Strelok Pro-Ballistic Platform
Precision Ballistic Calculator
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Your drop and wind, drawn on your own reticle at the power you actually shoot. Range AI answers in plain English. Every rifle and load one tap apart.
Strelok Pro is a precision ballistic calculator built for long-range shooters, hunters, and firearms enthusiasts.
Enter your rifle, cartridge, and environmental conditions — Strelok Pro calculates bullet drop, windage, and holdover so you can make the shot with confidence.
BALLISTIC CALCULATOR
• Bullet drop and wind drift tables
• Holdover with MOA/MIL adjustments
• Supports imperial and metric units
• Accounts for altitude, temperature, humidity, and barometric pressure
• G1 and G7 drag models with spin drift and Coriolis correction
RANGE AI (Pro+)
• Ask natural-language ballistic questions
• Example: "What's my drop at 600 yards with a .308?"
• AI-powered answers using your saved load data
• Learn ballistics through real-time conversation
SAVED LOADS
• Save rifle and load profiles — up to 3 rifles free, unlimited with Pro
• Instantly switch between setups at the range
• Store muzzle velocity, bullet weight, ballistic coefficient, zero range, and scope height
ADVANCED TOOLS (Pro)
• WEZ / hit probability analysis (Monte Carlo simulation)
• Dual wind modeling
• Load comparison with overlay graphs
• Ballistic calibration (MV, Custom Drag Factor, Drop Scale Factor)
• Customizable trajectory table columns
• Target types (IPSC, animal silhouettes, and custom targets)
ENVIRONMENTAL CONDITIONS
• Manual entry or auto-detect using your device's sensors and location
• Temperature, altitude, humidity, and wind speed
• Interactive wind compass with dual wind support
• Density altitude calculations
FEATURES
• Clean, fast interface designed for real-world use
• Works offline — no internet required (except Range AI)
• Dark mode for low-light conditions
• Optimized for iPhone and iPad
• Built by shooters, for shooters
Whether you're dialing for a 1,000-yard target or preparing for hunting season, Strelok Pro gives you the data you need to make every shot count.
SUBSCRIPTIONS
Strelok Pro offers optional auto-renewable subscriptions:
• Pro Monthly — $4.99/month
• Pro Yearly — $29.99/year
• Pro+ Monthly (includes Range AI) — $9.99/month
• Pro+ Yearly (includes Range AI) — $59.99/year
• Lifetime — $79.99 one-time purchase (excludes Range AI)
Current pricing is always shown on the purchase screen before you buy.
Eligible customers can start a 7-day free trial; billing begins when the trial ends. Payment is charged to your Apple ID at the start of each billing period. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage subscriptions anytime in Settings > Apple ID > Subscriptions.
Questions, bug reports, or feature requests? We'd love to hear from you at feedback@strelokpro.com. We read every email.
Terms of Service:
https://strelokpro.com/terms
Privacy Policy:
https://strelokpro.com/privacy
© Strelok LLC. All rights reserved.
Strelok® is a trademark of Strelok LLC. This application is an original product developed by Strelok LLC and is not affiliated with, endorsed by, or associated with any previous application, developer, or publisher that has used the name "Strelok" or similar branding.
more - Wind direction is now labelled as a clock angle off your bore (0 = headwind, 90 = from your right), so a full-value crosswind is no longer entered as a headwind by mistake.
- Target distance now goes down to 5 yards for airgun and rimfire shooters, with a correct firing solution at short range.
- A cleaner reticle view: the scope picture is no longer overlaid with text.
50 4 days ago
Fixes and improvements: the reticle preview now follows the rifle you pick, the scope picker is clearer, you stay signed in when you lose connection, and the Done button on the number keypad shows up reliably on the first tap.
49 15 Oct
Adds the correct Leupold VX-Freedom Tri-MOA reticle (6-18x40 CDS Side Focus) so it renders to Leupold's own spec instead of a generic stand-in.
48 11 Oct
The holdover call on the reticle view no longer sits on top of the crosshair, so your drop and wind hold stay readable at a glance.
Added a short setup guide the first time you open the app, showing where your rifle, zero, reticle and holdover view live.
47 7 Oct
The target size and range estimator now follows your distance unit setting. If you shoot metric, it takes target size in centimeters and gives the range in meters.
46 1 Oct
Fixed elevation on uphill and downhill (angled) shots - the trajectory now zeroes correctly at your set zero distance.
Corrected the Burris Eliminator 6: 34mm tube and 1/8 MOA clicks, with its own X177 reticle.
Added the Vortex Viper HS-T 6-24x50 with the VMR-1 MOA reticle (subtensions true at 18x).
Added the Berger .30 cal 230gr Hybrid Target bullet.
45 25 Sept
More scopes and reticles from your requests:
- Athlon Ares ETR 4.5-30x56 with the APRS6 reticle
- Athlon Midas BTR Gen2 HD 1-6x24 with the ATSR16 reticle, now drawn to Athlon's subtension sheet
- Sig Sauer TANGO-MSR 1-6x24 with the HellFire FL-6 reticle
- Leupold Boone & Crockett reticle on the VX-3HD 4.5-14x40 and VX-5HD 3-15x44, drawn to Leupold's published holds
- Vortex Viper PST Gen I 6-24x50 with the EBR-1 MRAD and EBR-1 MOA reticles
Plus the Geco Plus .308 170 gr bullet in the built-in library.
Missing a scope, reticle or bullet? Tell us from the Feedback screen and we will add it.
44 20 Sept
New scopes in the catalog: the Vortex Crossfire II hunting line (3-9x40, 2-7x32, 4-12x44, 3-9x50) and the high-magnification AO models (4-12x50, 6-18x44, 6-24x50), all with Dead-Hold BDC and V-Plex reticles.
Bug fixes and reliability improvements.
43 16 Sept
Primary Arms ACSS NOVA reticle: windage lead bars now measure a true 1 MIL, matching the elevation ladder, so your wind holds land on the mark you actually see in the glass.
New scopes in the catalog: Athlon Midas BTR Gen2 HD 1-6x24 (ATSR16) and Vortex Crossfire II 2-7x32 Scout (V-Plex).
42 12 Sept
Added the Vortex Viper HS 4-16x50 (Dead-Hold BDC and V-Plex) to the scope catalog. Stability improvements.
41 30 Aug
- Import your developed loads from Strelok Reload (Rifles > menu > Import from Reload)
- SMOA option on the Target tab units row
- New scopes: Telson Target Master 5-25x56 and Target Master Victory 5-32x56 with the FAR2 reticle
- Fixed: the Solve card no longer shows an endless "Calculating" spinner when a load can't produce a solution; it now tells you what to fix
40 28 Aug
Sign in with Apple works again. If Continue with Apple failed for you over the last few days, this update fixes it.
39 27 Aug
Spanish is now available throughout the app.
New reticles: the PSO-1, the Lynx LX3 4-25x50 ELR and MIL ELR, and the Rudolph family. The ACSS Nova holdovers are corrected to true mils.
The solve screen now prints the hold call right next to the aim point, so the picture and the numbers always agree.
Fixed a case where the solve could sit on "calculating".
38 21 Aug
See elevation and wind in MOA and MIL side by side - tick both columns in the table's column editor.
Browse the full cartridge catalog straight from the Load screen on the Ammunition tab.
A cleaner wind dial: larger windsock and a true boat-tail bullet at the centre.
Faster, safer rifle-library imports.
37 18 Aug
A cleaner wind diagram, designed with one of our shooters: your bullet at the centre pointing downrange, and a windsock on the rim showing where the wind comes from. Nothing overlaps, and the picture reads at a glance.
Set the direction your rifle is pointing and the wind speed right on the Solve screen, next to the target distance.
Elevation now reads as a turret call - the amount plus UP or DN, never a minus sign next to an UP label. The trajectory table's second Drop column is now Elev: your sight adjustment with its direction at every distance.
36 16 Aug
Leica scopes are now in the library - Magnus, Fortis 6, Amplus 6 and PRS.
See your muzzle velocity adjusted for the current weather, right on the Solve screen.
A redesigned wind diagram showing your rifle and the direction the wind comes from.
Open a Strelok Pro backup straight from your files to bring your rifles across.
Clearer G1 / G7 drag model selection.
35 12 Aug
The drop and wind readout under the reticle now follows your own settings. It shows MIL when you shoot MIL, centimetres when you work in metric, and — most importantly — it counts clicks using your rifle's actual turret instead of assuming a quarter MOA. If you run 0.1 mil clicks, that number was previously about two and a half times too low.
The hold direction on the Solve screen is translated. German and French users were reading "UP" and "RIGHT" in English even though the translations were already in the app.
French is now complete. Roughly four fifths of the app was still appearing in English on a French device; the Solve screen, the trajectory table, Settings, the Rifles tab, Gear Lookup, onboarding and the sign-in screens are all translated, along with a further 104 labels across the calculators, the Bluetooth device screen, the range card, the calibration tools and the target map.
34 8 Aug
The Athlon APRS-H2 SFP IR MIL reticle is now drawn correctly. It has no post above the centre dot, and the app was drawing one on every reticle because the reticle data had no way to say an arm is missing. It can now, and the APRS-H2 says so.
Reticle marks are no longer hidden behind the thick posts. On reticles with deep vertical stadia the bottom post was drawn over the outer hash marks — on the Athlon that covered everything from 8 to 10 mils, the marks you hold on at distance. Each post now starts past the last mark on its line.
Second-focal-plane reticles now tell you the magnification their marks are true at. On an SFP scope the subtensions only hold at one power, so a hold read at any other power is wrong by the ratio. Where the manufacturer publishes that figure you will see it under the magnification slider and beside the reticle name. Where they do not, the app says nothing rather than guessing.
33 7 Aug
New: a Clicks column in the trajectory table. It turns each elevation and windage
figure into the number of clicks for your turret, so you dial what the table says
instead of working it out at the rifle.
New: add a scope or reticle by hand when it isn't in the catalog yet.
New: German, alongside Arabic, French and Spanish.
Fixed: the wind hold was labelled the wrong way round on the Solve screen and in
copied dope. The amount was right, the direction was reversed. If you have been
holding off the label rather than the reticle, re-check your recent dope.
Fixed: spin drift was applied to the wrong side for right-hand-twist barrels.
This only reached you if you switched spin drift on, as it is off by default.
Fixed: rifles with mil turrets kept a 0.25 MOA click value unless you changed it,
which asks for far too few clicks. New rifle profiles now default to the click
value that matches the turret. Profiles you already saved are untouched on
purpose — if you set the value yourself, or compensated for a wrong one, nothing
shifts under you. Worth checking the click value on your rifle either way.
Fixed: the reticle view ignored magnification and treated every scope as first
focal plane.
Fixed: adding a scope from Gear Lookup did not put it in your scope list, and
hundreds of community scopes, bullets, cartridges and reticles were being dropped
before they reached you.
Fixed: a rangefinder pull that got no target could still move your shooting angle
and azimuth and report a shot as applied. Only a real return is used now.
32 4 Aug
New: plot a rangefinder shot straight onto the map. Take a reading with a connected Terrapin X, then tap "Plot this shot on the map" to drop the target on satellite imagery and see the terrain around it. Slope is accounted for, so the pin sits where the target actually is rather than out past it.
Fixed: rifle and load editor fields could refuse to accept typing — tapping a field sometimes dismissed the keyboard again straight away. Every editor field now takes input reliably.
Fixed: Kestrel DROP density altitude read about ten times too low. Only the number shown on the Bluetooth screen was affected — shooting solutions were always calculated from temperature, humidity and pressure, so no solution was ever wrong.
31 1 Aug
Fixed: Terrapin X rangefinder measurements now reach your shooting solution — range, incline and direction were being misread from the device data and never appeared. Fixed: placing target and shooter pins on the map by tapping now works reliably.
30 30 Jul
Now available in Arabic. Fixes a Bluetooth issue where distances ranged with a connected Terrapin X rangefinder were not applied to the shooting solution.
29 29 Jul
Fixes an issue where Sign in with Apple could fail on the sign-in screen. Gear Lookup scope imports now handle scopes with incomplete published specs.
28 24 Jul
Fixed: scopes you add through Gear Lookup now always appear in your rifle's scope list, even when the manufacturer's click value couldn't be confirmed — just set the click on your rifle.
27 22 Jul
New: set your target by direction & distance — enter a bearing and range without standing at the target, or drag the shooter and target pins right on the map.
Improved Bluetooth pairing for Terrapin X rangefinders and Kestrel DROP weather meters.
Added the Rudolph Optics 6-24x50 T5 (FFP, MOA) reticle.
UI polish and fixes across the reticle, environment, and ammunition screens.
26 21 Jul
- Wind direction is now labelled as a clock angle off your bore (0 = headwind, 90 = from your right), so a full-value crosswind is no longer entered as a headwind by mistake.
- Target distance now goes down to 5 yards for airgun and rimfire shooters, with a correct firing solution at short range.
- A cleaner reticle view: the scope picture is no longer overlaid with text.
more Version 50 4 days ago
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