iStrelok is a ballistic trajectory calculator.
- 773 reticles supported! Full list see here:
- You can see holdovers on your reticle and scale holdovers to any magnification (if reticle is located in second focal plane).
- Trajectory calibration ("Truing") feature.
- abitity to change target type and select from: Round target (you can change diameter), Old IPSC Target, IPSC Target, IPSC Universal Target, IPSC Mini Target, IPSC A4 Target, IPSC A Target, Target number 4. And animals targets: Fox, Coyote, Wild Boar, Aoudad, Crow, Moose, Elk, Whitetail Deer, Rabbit, Rat, Pingeon, Marmot.
- ability to input current altitude from internal GPS sensor
- supports WeatherFlow WINDmeter (not WEATHERmeter)
- iPhone internal barometer support
Small, handy and accurate. Field-proven accuracy since 2001.
Supports imperial units (yards, feet, inches, etc).

What’s New

Version 3.76

Added reticles:
- EBR-4 MRAD, Viper PST II 2-10x32 FFP, Vortex
- MOAR, ATACR 5-25x56 F1, Nightforce
- ACSS APOLLO 6.5CM, 3-18x50 FFP, Primary Arms
- ACSS Griffin MIL, 1-8x24 FFP, Primary Arms

Ratings and Reviews

4.2 out of 5
26 Ratings
26 Ratings
Bikerbob52 ,

Great ballistics program and a responsive software developer

Love the app and use it all the time for hunting. Simple and accurate with lots of features to customize ammunition, targets, and compensates for differing environmental conditions from zeroing conditions. The developer is very responsive to my requests for adding new reticles.

I don’t know how well this will work for super long range bench rest shooters but it is a great tool for all of your practical hunting and sighting needs.

Shytbyrd ,

Ballistic AE better

This is an ok app, and it does work as advertised. That said, I’ve contacted Igor several times to inquire about giving the user the option to choose what outputs the user wants to see. I personally use MRAD only, and do not want to see the values for MOA or clicks - this just clutters up things showing useless data. Also leaves room for mistakes. For a couple of years I’ve been told that he would look into it and update the app - this is just lip service. Ballistic AE is a better app and only outputs the data you want.

Hawgwild23 ,

Lots of potential

The architecture of this app is great. However, I compared results of various load and calibers to some name brand site calculators. When it came to a .223 Federal Fusion 62 gr., it failed to calculate properly. I compared it to Federal and Winchester calculators and it was wrong. Federal and Winchester was almost identical. Anyone would love a cartridge like this app shows. I email the developer more than once and sent him the data. He said he found no problem.


Igor Borisov
14.8 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Italian, Polish, Russian, Spanish
Age Rating
Rated 4+
© Igor Borisov


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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