app's own
source code as of v4.7.34 (October 2026). The Applied Ballistics/Kestrel,
Strelok Pro, Hornady 4DOF and GeoBallistics (BallisticsARC)
columns are based on each vendor's public product documentation,
app-store listings and support pages as of August–September 2026 — not
hands-on, side-by-side testing. Competitor products change over
time, and where public documentation didn't clearly confirm a
capability we've marked the cell "not confirmed in public docs"
rather than guess. Treat close calls ("tie") as directionally
correct rather than lab-verified. If something below looks out of
date, let us know at
support@gsbs.co.za and
we'll correct it. "Strelok Pro" here means the original app by
Igor Borisov, not Strelok LLC's newer, unaffiliated "Strelok
Pro-Ballistic Platform". Sources consulted are listed at the bottom of
this page.
01. Drag modeling
How each platform models the bullet's actual deceleration, not just a single BC number.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Standard G1 / G7 BC |
tie |
Yes | Yes | Yes | Yes — built-in BC calculator | Yes |
| Multi-BC velocity bands2–3 BCs, switching by velocity threshold |
tie |
Yes | Not needed — measured curves replace it | Yes | Not needed for Hornady bullets — Doppler curves replace it | Not confirmed in public docs |
| User-supplied Cd(Mach) curvepaste your own drag table |
tie |
Yes (CDM) | No — closed library, no user paste | Yes | No — closed proprietary curve library, no user paste | No — standard BC-based calculator, no published curve-paste feature |
| Radar-measured drag libraryper-bullet curves from real Doppler data |
them |
None | Yes — large proprietary library, this is AB's core product | Partial — Lapua-published curves, Lapua bullets only | Yes — Doppler-measured Hornady Bullet Files, this is 4DOF's core feature | No — standard BC-based bullet library, not measured drag curves |
| Rimfire-specific curve (RA4).22 LR subsonic/transonic fit |
us |
Yes, default for rimfire | Only 2 measured loads (Center X, Midas+), no generic curve | Yes, selectable | No rimfire-specific curve found in public documentation | No rimfire-specific curve found in public documentation |
| Transonic entry / Mach-crossing rangeflags where flight regime changes, not just a raw drop table |
tie |
Yes — Ballistic Solver's Velocity / Flight Profile re-samples the same trajectory solver past the target and reports the estimated Mach 1.30 / 1.20 / 1.00 crossing distances alongside a velocity/Mach/flight-state table | Yes — Range Card flags the range where the bullet enters the transonic zone with an asterisk, built on AB's radar-measured drag library | Not confirmed in public docs as a distinct flagged indicator, beyond a customizable trajectory table | Not confirmed in public docs as a distinct flagged indicator, though 4DOF's Doppler-measured curves are built around transonic/subsonic accuracy generally | Not confirmed in public docs |
| Bullet / factory-ammo databasepublished BC & MV lookup by product name |
tie |
Yes — built-in catalog, 1,392 centerfire entries across 61 calibers plus 70 rimfire entries across 6 calibers and a 306-entry PCP pellet/slug catalog across 21 manufacturers; manual entry still available for anything not listed | Yes, large curated library | Yes, large built-in database | Yes — full Hornady ammo line + Bullet Files | Yes — 2,500+ bullet library |
| BC from measured velocity losssolve BC / drag from chronograph readings downrange |
us |
Yes — Velocity Loss BC Calculator: up to five downrange readings, drag model set by the rifle's platform (RA4 rimfire, G1 PCP, G7 centerfire), one BC fitted to all readings with per-reading misses, plus per-segment Multi-BC or drag-scale results; imports chronograph-app CSV/Excel exports and exports a one-page PDF report; saves straight to the rifle's load | Not confirmed in public docs — AB Quantum's documented truing works from observed drop (MV Calibration, DSF); its chronograph link captures muzzle velocity | Not confirmed in official docs — the official feature list derives BCs from observed elevations (drop); airgun users report working out pellet BCs from two chronograph readings | Not confirmed in public docs — its BC Calculator is a conventional BC-based solver, not a velocity-loss solve | Not confirmed in public docs — official truing is Muzzle Velocity Truing "without a chronograph" |
02. Trajectory corrections
Effects layered on top of the base drag solution.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Spin drift |
tie |
Yes | Yes | Yes | Yes | Yes |
| Coriolis |
tie |
Yes | Yes | Yes | Yes — modeled as "Earth-Based Effects" | Yes |
| Aerodynamic jump |
tie |
Yes — Litz's published model (off by default) | Yes | Unclear / limited in published docs | Yes — Hornady states 4DOF was the first publicly available program to calculate it | Yes — modeled as crosswind jump |
| Powder-temperature MV sensitivity |
them |
Yes — opt-in, up to three chronographed temp/velocity points with piecewise-linear interpolation, no built-in powder library | Yes | Yes | Yes — Temperature Sensitivity Factor with a tested-powder library | Yes — MV-vs-temperature provision |
| Range-based wind zonesdifferent wind per distance band |
tie |
Yes, plus a windspeed/altitude gradient model | Yes, multi-zone wind | Partial — simpler segmented wind | Not confirmed in public docs | Not confirmed in public docs |
Where temperature, pressure, humidity, and wind actually come from.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Phone GPS + internet weatherno extra hardware needed |
tie |
Yes (Open-Meteo) | No — needs the physical meter | Yes | Not confirmed in public docs — built around Bluetooth meter input | Yes — GPS-based atmospherics/rangefinder built into the app |
| Bluetooth weather-meter integrationreal device protocols, not just readings |
tie |
Yes — Kestrel, Calypso, WeatherFlow | Is the meter itself | Yes — Kestrel, Skywatch BL, Kestrel DROP, WeatherFlow | Yes — Kestrel 5500+ / WeatherFlow | Yes — Kestrel LiNK-enabled meters |
| Standalone weather-sensor hardwareworks with the phone left in a pocket |
them |
No | Yes — direct on-site instrument | No | Yes — bundled Kestrel 5700 Hornady Weather Meter | No standalone hardware confirmed in public docs |
| Manual weather entry |
tie |
Yes | Yes | Yes | Yes | Yes |
04. Shot geometry
Angle, cant, direction of fire, and getting range without a rangefinder.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Shot-angle / cant capture |
tie |
Yes — camera aim overlay + gyroscope, live lock | Yes — hardware inclinometer | Yes — phone tilt sensor | Not confirmed in public docs | Yes — phone sensors (HUD / Map modes) |
| Rifle-mounted Bluetooth cant sensorlive cant from a device on the rifle, not the phone |
us |
Yes — SG Pulse (Shooters Global) live cant indicator with adjustable allowed-cant tolerance, plus a shot timer (onboard on a Pro unit, phone-run on a standard Pulse) | Not confirmed as shipped — Shooters Global lists an AB Quantum integration for SG Pulse Pro as in progress | Not confirmed in public docs — official Bluetooth support covers rangefinders and weather meters | Not confirmed in public docs | Not confirmed in public docs |
| True vs. magnetic northdeclination accuracy |
tie |
Yes — full WMM (NOAA-coefficient model), on by default with a GPS fix; falls back to a country-average table without one | Yes — precise electronic compass + AB software | Typically basic | Uses connected Kestrel or phone compass; WMM-grade declination not confirmed in public docs | Choice of Kestrel or phone compass; declination accuracy not detailed in public docs |
| Laser rangefinder Bluetooth integration |
them |
None | Yes — AB-enabled rangefinders pair directly | Yes — Vectronix, MTC, SIG-class devices | Partial — only rangefinders supporting the Kestrel Ballistics Bluetooth Protocol | Yes — built-in GPS rangefinder mode, plus third-party Bluetooth rangefinder support |
05. Trueing, zero & loads
Correcting the solution against real impacts, and managing rifle, load and reloading data.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Drag Scale Factor trueingisolate drag-curve error from MV error |
tie |
Yes, named DSF | Yes — DSF is an AB-originated term | Has BC/MV truing, less formalized | Has its own MV/BC truing workflow, not branded as DSF | Yes — Muzzle Velocity Truing |
| Layered zero offsetssession / permanent / mechanical prism, tracked independently |
us |
Yes — unusually granular | Simpler single zero model | Simpler single zero model | Not confirmed in public docs | Not confirmed in public docs |
| Multi-model trajectory diagnostictests Zero offset, MV, global BC/drag and velocity-banded BC against your observed DOPE, ranked by RMSE |
us |
Yes — ELR Trajectory Diagnostic, read-only, with a recommended validation distance to confirm the winning model and a one-page PDF report | No — DSF trues one drag/MV parameter at a time, not a ranked multi-hypothesis fit | No — single BC/MV truing only | No — single MV/BC truing workflow only | No — single Muzzle Velocity Truing only |
| Saved rifle/load profiles |
tie |
Unlimited, on-device | Capped — 30 guns on Kestrel Elite hardware | Unlimited, on-device | Unlimited, cloud-tied to account | Unlimited (PRO), with online range-card backup |
| Powder-dispenser device integrationBluetooth control of an automated powder dispenser |
us |
Yes — Universal Loader: AutoTrickler V4 and RCBS ChargeMaster Link confirmed on real hardware; AutoTrickler V3 implemented but unverified; ChargeMaster Supreme / MatchMaster implemented but untested, with Connect disabled for now | No | No | No | No |
| Load development workflowsladder / OCW testing with node detection |
us |
Yes — Ladder and OCW with automatic node-band detection and graphing, tap-based group-size estimate, photo/voice notes and PDF export | Not confirmed in public docs | Not confirmed in public docs | Partial — Group Analysis measures group size and impact offsets from a photo; no ladder/OCW workflow confirmed in public docs | Not confirmed in public docs |
| PCP / air rifle platformpellets and slugs as a first-class rifle type |
tie |
Yes — free, opt-in third platform: bore sizes .177–.50, 306-entry pellet/slug catalog across 21 manufacturers, regulator/power/tune fields; spin drift and aerodynamic jump deliberately omitted as unvalidated for pellets | No dedicated air-rifle platform confirmed in public docs; airgun users report the solver is geared to centerfire | Yes — pellet database built in (650 pellets on Android, 459 on iOS per its official feature list) | Not confirmed in public docs | Not confirmed in public docs |
06. Data & sharing
What happens to a solve after the shot — logging, backup, and getting it onto another screen.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Session / DOPE history logfull environment snapshot per session |
us |
Yes — deep session log | Limited — 10 saved targets | Basic shot log | Cloud-saved results and favorites; no confirmed environment-snapshot session log | Chart Mode DOPE + online range-card backup (PRO); no confirmed full environment-snapshot log |
| Cloud account / multi-device sync |
them |
None — local export/import only | Yes — via LiNK app + AB account | Yes — online profile sharing | Yes — account login, profiles and results auto-synced across devices | Yes — online range-card backup (PRO) |
| Local backup / PDF export / phone-to-phone shareno account, works offline |
us |
Yes — dependency-aware selective export + PDF | Limited | Limited | Not confirmed in public docs — cloud-account model | Chart Mode works without a cell signal; broader export not detailed in public docs |
| Live phone-to-phone spotter/mirrorreal-time BLE solution + impact sharing, no server |
us |
Yes — Range Viewer | No | No | No | No |
| Import rifle/load data from a competitorswitching in, not just exporting your own data out |
us |
Yes — auto-detects Strelok (.srl) and Applied Ballistics/Kestrel (.pro) exports; AB/Kestrel data imports as new rifles with mismatched-caliber fields flagged for review, while Strelok's own rifle-level fields have proven unreliable enough that GS imports its loads only, for attaching onto one of your existing rifles | Not confirmed in public docs | Not confirmed in public docs — Strelok's own import is Strelok-to-Strelok (cloud backup) only | Not confirmed in public docs | Not confirmed in public docs |
07. Rifle/load comparison tools
Scoring a shot's outcome statistically rather than as a single point solution, and choosing the right rifle for it.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Monte Carlo / statistical hit-probability simulationrandomized trials against a target size, not a single deterministic solution |
tie |
Yes — Hit Probability simulates 10,000 first-round shots with your wind, range and group errors against a chosen target (1 or 1.5 MOA, 10/20/30 cm plate, IPSC or custom), with an impact plot, a "What's costing you hits" error budget and 80% / 50% effective range | Yes — Applied Ballistics' flagship Monte Carlo probability-of-hit analysis, available on select Kestrel hardware and AB Quantum | Not confirmed in public docs — the original Strelok Pro's feature list doesn't include it; the WEZ / Monte Carlo tool listed for "Strelok Pro-Ballistic Platform" belongs to Strelok LLC's separate, unaffiliated app | Not confirmed in public docs | Not confirmed in public docs |
| Multi-rifle ranking for one shotrank every saved rifle/load for the same shot and target |
us |
Yes — Calculate all rifles simulates every saved rifle's active load against the identical shot, weather and target, each with its own group, ranked by hit % with the target size each needs for 50% hits | Not confirmed in public docs | Not confirmed in public docs | Not confirmed in public docs | Not confirmed in public docs |
| Per-rifle uncertainty modeling from your own dataMV SD / dispersion sourced from measured load data, not a flat assumption |
tie |
Yes — each rifle carries its own field group, velocity SD comes from the active load's Ave SD (entered, or carried over from an OCW load development session; 10 fps assumed, with a reminder, when empty), and BC certainty comes from the load (±0.5% trued BC or CDM curve, ±1% published BC) | Yes — lets you set/adjust the uncertainty inputs its Monte Carlo simulation runs with | Not confirmed in public docs | Not confirmed in public docs | Not confirmed in public docs |
08. Equipment & match planning
Whether the mounted hardware can actually reach a distance, and planning a whole match ahead of time.
| Capability |
Edge |
GS Ballistic Suite |
Applied Ballistics / Kestrel |
Strelok Pro |
Hornady 4DOF |
GeoBallistics (BallisticsARC) |
| Mechanical dial-capability checkcan the mounted scope/rail actually dial the elevation a distance needs, from entered Up/Down travel and rail cant |
us |
Yes — Equipment Reach Planner, with a ranked "GET ME THERE" upgrade plan (rail/base size, adjustable mount, minimum scope travel to shop for, external elevation device, or dial-and-hold) when the current setup falls short | Not confirmed in public docs | Not confirmed in public docs | Not confirmed in public docs | Not confirmed in public docs |
| Match / stage planningwhole match organised as Match → Stage → Target, recalculated together |
tie |
Yes — Match / Stage Mode imports Target Cards as stages, recalculates everything against live weather in one pass, and runs a stage in a full-screen swipe-through view | Yes — AB Quantum Pro "Grouped Sectors": Sectors containing multiple Stages, each with its own Target Cards, built for PRS / NRL Hunter courses and shareable by QR code | Not confirmed in public docs | Not confirmed in public docs | Partial — Comp Mode pre-programs one course of fire with multiple named targets, each with its own shot angle and azimuth |
Bottom line
Where GS Ballistic Suite leads
- Rimfire drag modeling: RA4 applied automatically by default — matching what Strelok Pro offers as a manual selection, and beating AB's 2-measured-load rimfire coverage.
- Trueing granularity: session, permanent, and mechanical offsets tracked and reset independently — no competitor here offers that level of separation.
- ELR Trajectory Diagnostic: a read-only multi-model diagnostic that tests Zero offset, MV, global BC/drag and velocity-banded BC against your entered DOPE and ranks them by RMSE, with a recommended validation distance — competitors here true one parameter at a time, not a ranked multi-hypothesis fit.
- Session/DOPE history depth, with a full environment snapshot per entry.
- Reloading integration — Universal Loader talks directly to a Bluetooth powder dispenser, and Ladder/OCW load development is built in; no competitor here does either.
- Rifle-mounted Bluetooth cant sensor (SG Pulse) with a shot timer — not confirmed as a comparable capability in any competitor's public docs.
- Velocity Loss BC Calculator — solves BC (or an RA4 drag-scale factor) from chronograph readings taken downrange; competitors here document truing from observed drop instead.
- Local backup, PDF export, and phone-to-phone sharing with no account required — most competitors here lean on a cloud account for this.
- Live phone-to-phone spotter sharing over BLE, no account or server.
- Import rifle/load data straight from Strelok or Applied Ballistics/Kestrel when switching over — not confirmed as a comparable capability in any competitor's public docs.
- A free PCP / air rifle platform with its own pellet/slug catalog, alongside centerfire and rimfire.
- Multi-rifle ranking by hit % (Calculate all rifles) — every saved rifle simulated against the same shot and target with its own group, showing the target size each needs for 50% hits — not confirmed as a comparable capability in any competitor's public docs.
- Equipment Reach Planner — a mechanical dial-capability check from entered scope travel and rail cant, with a ranked upgrade plan when the current setup can't reach; not confirmed as a comparable capability in any competitor's public docs.
Where competitors lead
- Real measured drag-curve libraries — Applied Ballistics and Hornady 4DOF both build on radar-measured drag data; this app has neither. Its bullet/factory-ammo catalog supplies published BCs and factory MVs, not independently measured drag curves.
- Powder-temperature MV sensitivity — this app now supports up to three chronographed points with piecewise-linear interpolation, but AB and Hornady 4DOF ship curated tested-powder libraries so the user doesn't have to chronograph it themselves at all.
- Laser rangefinder Bluetooth integration — not supported here at all; AB, Strelok, and GeoBallistics offer it directly, and Hornady 4DOF offers partial support via Kestrel-protocol-compatible rangefinders.
- Cloud account sync across devices — AB, Strelok, 4DOF, and GeoBallistics all offer it in some form.
- AB and Hornady specifically pair with dedicated weather-meter hardware that works without a phone.
- Applied Ballistics' Monte Carlo hit-probability analysis runs directly on dedicated Kestrel hardware in the field, independent of a phone.
Trademark notice.
Applied Ballistics® and Kestrel® are trademarks of their
respective owners (Applied Ballistics, LLC and Kestrel
Instruments / Nielsen-Kellerman). Strelok Pro is a trademark of
its respective owner. Hornady® and 4DOF® are trademarks of
Hornady Manufacturing, Inc. GeoBallistics and BallisticsARC are
trademarks of their respective owner. AutoTrickler, RCBS,
ChargeMaster and MatchMaster (referenced in the powder-dispenser
row above) are trademarks of their respective owners. Shooters Global
and SG Pulse are trademarks of their respective owner. Product and
company names are used here for identification and comparison
purposes only. GS Ballistic Suite is not affiliated with,
sponsored by, or endorsed by Applied Ballistics, Kestrel, Strelok
Pro, Hornady, GeoBallistics, AutoTrickler, RCBS, or Shooters Global.
Independent development.
GS Ballistic Suite was independently designed and developed.
Ballistics and reloading software in general shares
industry-standard terminology — MOA, MIL, BC, DOPE, zero, spin
drift and similar terms — and common workflow concepts, since
every application on this page solves the same underlying
problems for the same audience of shooters and reloaders. Any
similarity in terminology, layout, feature set or workflow
between GS Ballistic Suite and Applied Ballistics, Strelok Pro,
Hornady 4DOF or GeoBallistics is coincidental and reflects that
shared problem domain — it is not the result of copying code,
designs, content or other materials from any of those products.
Sources consulted (Aug–Sep 2026)
- Hornady 4DOF — hornady.com/4dofapp, hornady.com 4DOF overview & technical papers, hornadykestrel.com FAQs, kestrelmeters.com software partners page
- GeoBallistics (BallisticsARC) — apps.apple.com GeoBallistics listing, play.google.com GeoBallistics listing, swatmag.com GeoBallistics/BallisticsARC review, kestrelballistics.com third-party software page
- Applied Ballistics / Kestrel and Strelok Pro — each vendor's own public product documentation
- Applied Ballistics transonic range prediction — kestrelballistics.com Kestrel 5700 Elite product page and buying guide, kestrelmeters.com Kestrel 5700 Applied Ballistics manual
- Applied Ballistics Monte Carlo probability-of-hit analysis — appliedballisticsllc.com feature overview, kestrelballistics.com Kestrel product pages, thefirearmblog.com Kestrel Elite hardware review
- Strelok Pro identity — the original Strelok Pro (Igor Borisov) was removed from the Apple App Store and Google Play in 2023 under US sanctions and is still distributed via strelokpro.online; "Strelok Pro-Ballistic Platform" on the App Store and Google Play is a separate app by Strelok LLC that states it is not affiliated with any earlier Strelok app — recoilweb.com, loaddevelopment.com, apps.apple.com Strelok LLC listing
- Strelok Pro pellet support and BC truing — strelokpro.online Android and iOS feature lists; airgunnation.com and hardairmagazine.com user threads on pellet BCs
- AB Quantum Grouped Sectors, truing and chronograph support — apps.apple.com AB Quantum listing and version history, thescienceofaccuracy.com AB Quantum pages, manuals.plus AB Quantum walk-through, precisionrifleblog.com AB Quantum release review
- SG Pulse / SG Pulse Pro and its planned AB Quantum integration — timer.shooters.global product pages
- Hornady 4DOF BC Calculator and Group Analysis — hornady.com/4dofapp
- GeoBallistics (now part of Vortex Optics) Comp Mode and Muzzle Velocity Truing — vortexoptics.com/geoballistics, apps.apple.com GeoBallistics listing
