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 8.0)

Field-proven accuracy since 2001

Configuring and tuning iStrelok

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

Supported reticles (773!):
Horus reticles were removed according new patent owner (HVRT, Inc) request


1 MOA dot
2 MOA dot
3 MOA dot
4 MOA dot
6 MOA dot
Rangefinder, Drone pro 10X, Armasight
Rangefinder, Drone pro 15X, Armasight
APLR1 SFP IR MIL, Midas BTR 2.5-15×50, Athlon
AHMR-SFP-IR-MOA, Midas BTR 4.5-27x, Athlon
APMR-FFP-IR-MIL, Argos BTR 6-24x50, Athlon
ATMR-FFP-IR-MOA, Argos BTR 6-24x50, Athlon
APLR2 FFP IR MIL, Talos BTR 4-14×44, Athlon
APLR2 FFP IR MOA, Helos BTR 6-24×50, Athlon
APMR-FFP-IR-MIL, Argos BTR 8-34x56, Athlon
ATMR-FFP-IR-MOA, Argos BTR 8-34x56, Athlon
ATMR1-SFP-IR-MIL, Talos 6-24x50, Athlon
APLR3 FFP IR MOA, Ares BTR 2.5-15x50, Athlon
APLR3 FFP IR MOA, Ares BTR 4.5-27x50, Athlon
APLR3 FFP IR MIL, Ares BTR 4.5-27x50, Athlon
TDR BDC, XP8 1-8x, Atibal
Horseshoe dot, XP6 Mirage 1-6x FFP, Atibal
5.56/.308 TCR BDC, STRIIKER, Atibal
R5, X-Sight II HD 3-14x, ATN
R5, X-Sight II HD 5-20x, ATN
DYND-1 (MOA), Emerald 5.5-25x50, Aztec
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, Fullfield E1 6.5-20x50, 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
SCR Mil (Burris)
SCR MOA (Burris)
Ballistic Circle Dot, XTR II 1-8x, 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)
Drop Zone 6.5 Creedmoor, 4.5-18x40, 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)
G2H, LRHS 4.5-18x44, Bushnell
DOA LR600, Trophy Xtreme 2.5-15x50, Bushnell
DOA LR600, Trophy Xtreme 4-16x44, Bushnell
DOA LR800, Trophy Xtreme 6-24x50, Bushnell
Deploy MOA, Engage 2-7x36, Bushnell
Deploy MOA, Engage 3-9x, Bushnell
Deploy MOA, Engage 2.5-10x44, Bushnell
Deploy MOA, Engage 3-12x42, Bushnell
Deploy MOA, Engage 4-12x40, Bushnell
Deploy MOA, Engage 4-16x44, Bushnell
Deploy MOA, Engage 6-18x50, Bushnell
Deploy MOA, Engage 6-24x50, 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)
FFP, 4-16x Covenant, Cabela's
FFP, 6-24x Covenant, Cabela's
TAC 32, 4-16x Covenant SFP, Cabela's
TAC 32, 6-24x Covenant SFP, Cabela's
.223, AR 1-4x24 , Cabela's
AR-223, 1-4x24 , Cabela's
AR-223, 1-6x24 , 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)
2D, 1.5-9x45, Delta
DLTW FFP, Discovery
DLTW SFP, HD 3-15, Discovery
SS FFP IR-MIL, HD 4-24X50SFIR, Discovery
BDA, 2.5-10x48 (Docter)
BDA, 3-12x56 (Docter)
Duplex 30/30
MPR (EDgun)
MPR 2, 12x44 (EDgun)
Dedal Stalker 6X, 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)
SR1, Vudu 1-6x, EOTech
SR2, Vudu 1-6x, EOTech
SR3, Vudu 1-6x, 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 2.5-15×50, Hawke
TMX, Frontier 30 SF 5-30×50, Hawke
LR Dot, Endurance 8x56, Hawke
Hensoldt 3-12x56 SSG
Hensoldt ZF 3.5-26x56
CMR, HiLux (Leatherwood)
CMR-AK762, Hilux (Leatherwood)
308 BDC, 2-7x, Hilux (Leatherwood)
Mil Dot BDC, 8-32x50, Hilux
ART (Holland)
Circle Dot, Holosun
HS-2, 5-20x, Huskemaw
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
SH4-58, 6-24x50, IOR/Valdada
X01i, 1-4x24 Jaeger, Yukon
X02i, 3-9x Jaeger, Yukon
X02i, 3-12x Jaeger, Yukon
Reticle 1, Photon XT, Yukon
Reticle 2, Photon XT, Yukon
Reticle 5, Photon XT, Yukon
T53i, Photon RT, Yukon
4D (C2.5-10x50 Kahles)
4D (C3-12x56 Kahles)
SI1, 1-5x, Kahles
SM1, 1-6x, Kahles
SI1, 1-6x, Kahles
3GR, 1-6x, 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)
Mil 4, K624i 6-24x56, Kahles
SKMR 1, K624i 6-24x56, Kahles
SKMR 2, K624i 6-24x56, Kahles
SKMR 3, K624i 6-24x56, Kahles
SM2, 1-6x, Kahles
Ballistic 550, 3-9x (Konus)
Ballistic 550, 3-12x, Konus Pro
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)
UMOA, UTG 2-16x44, 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)
Ballistic, 6.5-26x56 LRS (Leica)
Magnum Ballistic, 6.5-26x56 LRS (Leica)
Ballistic, ER 5 1.5-8x32, Leica
Ballistic, ER 5 2-10x50, Leica
Ballistic, ER 5 3-15x56, Leica
Ballistic Magnum, ER 5 2-10x50, Leica
Ballistic Magnum, ER 5 3-15x56, Leica
Ballistic Magnum, ER 5 4-20x50, Leica
Ballistic Magnum, ER 5 5‐25x56, 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)
Varmint Hunter's, VX3 8.5-25x, Leupold
LR Varmint Hunter's (Leupold)
LR Varmint Hunter's, 6.5-20x50 LR TARGET, Leupold
Boone and Crockett (Leupold)
Boone and Crockett, VX-III 3.5-10x, Leupold
Ballistic Firedot (Leupold)
SA.B.R. (Leupold)
LRV Duplex (Leupold)
CM-RW, 5.56/.223 (Leupold)
CM-RW, 7.62/.308 (Leupold)
CM-RW DEVO, 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 4.5-14x, 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-1/2 3-9x, Leupold)
Duplex (VX-1/2 4-12x, Leupold)
Duplex (VX-2 1-4x, 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, Leupold
Wind-Plex, 4.5-14x, Leupold
Wind-Plex, VX-5 HD 2-10x, Leupold
Wind-Plex, VX-5 HD 3-15x, Leupold
LR Wind-Plex, American Marksman 3-9x40, 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)
Firedot BDC, VX-6 1-6х, Leupold
Duplex (VX-6 2-12x, 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)
Illum. German #4 Dot, VX-3L 4.5-14x50, Leupold
Rifleman Ballistic, 3-9x (Leupold)
300 Blackout (Leupold)
TS-29X1, 6.5-20x, Leupold
TS-32X1, 4.5-14x, Leupold
TMOA (Leupold)
Holland 21 MOA, VX-6 3-18x, Leupold
Greybull Precision (Leupold)
Greybull Precision Gen2 (Leupold)
Rimfire MOA, VX-Freedom 3-9x40, Leupold
L5 (Lucid)
Chevron (HD7, Lucid)
Drop Dot (HD7, Lucid)
P7 (Lucid)
MLX, 4.5-18x44, 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
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
Marcool MAR-015
Marcool MAR-081 HY1360
MAR-118, 3-18X50 SFL FFP HY1390, Marcool
MOA, RS.1 2.5-15X44, Maven
SHR, RS.1 2.5-15X44, Maven
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, 6-25x LRS, Millett
Mil-DotBar, 4-16x TRS, Millett
Donut-Dot, DMS 1-4x24, Millett
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)
Mino-Tac Illum., ZA5 HD TAC 3-15x, Minox
MR10, ZP8 1-8x24 (Minox)
MR10+, ZP8 1-8x24 (Minox)
MR4, ZP5 5-25x56, Minox
BDC, ZX5 3-15x, Minox
BDC, ZX5 5-25x, Minox
Range Finder, 1-6x24, Monstrum Tactical
Range Finder, 3-9x, Monstrum Tactical
SCB (MTC Optics)
AMD (MTC Optics)
SCB 2 (MTC Optics)
SCB 2, 3-18x, MTC Optics
SCB 2, 5-30x, MTC Optics
MH10X, EVX 3-12x44, Optisan 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, 1-4x, Nightforce
NP-RF1, 3.5-15x FFP, Nightforce
FCR-1, 15-55x, Nightforce
FC-2, 1-4x, Nightforce
CH-3 (Nightforce)
IHR (2.5-10x, Nightforce)
FC-DM, ATACR 1-8x24 F1, 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)
HMD, 4-14x44 FFP Diamond, Nikko Stirling
HMD, 6-24x50 FFP Diamond, 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)
Precision, PROSTAFF Target EFR 3-9x, Nikon
Advanced BDC, Monarch, 2.5-10x, Nikon
Advanced BDC, Monarch 5, 4-20x50 (Nikon)
Advanced BDC, Monarch 5, 5-25x50 (Nikon)
Advanced BDC, Monarch 5, 6-30x50 (Nikon)
#4, Monarch 3 1-4x20, Nikon
#4, Prostaff 7 1-4x24, Nikon
X-MRAD, BLACK X1000 4-16x50SF, Nikon
X-MOA, BLACK X1000 4-16x50SF, Nikon
X-MRAD, BLACK X1000 6-24x50SF, Nikon
MK1-MOA, M-TACTICAL 3-12x42SF, Nikon
MK1-MRAD, M-TACTICAL 3-12x42SF, Nikon
Red dot ballistic, 1-6x24, Nord Arms
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 5.56/5.45/.308 Gen III, 1-6x24 SFP, 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
ACSS 300BLK/7.62X39, 1-6x24 SFP, Primary Arms
ACSS 22LR, 6x32, Primary Arms
ACSS 5.56, 3X Compact Prism Scope, 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)
T51AI, N960/N970, Pulsar
X51i, N960/N970, Pulsar
M54i, N960/N970, Pulsar
M52i, Trail XQ50, Pulsar
T51AI, Trail XQ50, Pulsar
M51i, Trail XP50, Pulsar
T52i, Trail XP50, Pulsar
X51i, Trail XP50, Pulsar
T51AI, Trail XP50, Pulsar
M56Fi, Trail XP50, Pulsar
M52i, Digisight Ultra N355, 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)
DH 1-7x24, Dedal, Russia
DH 7-28x56, Dedal, Russia
POSP 8x42 (Russia)
PSO-1-1 (Russia)
FFT (Pilad, Russia)
SNR (Pilad, Russia)
PDS Universal (Russia)
PN19K-3 (Russia)
RusOpticalSystem, PKT 3-12x50, Russia
1PN93-2, Russia
CD, P4x32L, Pilad, 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)
FD7, 2.5-10x56 Zenith, Schmidt&Bender
A7, 3-12x50 Klassik, (Schmidt&Bender)
L3, 3-12x50 Zenith (Schmidt&Bender)
CQB, 1.1-4x20, Schmidt&Bender
P1 Bryant (Schmidt&Bender)
DRS 1, Shepherd
DRS 2, Shepherd
P3 (Shepherd)
P1A, PE1, V1A (Shepherd)
Varminter M.556 (Shepherd)
P22 LR (Shepherd)
P22 MAG (Shepherd)
Trifecta Reticle System (4-12x44 Scheels)
AHR, 12х44, SHR Optics
CSR, 6х32, SHR Optics
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, TANGO6 (Sig Sauer)
3-Gun, 1-6x TANGO6, Sig Sauer
5.56/7.62 Horseshoe Dot, TANGO6 1-6x24, Sig Sauer
MRAD Milling, TANGO4 4-16x44, Sig Sauer
MOA Milling, TANGO4 4-16x44, Sig Sauer
DEV-L MRAD, TANGO4 4-16x44, Sig Sauer
DEV-L MOA, TANGO4 4-16x44, Sig Sauer
Smart Reticle (Simmons)
Truplex, Blazer 3-9x40 (Simmons)
Truplex, Aetec 2.8-10x44 (Simmons)
SCR (Steiner)
MSR (Steiner)
B4I-2FP, M5Xi 5-25x56, Steiner
3TR 7.62, T5Xi 1-5x24, Steiner
3TR 5.56, T5Xi 1-5x24, Steiner
P3TR, P4Xi 1-4x24, Steiner
Plex S1 (4-16x, Steiner)
Mini (1.5-6x42, Sturman)
BR (Swarovski)
4A-300 (Swarovski)
TDS-4 (Swarovski)
TDS (Swarovski)
BRT-I, Z6i 1-6x24, Swarovski
BRT-I, Z8i 1-8x24, Swarovski
BRX&BRH (Swarovski)
#4A, Habicht, 6x42, Swarovski
4A-I (2.5-15x56, Swarovski)
4A-I (2-12x50, Swarovski)
4A-I, Z6i, 5-30x50, Swarovski
4A-IF, Z8i 1-8x24, Swarovski
4A-I, Z8i 1-8x24, Swarovski
4A-I, Z8i 2.3-18x56, Swarovski
#4 (1-6x24, Swarovski)
#4 (1-6x24 EE, Swarovski)
4W (Swarovski)
4-I (Z6i, 1-6x24, Swarovski)
4-NK (Swarovski)
Plex, Z3, 4-12x50, 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)
BRM/MRB, X5 3.5-18x50, Swarovski
BRM/MRB, X5 5-25x56, Swarovski
Plex (3-9x50, Swiss arms)
Mil-Quad (SWFA)
20x MOA-Quad, 20x42, SWFA
Donut (SWFA)
SS1-4 Donut (SWFA)
Mil-Quad DM, SS 1-4x24 SFP (SWFA)
Mil-Quad DM, 3-15x42 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)
Segmented Circle .223/77, VCOG 1-6x24, Trijicon
Segmented Circle .223/55, AccuPower 1-4x24, Trijicon
MIL Segmented Circle, AccuPower 1-8x28, Trijicon
MOA Segmented Circle, AccuPower 1-8x28, Trijicon
300 BLK, ACOG TA02, Trijicon
MIL-Square, AccuPower 4-16x50, Trijicon
Crosshair .223/69gr., TA33-C-400121, Trijicon
BDC (Truglo)
BDC, Intercept 3-9x42, Truglo
BDC, Intercept 4-12x44, Truglo
BDC, Nexus 3-9x42, Truglo
BDC, Nexus 4-12x44, Truglo
MilDot (USMC)
MilDot (US Army)
Mil Dot, 4.5x20, Unmark
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)
Mil Scale (US Optics)
EMDR (Weaver)
CIRT (Weaver)
TBX (Weaver)
.223 Ballistic-X (Weaver)
EBX (Weaver)
Ballistic-X (Weaver)
FBR (Valiant)
MPR (FFP), Vector Optics
MPR (SFP), Vector Optics
MP, Vector Optics
MPT1, Vector Optics
MPN-1, Vector Optics
MPX1, Taurus 5-30x56, Vector Optics
MPR, Paragon 3-15x50, Vector Optics
G4, 2.5-15x50, Vixen
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
V-Plex, Crossfire II 4-16x50, 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 MRAD, Viper PST II 3-15x FFP, Vortex
EBR-2C MRAD, Viper PST II 5-25x FFP, Vortex
EBR-2C MOA (4.5-27x, Vortex)
EBR-2C MOA (6-24x, Vortex)
EBR-2C MOA, Viper PST II 3-15x FFP, Vortex
EBR-2C MOA, Viper PST II 5-25x FFP, Vortex
EBR-1C MRAD (4.5-27x, Vortex)
EBR-3 (Vortex)
EBR-556B (MOA) (Vortex)
CQMR-1 (Vortex)
AR-BDC, 1-6x24, Vortex
AR-BDC 2, Strike Eagle 1-8x, Vortex
EBR-2 (Razor HD 5-20x50, Vortex)
HSR-4 (3-15x, Vortex)
G4 BDC, 3-15x, Vortex
DRT (MOA), Spitfire, Vortex
ECR-1, 15-60x52, Vortex
EBR-7 MOA, Razor HD AMG 6-24x, Vortex
EBR-7 MRAD, Razor HD AMG 6-24x, Vortex
EBR-4, Viper PST II 3-15x, Vortex
EBR-4, Viper PST II 5-25x, Vortex
EBR-4 MOA, Strike Eagle 3-18x44, 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 4.5-14x, Zeiss
Z-Plex (Conquest HD5 5-25x50, Zeiss)
Z-Plex, Conquest HD5 3-15x42, Zeiss
Z-Plex (Victory Diavari, Zeiss)
#60, Classic Diavari, 3-12x, Zeiss
#6/#60 (Duralit, 1.2-5x, 2-8x, 3-12x, Zeiss)
V69 (2.5-10x, 3-12x, Victory Varipoint iC, Zeiss)
#66 (Victory Diarange 2.5-10x, Zeiss)
#42 (Diavari VM/V, 2.5-10x, Zeiss)
#4 (Diavari VM/V, 1.5-6x, Zeiss)
RZ-8 (Zeiss)
RZ-6 (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
ZBR-2, Conquest V6 3-18x50, Zeiss
ZBR-1, Conquest V4 6-24x50, Zeiss
ZMOA-1, Conquest V4 6-24x50, Zeiss
ZMOA-2, Conquest V4 4-16x44, 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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