iStrelok. Ballistic calculator for iPhone


Ballistic calculator for iPhone, iPad, iPod

Supports metric and imperial units! (yards, feet, inches, etc)
Supports iPhone, iPad and iPod (iOS versions from 6.0)

Field-proven accuracy since 2001

Configuring and tuning iStrelok

Here is a video from users of iStrelok: (Spanish)

Supported reticles (584!):


APLR1 SFP IR MIL, Midas BTR 2.5-15×50, Athlon
APMR-FFP-IR-MIL, Argos BTR 6-24x50, Athlon
ATMR-FFP-IR-MOA, Argos BTR 6-24x50, Athlon
3G (Barska)
P4 (Barska)
SKS (Barska)
Mil-Dot, Ace 4-14x44, Bering Optics
Prismatic Supra 3.0x32, Bering Optics
Ballistic Mildot (Burris)
XTR Ballistic Mildot (Burris)
Ballistic Plex (3-9x, 4.5-14x, 4-16x Burris)
Ballistic Plex (2x-7x Burris)
Ballistic Plex (3x-12x Burris)
Ballistic CQ 5.56 (Burris)
Ballistic CQ 1X (Burris)
Ballistic Plex (3.5-10x Burris)
Ballistic Plex E1 (3-9x, 4.5-14x, Burris)
G2B Mil-Dot (Burris)
XTR Ballistic 5.56 Gen2 (Burris)
XTR 2 Ballistic 5.56 Gen3 (Burris)
XTR Ballistic 7.62 (Burris)
Plex (3-9x40 Burris)
Ballistic E1 FFP (Burris)
Ballistic E1 FFP Varmint (Burris)
Fine Plex (Signature 8-32x Burris)
Ballistic Plex E1 MV (Burris)
F-Class MOA (Burris)
XTR II Ballistic CQ Mil (Burris)
X96, Eliminator III, 4-16x (Burris)
Ballistic Milling Reticle (Burris)
C4 Wind MOA (Burris)
3P#4, FourX 3-12x, Burris
Contender (BSA)
Contender Mil-Dot (BSA)
TMD, FFP 4-14x44, BSA
DOA 600 (Bushnell)
BTR-1 (1-6.5x24, 1-4x24 Bushnell)
DOA 250 (Bushnell)
CF 500 (Bushnell)
BTR-2 (Bushnell)
BTR-Mil (Bushnell)
G2DMR (Bushnell)
Drop Zone 22 Rimfire BDC (Bushnell)
Drop Zone 223 BDC (Bushnell)
Multi-X, Sportsman 3-9x32 (Bushnell)
Multi-X, 3-9x (Bushnell)
Multi-X, 3-10x (Bushnell)
Multi-X, 4-12x (Bushnell)
Multi-X, 6-18x (Bushnell)
Ballistic (Bushnell)
Mildot, Yardage Pro 4-12x42 (Bushnell)
MZ 200 Two-dot (3-9x, Bushnell)
Y-TAC (BW Optics)
EXT (Cabela's)
Powderhorn EXT (Cabela's)
Duplex, 6-18x, Pine Ridge (Cabela's)
Duplex, 3-12x, Pine Ridge (Cabela's)
TJ-1 (C-More)
TDRM (Counter Sniper)
HFT (Delta)
MCZ (Delta)
MCZ 2 (Delta)
MR.P300, 3-24x (Delta)
LR.600, 3-24x (Delta)
BDA, 2.5-10x48 (Docter)
BDA, 3-12x56 (Docter)
Duplex 30/30
MPR (EDgun)
MPR 2, 12x44 (EDgun)
Specter DR 1.5x/6x (5.56), Elcan
Specter DR 1.5x/6x (7.62), Elcan
Specter DR 1x/4x (5.56), Elcan
Specter DR 1x/4x (7.62), Elcan
XPS3-2/XPS2-2 (EOTech)
EXPS3-4 (EOTech)
XR308 (EOTech)
Enhanced Mildot (Falcon)
ML16 (Falcon)
Brabant-20 (Falcon)
MOA (Falcon)
MP20 (Falcon)
LP20, 1.5-5x30 (Falcon)
X2M-DOT (2-20x, Guardian)
½ Mil Dot 10x (Hawke)
½ Mil Dot 20x (Hawke)
SR12 (Hawke)
SR6 (Hawke)
MAP6 (Hawke)
MAP6a (Hawke)
MAP8 (Hawke)
SR Pro old (Hawke)
SR Pro, 3-12x (Hawke)
SR Pro, 4-16x (Hawke)
SR Pro, 6-24x (Hawke)
SR Pro, 8-32x (Hawke)
L4 Dot (Hawke)
AMX Mil Dot (Hawke)
TMX, Frontier 30 SF 5-30×50 (Hawke)
Hensoldt 3-12x56 SSG
Hensoldt ZF 3.5-26x56
CMR, HiLux (Leatherwood)
CMR-AK762, Hilux (Leatherwood)
308 BDC, 2-7x, Hilux (Leatherwood)
ART (Holland)
H-25 (Horus Vision)
H-37 (Horus Vision)
H-58 (Horus Vision)
TReMoR 2 (Horus Vision)
H-70 (Horus Vision)
H-425 (Horus Vision)
H-59 (Horus Vision)
H-50 (Horus Vision)
H-27 (Horus Vision)
H-27D (Horus Vision)
H-102 (Horus Vision)
H-130 (Horus Vision)
MP-8 Dot (IOR/Valdada)
MP-8 Xtreme X1 MRAD (IOR/Valdada)
MP-8 Xtreme X1 MOA (IOR/Valdada)
Xtreme X1 (IOR/Valdada)
HR5 (IOR/Valdada)
Circle Dot X1, FFP (IOR/Valdada)
SH1-83/SH-68 (IOR/Valdada)
CQB, QR-TS 3x25, IOR/Valdada
X02i, 3-9x, Jaeger
X02i, 3-12x, Jaeger
4D (C2.5-10x50 Kahles)
4D (C3-12x56 Kahles)
SM1 (Kahles)
SI1 (Kahles)
Mil 4 (Kahles)
Mil 1 (Kahles)
4D, CT3-9x42 (Kahles)
4D-Dot (3,5-10x, Kahles)
4-Dot (Helia 5 1-5x, Kahles)
G4-B (1-6x, Kahles)
G4-B (Helia 5 2,4-12x, Kahles)
Mil 6 (Kahles)
4-Dot (Helia 5 2,4-12x (Kahles)
ZFM Nato Nimrod (Kahles)
4A, C 1,5-6x42 (Kahles)
4A, K624TT 6-24x56 (Kahles)
AMR (Kahles)
MSR (Kahles)
Ballistic 550, 3-9x (Konus)
Modified Mil Dot, F-30 6-24x52 (Konus)
6-dots MilDot (Leapers/CenterPoint)
9-dots MilDot (Leapers/CenterPoint)
IE Mil-Dot, UTG 3-12x44 (Leapers)
Ballistic, 2.5–10x42 ER (Leica)
Ballistic, 3.5–14x42 ER (Leica)
Ballstic, 1.5-10x42 Magnus (Leica)
Ballstic, 2.4-16x56 Magnus (Leica)
Ballstic, 2.5-10x42 ERi (Leica)
Ballstic, 3-12x50 ERi (Leica)
4A, 2.5-10x42 ERi (Leica)
4A, 3-12x50 ERi (Leica)
4A, 2.4-16x56 Magnus (Leica)
G7 IBS (Leica)
L3D, 1-6.3x24, Magnus (Leica)
TMR (Leupold)
SPR (Leupold)
LR Duplex (2-7x, Leupold)
LR Duplex (3-9x, Leupold)
LR Duplex (4-12x, Leupold)
LR Duplex (2-12x, Leupold)
Varmint Hunter (Leupold)
LR Varmint Hunter (Leupold)
Boone and Crockett (Leupold)
Ballistic Firedot (Leupold)
SA.B.R. (Leupold)
LRV Duplex (Leupold)
CM-RW, 5.56/.223 (Leupold)
CM-RW, 7.62/.308 (Leupold)
Illum. Duplex (VX-3 3.5-10x, Leupold)
Pig Plex (Leupold)
Wide Duplex (FX-3 6x42, Leupold)
Wide Duplex (VX-1 3-9x, Leupold)
Wide Duplex (VX-1 4-12x, Leupold)
Fine Duplex (VX-3 6.5-20, Leupold)
Fine Duplex (VX-2 6-18, Leupold)
Fine Duplex (VX-3 8.5-25, Leupold)
Fine Duplex (VX-6 3-18, Leupold)
Fine Duplex (VX-2 4-12x, Leupold)
Duplex (VX-3 3.5-10, 4.5-14, Leupold)
Duplex (VX-6 1-6x24, Leupold)
Duplex (VX-3 2.5-8x, Leupold)
Duplex (VX-3 1.5-5x, Leupold)
Duplex (VX-1/2 2-7x, Leupold)
Firedot Wind-Plex (VX-R 3-9x, 4-12x, Leupold)
Wind-Plex (VX-3 3.5-10x, 4.5-14x, Leupold)
FireDot SPR (Leupold)
Firedot 4 (VX-R 3-9x, Leupold)
Firedot 4 (VX-R 4-12x, Leupold)
Firedot 4 (VX-6 1-6x, Leupold)
Firedot Duplex (VX-R 1.25-4x, Leupold)
Firedot Duplex (VX-R 4-12x, Leupold)
Firedot Duplex (VX-6 3-18x, Leupold)
Duplex (VX-6 2-12x, Leupold)
Duplex (VX-1/2 3-9x, Leupold)
Duplex (VX-1/2 4-12x, Leupold)
Duplex (VX-2 1-4x, Leupold)
Firedot Circle (VX-6 1-6x, Leupold)
Firedot Circle (VX-R 1.25-4x, Leupold)
CM-R2 (Leupold)
German #4, VX-2 3-9x (Leupold)
Illum. German #4 Dot, VX-3L 3.5-10x (Leupold)
Rifleman Ballistic, 3-9x (Leupold)
300 Blackout (Leupold)
TS-32X1 (Leupold)
TMOA (Leupold)
L5 (Lucid)
Chevron (HD7, Lucid)
Drop Dot (HD7, Lucid)
P7 (Lucid)
STD, (6x40, Luger)
Hold-Over 2 (Lynx)
RF (LX2 3.5-10x, 2.5-15x, Lynx)
Hold-Over (Lynx)
SA Hunters (LX2 2.5-15x50, Lynx)
SA Hunters (LX2 3.5-10x50, Lynx)
SA Hunters (LX2 5-20x50, Lynx)
MilStep (Lynx)
3GS, 1-6x24, Lynx
Greybull Precision (Leupold)
Greybull Precision Gen2 (Leupold)
MSR (MakSnipe)
MTR-1 (March)
MTR-2 (March)
MTR-3 (March)
MTR-4 (March)
FML-1 (3x-24x42, March)
FML-1 (5x-40x56, March)
FMA-1 (March)
FMA-2 (March)
MML (March)
MTR-FT (March)
Marcool MAR-091 HY1346
Marcool MAR-092 HY1347
Marcool MAR-096 HY1252
K-5.56 (Meopta)
4C (R1r 3-12x56, Meopta)
BDC (Meopta)
McWhorter HV (Meopta)
McWhorter MV (Meopta)
4A/4B (Meopta)
Z-Plex II (6-18x50 Meopta)
MilDot II, ZD 6-24x56 RD (Meopta)
K-Dot 2 (Meopta)
MMD (Meopta)
Mil-DotBar 0.5 Mil, LRS (Millet)
Mil-DotBar 1 Mil, TRS (Millet)
Donut-Dot, DMS-1 (Millet)
BDC (4-20x50, Minox)
BDC (6-30x56, Minox)
XR-BDC (4-20x50, Minox)
XR-BDC (6-30x56, Minox)
BDC (3-15x42, Minox)
BDC (3-9x, Minox)
BDC 400 (3-9x, Minox)
BDC 400 (4.5-14x, Minox)
BDC 600 (2-10x, Minox)
BDC 600 (3-15x, Minox)
BDC 800 (3-15x, Minox)
BDC 800 (5-25x, Minox)
MR5 (Minox)
Range Finder, 1-6x24, Monstrum Tactical
Range Finder, 3-9x, Monstrum Tactical
SCB (MTC Optics)
AMD (MTC Optics)
SCB 2 (MTC Optics)
MH10X, EVX 5-20×50, Optisan Optics
FFPMH16, EVX 4-16×44 F1, Optisan Optics
FFPMH24, EVX 6-24×50 F1, Optisan Optics
MSK3, Optisan Optics
TRAQ, Mamba, 1-4x24, Optisan Optics
EMD12, HX 4-12X40AO, Optisan Optics
BRC9X, 3-9x, Optisan Optics
BRC12X, 4-12x, Optisan Optics
NP-R2 (5.5-22x, 8-32x, 12-42x, Nightforce)
NP-R2 (10x, 15x, Nightforce)
NP-R1 (5.5-22x, 8-32x, 12-42x, Nightforce)
NP-R1 (3.5-15x, Nightforce)
MLR (Nightforce)
MLR 2 (Nightforce)
NP-1RR (Nightforce)
Velocity 1000 LV5 (Nightforce)
Velocity 1000 MV5 (Nightforce)
Velocity 1000 UHV (Nightforce)
Velocity 1000 UHV5 (Nightforce)
Velocity 1000 HVM (Nightforce)
Velocity 1000 HVM5 (Nightforce)
Velocity 1000 HV5 (Nightforce)
NP-2DD (Nightforce)
Velocity 600 HV (Nightforce)
Velocity 600 MV (Nightforce)
Velocity 600 LV (Nightforce)
MD2.0 (Nightforce)
MOAR (3.5-15x, 4-14x Nightforce)
MOAR (5.5-22x, 8-32x Nightforce)
MOAR (5-25x, 5-20x, Nightforce)
MIL-R (SFP) (Nightforce)
MIL-R (FFP) (Nightforce)
DDR (Nightforce)
DDR-2 (Nightforce)
NP1 (1-4x, Nightforce)
NP1 (3.5-15x, Nightforce)
NP1 (5.5-22x, 8-32x, 12-42x, Nightforce)
FC-3G (Nightforce)
NP-RF1 (Nightforce)
FCR-1 (Nightforce)
FC-2 (Nightforce)
CH-3 (Nightforce)
IHR (2.5-10x, Nightforce)
Range Finder (NcStar)
P4 Sniper (NcStar)
Urban Tactical Reticle, ECO 4X34, NcStar
LRX (Nikko Stirling)
NATO (Nikko Stirling)
FT (Nikko Stirling)
FT (SMOA), Nikko Stirling
Duplex (Nighteater, Nikko Stirling)
Mil-Dot (2.5-10, 4-16, 6-24, Nikko Stirling)
HMD (Nikko Stirling)
Holdfast, 4-16x50, Nikko Stirling
Holdfast, 6-24x50, Nikko Stirling
BDC (Nikon)
BDC Predator (Nikon)
BDC 150 (Nikon)
BDC 250 (Nikon)
BDC 300 (Nikon)
BDC 600 (Nikon)
BDC 800 (Nikon)
BDC Carbine (Nikon)
BDC SuperSub (2-7x, 1.5-6x, Nikon)
Point Blank (1-4x, Nikon)
Nikoplex (Prostaff 2-7x, Nikon)
Nikoplex (Prostaff 3-9x, Nikon)
Nikoplex (Prostaff 4-12x, Nikon)
NikoPlex (Monarch UCC 2-7x, Nikon)
NikoPlex (Monarch 2.5-10x, Nikon)
NikoPlex (Monarch 4-16x, Nikon)
Nikoplex (5-20x, Nikon)
Nikoplex (6-18x, Nikon)
Nikoplex (Buckmaster 4.5-14x40, Nikon)
NikoPlex (PROSTAFF 4x32 Rimfire, Nikon)
Advanced BDC, Monarch 5, 4-20x50 (Nikon)
Advanced BDC, Monarch 5, 5-25x50 (Nikon)
Advanced BDC, Monarch 5, 6-30x50 (Nikon)
BDC (Oculus)
Range Finder (Osprey)
Precision Plex (Pentax)
Rapid Reticle 22-1 (PFI)
RR-Evolution-5.56/7.62 (PFI)
Gen 2 MilDot (Premier Reticles)
Gen 2 XR (Premier Reticles)
PAC3X (Primary Arms)
Center dot (1-4x, Primary Arms)
ACSS 5.56/.308/5.45 (Primary Arms)
ACSS Standard 5.56/5.45/.308, 1-8x24, Primary Arms
ACSS HUD DMR .308/.223, 4-14x44, Primary Arms
ACSS HUD DMR .308/.223, 6-24x50, Primary Arms
ACSS CQB-M (Primary Arms)
ACSS Orion 5.56/.308, 4-14x44 (Primary Arms)
R-Grid, 4-14x44 (Primary Arms)
SQB-MIL, 1-8x24 FFP (Primary Arms)
ACSS Micro Dot, Primary Arms
ACSS HUD/DMR 5.56 Nato, 4-14x44, Primary Arms
M50i, N750/N770 (Pulsar)
M51i, N750/N770 (Pulsar)
M52i, N750/N770 (Pulsar)
M54i, N750/N770 (Pulsar)
M51i, N850/N870 (Pulsar)
M50, Apex XD38 (Pulsar)
M50, Apex XD50 (Pulsar)
M54, Apex XD50, Pulsar
M52, Apex XD75 (Pulsar)
T51, Apex XD75 (Pulsar)
T50, Apex XD75 (Pulsar)
Accu-Range (Redfield)
Accu-Ranger Varmint (Redfield)
Accu-Ranger Hunter (Redfield)
Accu-Ranger Subot ML (Redfield)
Accu-Ranger Crossbow (Redfield)
TAC-MOA (3-9x, Redfield)
TAC-MOA (6-18x, Redfield)
4-Plex, 3-9x (Redfield)
Fine Plex, Revenge 6-18x (Redfield)
T3 (Rudolph)
PSO-1 (Russia)
Dedal-445/450 (Russia)
Dedal-460/470/480/490 (Russia)
TMR, Dedal (Russia)
POSP 8x42 (Russia)
PSO-1-1 (Russia)
FFT (Pilad, Russia)
SNR (Pilad, Russia)
PDS Universal (Russia)
PN19K-3 (Russia)
Police, PM2 3-12x50, Schmidt&Bender
P4(F,L) (Schmidt&Bender)
P4L (5-25x56 PMII-2, Schmidt&Bender)
P4L fine (MOA) (Schmidt&Bender)
MSR (Schmidt&Bender)
A8Varmint (Schmidt&Bender)
FD7 (Schmidt&Bender)
H2CMR (Schmidt&Bender)
A4 (8x56, Schmidt&Bender)
A7, 3-12x50 Klassik, (Schmidt&Bender)
L3, 3-12x50 Zenith (Schmidt&Bender)
P1, E, V1 (Shepherd)
P2, V2 (Shepherd)
P3 (Shepherd)
P1A, PE1, V1A (Shepherd)
Varminter M.556 (Shepherd)
P22 LR (Shepherd)
P22 MAG (Shepherd)
Trifecta Reticle System (4-12x44 Scheels)
HS-223 (Wolfhound 6x44, Sightmark)
TMD, Pinnacle 1-6x24 FFP, Sightmark
MOA 2 (Sightron)
MOA 3 (Sightron)
HHR (Sightron)
Modified Mil-Dot (Sightron)
Mil-Hash (Sightron)
CP-4, SigTac (Sig Sauer)
MOA Milling, TANGO 6 (Sig Sauer)
3-Gun, 1-6x TANGO 6, Sig Sauer
Smart Reticle (Simmons)
Truplex, Blazer 3-9x40 (Simmons)
Truplex, Aetec 2.8-10x44 (Simmons)
SCR (Steiner)
MSR (Steiner)
3TR 7.62, T5Xi 1-5x24, Steiner
3TR 5.56, T5Xi 1-5x24, Steiner
P3TR, P4Xi 1-4x24, Steiner
Mini (1.5-6x42, Sturman)
BR (Swarovski)
4A-300 (Swarovski)
TDS-4 (Swarovski)
TDS (Swarovski)
BRT (Z6i 1-6x24,Swarovski)
BRX&BRH (Swarovski)
4A-I (2.5-15x56, Swarovski)
4A-I (2-12x50, Swarovski)
#4 (1-6x24, Swarovski)
#4 (1-6x24 EE, Swarovski)
4W (Swarovski)
4-I (Z6i, 1-6x24, Swarovski)
4-NK (Swarovski)
Plex (Z5, 5-25x52 Swarovski)
Plex (Z6i, 3-18x50 Swarovski)
4WX, X5 3.5-18x50, Swarovski
4WX, X5 5-25x56, Swarovski
CD-I (1-6x24, Swarovski)
Plex (3-9x50, Swiss arms)
Mil-Quad (SWFA)
Donut (SWFA)
SS1-4 Donut (SWFA)
Mil-Quad DM, SS 1-4x24 SFP (SWFA)
Impact BDC 223/5.56, RESPONSE 2.5-10x42, Tract
Impact BDC 223/5.56, RESPONSE 4-16x42, Tract
Impact BDC 308/7.62, RESPONSE 4-16x42, Tract
ACOG TA31F (Trijicon)
TA01NSN (Trijicon)
TA01 (Trijicon)
TA01B, .308 ACOG 4x32 (Trijicon)
Chevron (TA11E ACOG, Trijicon)
Chevron .223 Ballistic (TA33-8, Trijicon)
Horseshoe .223 Ballistic (TA33-H, Trijicon)
Ring&Dot (TA26S-10/TA44S-10, Trijicon)
300BLK (TA33-C, Trijicon)
ACOG TA31RCO-M4 (Trijicon)
ACOG TA31RCO-A4 (Trijicon)
MOA-Dot (3-9x40 AccuPower,Trijicon)
MOA-Dot (2.5-10x56 AccuPower,Trijicon)
MOA-Dot (1-6x24 AccuPoint,Trijicon)
Triangle (TR24 AccuPoint 1-4x24,Trijicon)
Triangle (TR25 AccuPoint 1-6x24,Trijicon)
Triangle (TR22 AccuPoint 2.5-10x56,Trijicon)
Triangle (TR26 AccuPoint 2.5-12.5x42,Trijicon)
Triangle (TR20 AccuPoint 3-9x40,Trijicon)
Triangle (TR23 AccuPoint 5-20x50,Trijicon)
.223/77 Grain Ballistic Reticle (1-6x24, Trijicon)
BDC (Truglo)
MilDot (USMC)
MilDot (US Army)
Mil-Scale MPR (US Optics)
Mil-Scale GAP (US Optics)
MDMOA (US Optics)
PCMOA Scale (US Optics)
RDP MOA Scale (US Optics)
MOA Scale Type 1 (US Optics)
RDP Mil (US Optics)
C2 (US Optics)
C2 Mil (US Optics)
CD-Mil (US Optics)
RWF 3-Gun (US Optics)
JNG MOA (US Optics)
JNG MIL (US Optics)
BDC (SN-4S 1-4x, US Optics)
EMDR (Weaver)
CIRT (Weaver)
TBX (Weaver)
.223 Ballistic-X (Weaver)
EBX (Weaver)
Ballistic-X (Weaver)
FBR (Valiant)
MPR (Vector Optics)
MP (Vector Optics)
MPT1 (Vector Optics)
MPN-1, Vector Optics
EBR-1 MRAD FFP (6-24x Vortex)
EBR-1 MRAD SFP (6-24x Vortex)
EBR-1 MOA FFP (6-24x Vortex)
EBR-1 MOA SFP (6-24x Vortex)
Dead-Hold BDC dots (Vortex)
Dead-Hold BDC hashes (Vortex)
EBR-1 MRAD SFP (4-16x Vortex)
EBR-1 MOA SFP (4-16x Vortex)
EBR-1 MOA FFP (2.5-10x, 4-16x Vortex)
EBR-1 MRAD FFP (4-16x Vortex)
TMCQ MOA, 1-4x, Vortex
TMCQ MRAD, 1-4x, Vortex
EBR-1 MOA SFP, 2.5-10x (Vortex)
EBR-1 MRAD SFP, 2.5-10x (Vortex)
EBR-1 MRAD FFP, 2.5-10x (Vortex)
JM-1 BDC 1-6x (Vortex)
EBR-1 MOA FFP (5-20x Vortex)
EBR-2B MRAD (Vortex)
EBR-2B MOA (Vortex)
XLR (Vortex)
VMR-1 MRAD SFP (4-16x Vortex)
VMR-1 MRAD SFP (6-24x Vortex)
VMR-1 MOA SFP (4x-16x Vortex)
VMR-1 MOA SFP (6-24x Vortex)
EBR-556 (Vortex)
V-Plex (Crossfire II 2-7x32, Vortex)
V-Plex (Crossfire II 3-9x40, Vortex)
Mil Dot (Viper 6.5-20x50, Vortex)
V-Plex Wide (Viper 6.5-20x50, Vortex)
V-Plex, Viper HS 4-16x44 (Vortex)
VMR-2 MOA SFP (1-6x Vortex)
VMR-2 MRAD SFP (1-6x Vortex)
V-Brite, 1-4x24 (Vortex)
V-Brite, 3-12x56 (Vortex)
EBR-2C MRAD (Vortex)
EBR-2C MOA (4.5-27x, Vortex)
EBR-2C MOA (6-24x, Vortex)
EBR-1C MRAD (4.5-27x, Vortex)
EBR-3 (Vortex)
EBR-556B (MOA) (Vortex)
CQMR-1 (Vortex)
AR-BDC (1-6x24, Vortex)
EBR-2 (Razor HD 5-20x50, Vortex)
HSR-4 (3-15x, Vortex)
G4 BDC (3-15x, Vortex)
DRT (MOA), Spitfire, Vortex
EPB MILS (Wotac)
EPB MOA (Wotac)
Rapid Z 1000 (Zeiss)
Rapid Z 800 (Zeiss)
Rapid Z 600 (Zeiss)
Rapid Z7 (6-24x, Zeiss)
Rapid Z7 (4-16x, Zeiss)
Rapid Z 5 (Zeiss)
Rapid Z Varmint (Zeiss)
Rapid Z Varmint(85) (Zeiss)
Z-Plex (Conquest 3-9x50, Zeiss)
Z-Plex (Conquest 4.5-14, 6,5-20, Zeiss)
#6/#60 (Duralit, 1.2-5x, 2-8x, 3-12x, Zeiss)
Z-Plex (Conquest HD5 5-25x50, Zeiss)
Z-Plex (Victory Diavari, Zeiss)
V69 (2.5-10x, 3-12x, Victory Varipoint iC, Zeiss)
#42 (Diavari VM/V, 2.5-10x, Zeiss)
#4 (Diavari VM/V, 1.5-6x, Zeiss)
RZ-8 (Zeiss)
RZ-6 (Zeiss)
#66 (Victory Diarange 2.5-10x, Zeiss)
Mil-Dot(43), Conquest 3-9x40 MC, Zeiss
Mil-Dot(43), Conquest 3-9x50 MC, Zeiss
Mil-Dot(43), Conquest 3.5-10x, Zeiss

User manual

Frequently Asked Questions (FAQ)


Q. I have iStrelok in my iPhone and just bought iPad. How can I transfer my data to iPad?

A. 1. On iPhone make Export rifles to Dropbox
2. On iPad make Import rifles from Dropbox
That's it.

Q. I have Strelok+ on Android phone and have iPad/iPhone with iStrelok. How can I move my data to iStrelok?

A. 1. On Android export rifles to Dropbox
2. On iPhone. Link iStrelok to Dropbox. Dropbox/Apps/iStrelok forder will be created
3. On big computer locate file Dropbox/Apps/StrelokPlus/ Copy it to folder Dropbox/Apps/iStrelok
3. On iPhone/iPad. Start iStrelok and make Import rifles from Dropbox.
That's it.

Q. Is it compatible with airgunning as well, or is it only useable for firearms?

A. Yes, it is compatible. You can find ballistic coefficients for air rifle bullets here: Air rifles pellet database

Q. Could you try to explain how to use "truing" feature?

A. Suppose, you input muzzle speed as 2648 f/s
Shoot at distance bigger than zero distance. Suppose this is 800 yards. Calculated elevation for this distance is 26 MOA
Find out REAL elevation is needed to hit the target. Suppose this is 27 MOA.
On the trajectory validation screen input Distance as 800 yards and Elevation as 27 MOA
Tap button "Calculate" and speed at which elevation will be equal 27 MOA will be calculated. It this case, it will be 2609 f/s
Tap button "Use this velocity" and this calculated speed will replace your current cartridge speed (2648->2609) and screen will be closed.
On the main screen tap "Calculate" button and you will get calculated elevation which equals REAL elevation and equals 27 MOA
Now you can input any distance and hit the target.

Q. Could you try to explain how to use the offset relative to first cartridge feature?

A. Sight in with first cartridge in the rifle list. Shoot with second cartridge at the same distance and note vertical and horizontal offset from center. Write this values to the program. Now you can change cartridges without zeroing rifle again.

Q. Could you try to explain further about this reticle scaling ?

A. If you have, for instance, scope with reticle in second focal plane, you be able to use reticle at all magnification range not only one fixed range (as in free version).
You need to know for sure:
1. First focal or second focal reticle you have.
2. Min. and max. magnification your scope.
3. If your reticle is placed to second focal plane you need to now magnification the reticle was calibrated for (Scope manufacturer usually specifies in the manual "power setting for using the ranging features". Use this zoom.).
Tap the "Settings" button on reticle screen and input this values.
After you can set the magnification you prefer and my program will scale reticle dimensions and calculate holdovers for this magnification. No changes in physical dimensions will occur but if you move slider left and right you can see the holdovers changes.

If you doubt which focal plane your reticle is placed, leave the checkbox "This reticle in the First Focal Plane" in checked state.

Q. Am using a Leupold 8.5-25 scope with the varmint reticle
What ranging magnification should I use to get accurate results in your app?

A. 1. On the "Reticle" screen tap "Settings" button
2. Find on a scope power selector a big triangle. Look what magnification it corresponds. Set this magnification as "Ranging magnification".
3. Set 8.5 as "Min. magnification"
4. Set 25 as "Max.magnification"
5. Return to "Reticle" screen, select any power you want of you scope, select the same power in the scope, read holdovers from reticle and shoot.

Q. Any plan to add "Truing" feature?

A. Already included.

Q. What is your definition of "scope height"?

A. Distance between center line of scope and center line of bore. Like here.

Q. What is difference between MilDot (USMC) and MilDot (US Army)?

A.Read this good article: The Truth About Mil Dots

Q. Would it be possible to support reticle duplex for hunting rifle?

A. Sorry, but duplex reticle has no subtensions, so calculate holdovers is not possible. Without holdovers the presence of this reticle in my program does not make sense.

Q. Where is cartriges base?

A. Coming soon. You can find ballistic coefficient for your bullet here

Q. Why I can not hit the target with your ballistic program outputs?

A. Read this good article: Sources of Ballistic Program Inaccuracies

Q. Which drag function used in the program?

A. G1.


Click to download iStrelok on App Store



Explanation of terms:

1. Zeroing weather:
Weather at which you zero the rifle (scope) in

2. Zeroing weather: match current weather:
Weather at which you zero the rifle in match the weather you shoot the range
Another words, you zero in the rifle and shoot the range at the same place and time

3. Zeroing weather: enabled (disabled):
If zeroing weather enabled, the program will consider a difference between zeroing weather and present weather.
If zeroing weather disabled, the program will consider that zeroing weather and the present weather are identical.

4. On how many percent bullet speed will change at change temperature on 15 degrees:

Suppose, you have 2 bullet velocity mesurement. 1 and 2 (for different temperatures):
TempDiference = temp_2 - temp_1;
SpeedDiference = speed_2 - speed_1;

TempModifyer = SpeedDiference/TempDiference*15/speed_1*100;

TempModifyer - this is parameter we need for input to my ballistic calculator.

Here is simple calculator for this purpose: metric units, imperial units


MOA - minute of angle

MIL - miliradian.

clicks - clicks of scope knob

Hor. - Horisontal adjustrment

Vert. - Vertical adjustrment

See also: Strelok for Android, Mac OS X

E-mail me: (russian, english)

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